Method, device, storage medium and program product for thermal runaway regulation of energy storage equipment

Abstract

The present application relates to the technical field of energy storage equipment, and discloses an energy storage equipment thermal runaway adjusting method, equipment, storage medium and program product, the energy storage equipment thermal runaway adjusting method comprises: obtaining the first parameter of each energy storage unit in the energy storage equipment group, the first parameter is the parameter when the energy storage equipment group normally works;According to the first parameter, each energy storage unit is divided into a master unit and multiple slave units;The energy storage equipment group is detected for thermal runaway;When it is detected that the energy storage equipment group is about to occur thermal runaway, the parameter of the energy storage equipment group is adjusted based on the first parameter and the specified charge-discharge efficiency;When it is detected that the master unit occurs thermal runaway, the energy storage equipment group is closed;When it is detected that the slave unit occurs thermal runaway, the slave unit that occurs thermal runaway is closed, and the parameter of the energy storage equipment group is adjusted based on the specified charge-discharge efficiency.The present application can realize thermal runaway processing while ensuring the working efficiency of the energy storage equipment.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage devices, in particular to an energy storage device thermal runaway regulation method, device, storage medium and program product. BACKGROUND

[0002] The development trend of energy storage thermal runaway is a complex and critical problem, involving battery technology, system design, operating environment and other aspects. With the wide application of battery energy storage systems, the thermal runaway problem has gradually attracted the attention of the industry. It needs to be clear that thermal runaway is a phenomenon that the internal chemical reaction of the battery is out of control under certain conditions such as high temperature, overcharge, internal short circuit, etc., generating a large amount of heat and possibly causing a fire. Therefore, for energy storage devices, preventing and controlling thermal runaway is the key to ensuring system safety.

[0003] And the battery thermal runaway suppression of the energy storage system mainly includes determining the thermal runaway warning state of the battery, and taking corresponding control measures according to the warning state. When the battery is in a thermal runaway uncontrollable state, a prevention control will be taken to suppress the thermal runaway, so as to quickly stabilize the internal components of the battery, block the process of rapid release of chemical energy and generation of a large amount of heat in a short time, and reduce the probability of thermal runaway.

[0004] At present, the operating state of the energy storage device is detected in real time, and the battery cell is controlled at a reasonable temperature by relying on the thermal management device. However, the working efficiency of the energy storage device cannot be guaranteed during the management process. SUMMARY

[0005] Therefore, the present application provides an energy storage device thermal runaway regulation method, device, storage medium and program product, which can realize thermal runaway processing while ensuring the working efficiency of the energy storage device.

[0006] In a first aspect, the present application provides an energy storage device thermal runaway regulation method, which comprises: obtaining first parameters of each energy storage unit in an energy storage device group, the first parameters being parameters when the energy storage device group is working normally; dividing each energy storage unit into a master unit and multiple slave units according to the first parameters; performing thermal runaway detection on the energy storage device group; when it is detected that the energy storage device group is about to have thermal runaway, performing parameter adjustment on the energy storage device group based on the first parameters and a specified charge-discharge efficiency; when it is detected that the master unit has thermal runaway, shutting down the energy storage device group; when it is detected that the slave unit has thermal runaway, shutting down the slave unit having thermal runaway, and performing parameter adjustment on the energy storage device group based on the specified charge-discharge efficiency.

[0007] In the implementation mode, each energy storage unit is divided into a master unit and a slave unit according to the parameter information of the energy storage unit. After thermal runaway detection, the parameter of each unit is adjusted according to the specified charging and discharging efficiency, the master unit and the slave unit are set with different priorities, all energy storage units are closed when the master unit has thermal runaway, and only the slave unit is closed when the slave unit has thermal runaway, so that other energy storage devices in a safe state continue to operate to ensure the working efficiency of the energy storage device. The method can ensure the working efficiency of the energy storage device while realizing the safe processing of thermal runaway.

[0008] In an implementation mode, the first parameter includes an input voltage, a discharge current, a rated power and an actual capacity, and the division of each energy storage unit into a master unit and multiple slave units according to the first parameter includes: obtaining an actual capacity ratio of each energy storage unit, and determining a first unit with an actual capacity ratio greater than a first preset value; obtaining the input voltage, the discharge current and the rated power of the first unit, and taking the first unit with the highest input voltage, the highest discharge current and the highest rated power as the master unit, and taking the other units as the slave units.

[0009] In the implementation mode, the energy storage unit with the largest input voltage, discharge current, rated power and actual capacity is taken as the master unit, so that the parameter variation of the master unit has a greater impact on the entire energy storage device group, and the parameter variation of the slave unit has a smaller impact on the entire energy storage device group, which can cope with different thermal runaway situations.

[0010] In an implementation mode, before the thermal runaway detection of the energy storage device group, the method further includes: obtaining a specified charging and discharging efficiency of the energy storage device group at present; determining a first safety parameter of the master unit and the slave unit based on the specified charging and discharging efficiency and the first parameter, the first safety parameter being a parameter range of the master unit and the slave unit in a safe working state under standard conditions; and when it is detected that the energy storage device group is about to have thermal runaway, adjusting the parameters of the energy storage device group based on the first parameter and the specified charging and discharging efficiency includes: when it is detected that the energy storage device group is about to have thermal runaway, adjusting the parameters of the master unit and the slave unit based on the specified charging and discharging efficiency and the first safety parameter.

[0011] In the implementation mode, the first safety parameter of the master unit and the slave unit is determined, and the parameter adjustment is performed under the guarantee of the first safety parameter, so that the charging efficiency and the running safety of the energy storage unit can be ensured.

[0012] In an implementation mode, determining a first safety parameter range of the master unit and the slave unit based on the specified charging and discharging efficiency and the first parameter includes: determining the first safety parameter of the master unit in the first parameter of the master unit according to a first preset proportion, and determining the first safety parameter of the slave unit in the first parameter of the slave unit according to a second preset proportion; and the first preset proportion is less than the second preset proportion.

[0013] In an implementation manner, when it is detected that the thermal runaway of the energy storage device group is about to occur, the parameter adjustment of the master unit and the slave unit based on the specified charging and discharging efficiency and the first safety parameter comprises: when it is detected that the master unit is about to occur the thermal runaway, the input voltage and the discharge current of the master unit are reduced, and the input voltage and the discharge current of the slave unit are increased based on the specified charging and discharging efficiency and the first safety parameter of the slave unit; when it is detected that the slave unit is about to occur the thermal runaway, the input voltage and the discharge current of the slave unit are reduced, and the input voltage and the discharge current of the master unit are increased based on the specified charging and discharging efficiency and the first safety parameter of the master unit.

[0014] In this implementation manner, while the parameter data of the energy storage unit about to occur the thermal runaway is reduced, the parameter data of the normally operating energy storage unit is increased according to the specified charging and discharging efficiency and the first safety parameter, which can ensure the operation safety of the normally operating energy storage unit and the charging and discharging efficiency of the entire energy storage device group while reducing the temperature of the energy storage unit about to occur the thermal runaway.

[0015] In an implementation manner, when it is detected that the slave unit occurs the thermal runaway, the slave unit occurring the thermal runaway is closed, and the parameter adjustment of the energy storage device group based on the specified charging and discharging efficiency comprises: obtaining the updated actual capacity proportion of the master unit in the updated energy storage device group; obtaining the increase ratio of the initial actual capacity proportion to the updated actual capacity proportion; reducing the first safety parameter of the master unit according to the increase ratio to obtain the second safety parameter of the master unit; taking the first safety parameter of the slave unit as the second safety parameter of the updated slave unit, and the second safety parameter is the parameter range of the safe operation of the master unit and the updated slave unit under the standard condition; and adjusting the parameters of the master unit and the updated slave unit based on the specified charging and discharging efficiency and the second safety parameter.

[0016] In this implementation manner, after the slave unit is closed, the entire energy storage device group occurs the device update, and the second safety parameters of the master unit and the slave unit are re-set according to the updated device condition, so that the updated energy storage device group can better guarantee the specified charging and discharging efficiency and better protect the master unit and the remaining slave units.

[0017] In an implementation manner, after the parameter adjustment of the energy storage device group, it comprises: detecting the actual charging and discharging efficiency of the energy storage device group; calculating the efficiency proportion of the actual charging and discharging efficiency to the specified charging and discharging efficiency; and when the efficiency proportion is less than a third preset proportion, the energy storage device group is closed.

[0018] In this implementation manner, when the actual charging and discharging efficiency of the energy storage device group is low, the energy storage device group cannot normally complete the charging and discharging task, and the energy storage device group is closed to protect the energy storage device group and improve the efficiency.

[0019] In a second aspect, the present application provides a computer device, comprising: a memory and a processor, which are connected with each other in communication, and the memory stores computer instructions, and the processor executes the computer instructions to perform the energy storage device thermal runaway regulation method of the first aspect or any of the corresponding embodiments.

[0020] In a third aspect, the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions are used to make a computer execute the energy storage device thermal runaway regulation method of the first aspect or any of the corresponding embodiments.

[0021] In a fourth aspect, the present application provides a computer program product, which comprises computer instructions, and the computer instructions are used to make a computer execute the energy storage device thermal runaway regulation method of the first aspect or any of the corresponding embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments or prior art technical solutions of the present application, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can obtain other drawings according to these drawings without creative labor.

[0023] Figure 1 is a flow chart of an energy storage device thermal runaway regulation method according to an embodiment of the present application;

[0024] Figure 2 is a flow chart of another energy storage device thermal runaway regulation method according to an embodiment of the present application;

[0025] Figure 3 is a structural block diagram of an energy storage device thermal runaway regulation device according to an embodiment of the present application;

[0026] Figure 4 is a hardware structure schematic diagram of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be described clearly and completely in combination with the drawings of the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the present application.

[0028] According to the embodiment of the present application, a method for adjusting thermal runaway of an energy storage device is provided. It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown here.

[0029] In this embodiment, a method for adjusting thermal runaway of an energy storage device is provided, Figure 1 is a flowchart of a method for adjusting thermal runaway of an energy storage device according to an embodiment of the present application. It should be noted that the order of the flow shown is not limited if there is substantially the same result. As shown in Figure 1 , the flow includes the following steps: Figure 1

[0030] Step S101: Obtain the first parameters of each energy storage unit in the energy storage device group.

[0031] The first parameter is the parameter of the energy storage unit when the energy storage device group is working normally.

[0032] Specifically, the energy storage units working normally in the energy storage device group are determined, and the parameters of each energy storage unit when working normally are determined to obtain the corresponding first parameters.

[0033] In one implementation, the first parameters include input voltage, discharge current, rated power, and actual capacity, etc.

[0034] It can be understood that the energy storage units are different, so the first parameters corresponding to each energy storage unit may be different. For example, the energy storage device group includes three energy storage units, wherein the rated power of the energy storage unit 1 is 1KW-100KW, the rated power of the energy storage unit 2 is 1KW-50KW, and the rated power of the energy storage unit 3 is 1KW-10KW.

[0035] Step S102: Divide each energy storage unit into one master unit and multiple slave units according to the first parameters.

[0036] According to the differences in input voltage, discharge current, rated power, and actual capacity of each energy storage unit, the energy storage units are divided, and one energy storage unit is determined as the master unit, and the other energy storage units are determined as the slave units.

[0037] The master unit and the slave unit have different adjustment priorities. The master unit is preferentially monitored and adjusted to ensure normal operation of the energy storage device group, and the slave unit is auxiliary monitored and adjusted to cooperate with the operation of the master unit.

[0038] ​In an implementation, when parameter adjustment is needed, the master unit is first adjusted, and then the parameters of the slave units are adjusted based on the adjustment ratio of the master unit, so as to ensure the charging and discharging efficiency.

[0039] In an implementation, when the current ambient temperature is high or the charging and discharging demand is low, the slave units are preferentially closed to avoid thermal runaway of the energy storage device group caused by excessively high temperature or excessively large input voltage change.

[0040] In an implementation, when the master unit has occurred thermal runaway or has a risk of thermal runaway in a short time, the energy storage device group is directly closed.

[0041] In an implementation, when one or more slave units have occurred thermal runaway or have a risk of thermal runaway in a short time, the slave unit is selected to be closed or replaced according to the current charging and discharging demand. Understandably, if the current charging and discharging demand is low and other energy storage units can meet the charging and discharging demand, the slave unit with thermal runaway is directly selected to be closed; if the current charging and discharging demand is high and there is a slave unit in a closed state, the slave unit is selected to be replaced.

[0042] Step S103, thermal runaway detection is performed on the energy storage device group.

[0043] The running temperature and the running temperature growth rate of each energy storage unit in the energy storage device group are detected. When it is detected that the running temperature of an energy storage unit is greater than a first preset temperature, it is determined that the energy storage unit has occurred thermal runaway; when it is detected that the running temperature of an energy storage unit is greater than a second preset temperature and the running temperature growth rate is high, it is determined that the energy storage unit is about to occur thermal runaway.

[0044] When it is detected that the master unit and / or the slave unit is about to occur thermal runaway, step S104 is performed; when it is detected that the master unit has occurred thermal runaway, step S105 is performed; when it is detected that the slave unit has occurred thermal runaway, step S106 is performed.

[0045] Step S104, when it is detected that the energy storage device group is about to occur thermal runaway, the parameters of the energy storage device group are adjusted based on the first parameters and the specified charging and discharging efficiency.

[0046] When it is detected that the energy storage device group is about to occur thermal runaway, the energy storage unit that has occurred thermal runaway is determined, the running parameters of the energy storage unit are lowered, and the running parameters of other energy storage units are increased based on the first parameters of the other energy storage units and the specified charging and discharging efficiency, so as to ensure the specified charging and discharging efficiency under the condition of safe operation.

[0047] Step S105, when it is detected that the master unit has occurred thermal runaway, the energy storage device group is closed.

[0048] The master unit has the highest priority, and when the master unit is detected to have thermal runaway, all energy storage units in the energy storage device group are directly turned off to stop the operation of the energy storage device group.

[0049] In step S106, when the slave unit is detected to have thermal runaway, the slave unit having thermal runaway is turned off, and the energy storage device group is parameter-adjusted based on the specified charge-discharge efficiency.

[0050] The slave unit does not affect the operation of the master unit, and when the slave unit has thermal runaway, only the slave unit having thermal runaway is turned off, and the master unit and other slave units are further parameter-adjusted based on the specified charge-discharge efficiency to ensure the specified charge-discharge efficiency.

[0051] The energy storage device thermal runaway adjustment method provided in the embodiment divides each energy storage unit into a master unit and slave units according to the parameter information of the energy storage unit. After thermal runaway detection, the parameter of each unit is adjusted according to the specified charge-discharge efficiency, the master unit and the slave unit are set to different priorities, all energy storage units are turned off when the master unit has thermal runaway, and only the slave unit is turned off when the slave unit has thermal runaway, so that other energy storage devices in a safe state continue to operate to ensure the working efficiency of the energy storage device. The method can ensure the working efficiency of the energy storage device while realizing thermal runaway safety processing.

[0052] In the embodiment, an energy storage device thermal runaway adjustment method is provided, Figure 2 is a flowchart of another energy storage device thermal runaway adjustment method according to an embodiment of the present application. It should be noted that the embodiment is not limited to the flow order shown in Figure 2 . As shown in Figure 2 , the flow includes the following steps:

[0053] In step S201, the first parameters of each energy storage unit in the energy storage device group are obtained.

[0054] For details, see step S101 of the embodiment shown in Figure 1 , which will not be described here.

[0055] In step S202, each energy storage unit is divided into a master unit and multiple slave units according to the first parameters.

[0056] In step S2021, each energy storage unit is divided into a master unit and multiple slave units.

[0057] The actual capacity proportion of each energy storage unit is obtained, a first unit with an actual capacity proportion greater than a first preset value is determined, the input voltage, discharge current and rated power of the first unit are obtained, and the first unit with the highest input voltage, highest discharge current and highest rated power is taken as the master unit, and the other units are taken as slave units.

[0058] In an implementation manner, the first preset value is 50%. The energy storage unit with an actual capacity proportion greater than 50% and with the maximum rated power, maximum input voltage and maximum discharge current is taken as the master unit.

[0059] The capacity of the master unit accounts for more than 50% of the whole energy storage device group, and the rated power, input voltage and discharge current are all higher than those of other energy storage units. The parameter change of the master unit and thermal runaway of the master unit have a greater impact on the work of the whole energy storage device group. The capacity of the slave unit accounts for less than 10% of the whole energy storage device group, and the rated power, input voltage and discharge current are all lower than those of the master unit. The parameter change of the slave unit and thermal runaway of the master unit have a smaller impact on the work of the whole energy storage device group.

[0060] In the implementation manner, the energy storage unit with the maximum input voltage, maximum discharge current, maximum rated power and maximum actual capacity is taken as the master unit, so that the parameter change of the master unit has a greater impact on the whole energy storage device group, and the parameter change of the slave unit has a smaller impact on the whole energy storage device group, which can cope with different thermal runaway situations.

[0061] In step S2022, the current specified charging and discharging efficiency of the energy storage device group is obtained.

[0062] The charging and discharging efficiency is used to represent the working efficiency of the energy storage device group and reduce the index data of power consumption.

[0063] In an implementation manner, the charging and discharging efficiency is the energy efficiency ratio, the charging rate per unit time or the discharging rate per unit time.

[0064] In step S2023, the first safety parameter of the master unit and the slave unit is determined based on the charging and discharging efficiency and the first parameter.

[0065] The first safety parameter is the parameter range of the master unit and the slave unit in the standard condition. The first safety parameter includes the rated power range, the input voltage range and the discharge current range.

[0066] The standard condition is a conventional working environment, i.e. a current temperature range condition or a specified input voltage condition. For example, the current temperature range condition is 25-30 degrees Celsius, and the specified input voltage condition is 500V-1000V voltage.

[0067] The parameter range of the safe working of the energy storage device group refers to a range of the rated power, input voltage and discharge current of each energy storage unit in the energy storage device group under standard conditions, which meets the current system requirement for the charging and discharging efficiency of the energy storage device group according to the rated power of the energy storage device group.

[0068] For the master unit, the parameter change and thermal runaway have a greater impact on the working of the whole energy storage device group, and the proportion of the parameter range of the safe working of the master unit is small. For the slave unit, the parameter change and thermal runaway have a smaller impact on the working of the whole energy storage device group, and the proportion of the parameter range of the safe working of the slave unit is large.

[0069] Specifically, the first safety parameter of the master unit is determined in the first parameter of the master unit according to a first preset proportion, and the first safety parameter of the slave unit is determined in the first parameter of the slave unit according to a second preset proportion, wherein the first preset proportion is smaller than the second preset proportion.

[0070] For example, in a conventional working environment of 25-30 degrees Celsius, the input voltage of the current system is controlled at 500V-1000V, and the charging and discharging efficiency is set to be above 80%. On this basis, in the safe working range of the master unit, the rated power is selected from 70KW-100KW in 1KW-100KW, the maximum input voltage is 1000V-1200V, and the discharge current is selected from 1100A-1300A in 1000A-1500A; and in the safe working range of the slave unit, the rated power is selected from 2KW-10KW in 1KW-10KW, the maximum input voltage is 50V-100V, and the discharge current is selected from 100A-140A in 100A-150A.

[0071] In this implementation, the first safety parameter of the master unit and the slave unit is determined, and the parameter adjustment is performed under the guarantee of the first safety parameter, so that the safety of the energy storage unit can be ensured while the charging efficiency is ensured.

[0072] In step S203, the thermal runaway of the energy storage device group is detected.

[0073] For details, please refer to Figure 1 The step S103 of the embodiment is not repeated here.

[0074] In step S204, when it is detected that the thermal runaway of the energy storage device group is about to occur, the parameter adjustment of the energy storage device group is performed based on the first parameter and the specified charging and discharging efficiency.

[0075] The current temperature, temperature growth rate, rated power and discharge current of each energy storage unit are collected. If the temperature of one or more energy storage units is too high or the temperature growth rate is too fast, and the rated power or the discharge current exceeds the first safety parameter, it is considered that the thermal runaway of the energy storage unit is about to occur.

[0076] When it is detected that the energy storage device group is about to have thermal runaway, the master unit and the slave unit are adjusted in parameters based on the specified charge-discharge efficiency and the first safety parameter.

[0077] In some optional embodiments, the step S204 includes:

[0078] Step S2041, when it is detected that the master unit is about to have thermal runaway, the input voltage and the discharge current of the master unit are reduced, and the input voltage and the discharge current of the slave unit are increased based on the charge-discharge efficiency and the first safety parameter of the slave unit.

[0079] While ensuring the charge-discharge efficiency, the safety of the slave unit is ensured, and the input voltage and the discharge current of one or more slave units are increased.

[0080] If the current temperature, the temperature growth rate, and the rated power of the master unit are within the first safety parameter after the above processing, each energy storage unit temporarily maintains the current state of work, and the staff is notified to detect and handle the risk.

[0081] If the current temperature, the temperature growth rate, and the rated power of the master unit are not within the first safety parameter after the above processing, and the slave unit cannot increase the parameter value, the input voltage and the discharge current value of the master unit are continuously reduced, and it is determined whether the current energy storage device group can reach 80% of the specified charge-discharge efficiency. If yes, each energy storage unit temporarily maintains the current state of work, and the staff is notified to detect and handle the risk; if no, the current energy storage device group is shut down, and the staff is notified to detect and handle the risk.

[0082] Step S2042, when it is detected that the slave unit is about to have thermal runaway, the input voltage and the discharge current of the slave unit are reduced, and the input voltage and the discharge current of the master unit are increased based on the charge-discharge efficiency and the first safety parameter of the master unit.

[0083] While ensuring the charge-discharge efficiency, the safety of the master unit is ensured, and the input voltage and the discharge current of the master unit are increased.

[0084] If the current temperature, the temperature growth rate, and the rated power of the slave unit are within the first safety parameter after the above processing, each energy storage unit temporarily maintains the current state of work, and the staff is notified to detect and handle the risk.

[0085] If the current temperature, temperature growth rate, and rated power of the slave unit are not within the first safety parameter after the above processing, and the master unit cannot increase the parameter value, the slave unit input voltage and discharge current value are continuously reduced, and it is determined whether the current energy storage device group can reach 80% of the specified charging and discharging efficiency. If yes, each energy storage unit temporarily maintains the current state of operation, and the staff is notified to perform risk detection and processing. If no, the current energy storage device group is closed, and the staff is notified to perform risk detection and processing.

[0086] In this implementation, while reducing the parameter data of the energy storage unit about to undergo thermal runaway, the parameter data of the normally operating energy storage unit is increased according to the specified charging and discharging efficiency and the first safety parameter, which can ensure the operation safety of the normally operating energy storage unit and the charging and discharging efficiency of the entire energy storage device group while reducing the temperature of the energy storage unit about to undergo thermal runaway.

[0087] Step S205, when the master unit undergoes thermal runaway, the energy storage device group is closed.

[0088] If the current parameter of the master unit exceeds the first safety parameter or thermal runaway occurs, the energy storage device group is closed.

[0089] Step S206, when the slave unit undergoes thermal runaway, the slave unit undergoing thermal runaway is closed, and the parameter of the energy storage device group is adjusted.

[0090] If the current parameter of the slave unit exceeds the first safety parameter or thermal runaway occurs, the slave unit undergoing thermal runaway is closed, and the updated energy storage device group is re-adjusted.

[0091] Specifically, the above step S206 includes:

[0092] Step S2061, obtaining the second safety parameter of the master unit and the updated slave unit.

[0093] The second safety parameter is the parameter range of the master unit and the updated slave unit under standard conditions when working safely. The second safety parameter includes a rated power range, an input voltage range, and a discharge current range.

[0094] In some optional embodiments, the above step S2061 includes:

[0095] Step b1, obtaining the updated actual capacity proportion of the master unit in the updated energy storage device group.

[0096] Step b2, obtaining the increase ratio of the initial actual capacity proportion to the updated actual capacity proportion.

[0097] The initial actual capacity ratio is the actual capacity ratio of the master unit calculated when the last energy storage device group is updated.

[0098] In step b3, the first safety parameter of the master unit is reduced according to the increase ratio to obtain the second safety parameter of the master unit.

[0099] In step b4, the first safety parameter of the slave unit is taken as the second safety parameter of the updated slave unit.

[0100] For example, when 2 slave units are closed, the updated actual capacity ratio of the master unit in the updated energy storage device group is calculated as the actual capacity of the master unit / the total capacity of the current energy storage device group, and the updated actual capacity ratio is 55%. The initial actual capacity ratio is 55%. The increase ratio of the initial actual capacity ratio to the updated actual capacity ratio is 5%. The first safety parameter range of each parameter of the master unit is reduced by the same ratio, for example, the input voltage and discharge current range are reduced by 5%. In one implementation, the minimum value of the input voltage and discharge current is increased by 5%, and in another implementation, the maximum value of the input voltage and discharge current is reduced by 5%. The adjustment method is not limited in the present application.

[0101] In this implementation, when the slave units are closed, the entire energy storage device group is updated, and the second safety parameters of the master unit and the slave units are reset according to the updated device conditions, so that the updated energy storage device group can better guarantee the specified charging and discharging efficiency and better protect the master unit and the remaining slave units.

[0102] In step S2062, the parameters of the master unit and the updated slave units are adjusted based on the charging and discharging efficiency and the second safety parameters.

[0103] In the case where the current charging and discharging efficiency is unchanged, the input voltage and discharge current of the master unit are increased based on the second safety parameters.

[0104] If the energy storage device group reaches the current charging and discharging efficiency after the above processing, each energy storage unit temporarily maintains the current state and works, and the staff is notified to detect and handle the risk; if it does not reach, and the input voltage and discharge current values of the master unit reach the maximum value of the second safety parameters, the input voltage and discharge current values of the remaining slave units are increased until the requirement is met.

[0105] Further, the actual charging and discharging efficiency of the energy storage device group is detected, the efficiency ratio of the actual charging and discharging efficiency to the specified charging and discharging efficiency is calculated, and when the efficiency ratio is less than a third preset ratio, the energy storage device group is closed.

[0106] Specifically, if the input voltage of the master unit and all slave units and the discharge current value all reach the maximum value of the second safety parameter, it is determined whether the actual charge-discharge efficiency of the current energy storage device group reaches 80% of the specified charge-discharge efficiency. If yes, the units temporarily remain in the current state and work, and the staff is informed to detect and handle the risk. If not, the current energy storage device group is closed, and the staff is informed to detect and handle the risk.

[0107] In this implementation, when the actual charge-discharge efficiency of the energy storage device group is low, the energy storage device group cannot normally complete the charge-discharge task, and the energy storage device group is closed to protect the energy storage device group and improve the efficiency.

[0108] Further, if the master unit cannot be adjusted to the second safety parameter after the slave unit is closed, or the actual charge-discharge efficiency is lower than the threshold, the temperature, power, and SOC (State of Charge, the ratio of the remaining capacity of the battery to its rated capacity) of all current energy storage units are collected, combined with the current system working temperature, input voltage, and other parameters, analyzed, and the abnormal reason is found in time for processing.

[0109] The energy storage device thermal runaway regulation method provided in this embodiment divides each energy storage unit into a master unit and a slave unit according to the parameter information of the energy storage unit. The master unit and the slave unit are set to different priorities. When the master unit has thermal runaway, all energy storage units are closed. When the slave unit has thermal runaway, only the slave unit is closed, so that other energy storage devices in a safe state continue to operate to ensure the working efficiency of the energy storage device. When the master unit or the slave unit is about to have thermal runaway, the parameter data of the energy storage unit about to have thermal runaway is reduced, and the parameter data of the normally operating energy storage unit is increased according to the specified charge-discharge efficiency and the first safety parameter, so that the temperature of the energy storage unit about to have thermal runaway is reduced while the operation safety of the normally operating energy storage unit and the charge-discharge efficiency of the entire energy storage device group are ensured.

[0110] Meanwhile, the application proposes a safety parameter range adjustment method. After the devices in the energy storage device group are updated, the second safety parameters of the master unit and the slave unit are reset, so that the updated energy storage device group can better ensure the specified charge-discharge efficiency and better protect the master unit and the remaining slave units.

[0111] In this embodiment, an energy storage device thermal runaway regulation device is also provided, which is used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware is also possible and contemplated.

[0112] The embodiment provides a thermal runaway adjusting device of an energy storage device, as shown in Figure 3 , Figure 3 is a structural diagram of a thermal runaway adjusting device of an energy storage device according to an embodiment of the present application, and the thermal runaway adjusting device comprises:

[0113] The acquisition module 301 is configured to acquire a first parameter of each energy storage unit in an energy storage device group, and the first parameter is a parameter when the energy storage device group is normally working.

[0114] The division module 302 is configured to divide each energy storage unit into a master unit and a plurality of slave units according to the first parameter.

[0115] The detection module 303 is configured to detect thermal runaway of the energy storage device group.

[0116] The first adjusting module 304 is configured to perform parameter adjustment on the energy storage device group based on the first parameter and a specified charge-discharge efficiency when it is detected that the energy storage device group is about to have thermal runaway.

[0117] The second adjusting module 305 is configured to shut down the energy storage device group when it is detected that the master unit has thermal runaway.

[0118] The third adjusting module 306 is configured to shut down the slave unit having thermal runaway and perform parameter adjustment on the energy storage device group based on the specified charge-discharge efficiency when it is detected that the slave unit has thermal runaway.

[0119] Further function descriptions of the above modules are the same as those of the above corresponding embodiments, and thus are not described herein.

[0120] The thermal runaway adjusting device of the energy storage device in the embodiment is in the form of a functional unit, and the unit refers to an ASIC (Application Specific Integrated Circuit, Application Specific Integrated Circuit) circuit, a processor and a memory executing one or more software or fixed programs, and / or other devices capable of providing the above functions.

[0121] The embodiment of the present application further provides a computer device with the thermal runaway adjusting device of the energy storage device shown in Figure 3 .

[0122] Please refer to Figure 4 , Figure 4 is a structural diagram of a computer device provided in an optional embodiment of the present application, as shown in Figure 4As shown, the computer device includes one or more processors 10, memory 20, and interfaces 30 for external devices such as a keyboard and a mouse and a disk drive. One or more of the interfaces 30 enable a user to interact with the computer device. In some embodiments, the interface 30 also includes an input device, such as a microphone, or output device, such as a speaker. Figure 4 The processor 10 is used in the description as an example.

[0123] The processor 10 can be a central processing unit, a network processor, or a combination thereof. The processor 10 can further include a hardware chip. The hardware chip can be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device can be a complex programmable logic device, a field programmable logic device, a general array logic, or any combination thereof.

[0124] The memory 20 stores instructions that can be executed by the at least one processor 10 to cause the at least one processor 10 to perform the methods described in the above embodiments.

[0125] The memory 20 can include a program storage area and a data storage area. The program storage area can store an operating system, application programs, and the like for use by the at least one processor 10. The data storage area can store data created by the computer device, etc. Additionally, the memory 20 can include a volatile memory, such as a random access memory, and a non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid state storage device. In some embodiments, the memory 20 can optionally include a memory that is remote from the processor 10, such as a network storage device connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an enterprise intranet, a local area network, a mobile communication network, and a combination thereof.

[0126] The memory 20 can include a volatile memory, such as a random access memory, and a non-volatile memory, such as at least one disk storage device, flash memory, or other non-volatile solid state storage device.

[0127] The computer device also includes an input device 30 and an output device 40. The processor 10, the memory 20, the input device 30 and the output device 40 can be connected through a bus or other means, Figure 4 The bus connection is taken as an example.

[0128] The input device 30 can receive inputted digital or character information, and generate key signal input related to user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a trackpad, a touchpad, a pointing stick, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 can include a display device, an auxiliary lighting device (e.g., an LED), a tactile feedback device (e.g., a vibration motor), etc. The display device includes but is not limited to a liquid crystal display, a light-emitting diode, a display, and a plasma display. In some optional embodiments, the display device can be a touch screen.

[0129] The computer device also includes a communication interface 30 for communication of the computer device with other devices or communication networks.

[0130] The embodiments of the present application also provide a computer readable storage medium, and the method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or be implemented as computer code stored in a remote storage medium or a non-transitory machine readable storage medium and stored in a local storage medium to be downloaded through a network, so that the method described herein can be processed by such software on a storage medium using a general-purpose computer, a special-purpose processor, or programmable or special-purpose hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk or a solid-state disk, etc. Further, the storage medium can also include a combination of the above-mentioned types of memories. It can be understood that the computer, the processor, the microprocessor controller or the programmable hardware include a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, the processor or the hardware, the method shown in the above embodiments is implemented.

[0131] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, through the operation of the computer, can invoke or provide the method and / or technical solutions according to the present application. Those skilled in the art should understand that the form of computer program instructions in computer readable medium includes but is not limited to source files, executable files, installation package files and the like, and accordingly, the way of computer program instructions executed by computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0132] Although the embodiments of the present application are described in conjunction with the drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A method for regulating thermal runaway in an energy storage device, characterized in that, The method comprises: acquiring first parameters of each energy storage unit in an energy storage device group, the first parameters being parameters when the energy storage device group is normally working; dividing the energy storage units into a master unit and multiple slave units according to the first parameters; detecting thermal runaway of the energy storage device group; when detecting that the energy storage device group is about to have thermal runaway, adjusting parameters of the energy storage device group based on the first parameters and a specified charging and discharging efficiency to ensure the specified charging and discharging efficiency; when detecting that the master unit has thermal runaway, shutting down the energy storage device group; when detecting that the slave unit has thermal runaway, shutting down the slave unit having thermal runaway and adjusting parameters of the energy storage device group based on the specified charging and discharging efficiency to ensure the specified charging and discharging efficiency.

2. The energy storage device thermal runaway regulation method of claim 1, wherein, The first parameters include input voltage, discharging current, rated power and actual capacity, and the dividing of the energy storage units into a master unit and multiple slave units according to the first parameters comprises: acquiring actual capacity ratios of the energy storage units, determining a first unit having an actual capacity ratio greater than a first preset value, the actual capacity ratio being a ratio of actual capacity of an energy storage unit to capacity of the energy storage device group; acquiring input voltage, discharging current and rated power of the first unit, and taking the first unit having the highest input voltage, discharging current and rated power as the master unit and taking other units as the slave units.

3. The energy storage device thermal runaway regulation method of claim 1, wherein, The method further comprises, before the detecting of thermal runaway of the energy storage device group: acquiring a current specified charging and discharging efficiency of the energy storage device group; determining first safety parameters of the master unit and the slave units based on the specified charging and discharging efficiency and the first parameters, the first safety parameters being parameter ranges of the master unit and the slave units when working safely under standard conditions; The adjusting of parameters of the energy storage device group based on the first parameters and the specified charging and discharging efficiency when detecting that the energy storage device group is about to have thermal runaway comprises: adjusting parameters of the master unit and the slave units based on the specified charging and discharging efficiency and the first safety parameters when detecting that the energy storage device group is about to have thermal runaway.

4. The energy storage device thermal runaway regulation method of claim 3, wherein, The determining of the first safety parameter ranges of the master unit and the slave units based on the specified charging and discharging efficiency and the first parameters comprises: determining the first safety parameters of the master unit in the first parameters of the master unit according to a first preset ratio and determining the first safety parameters of the slave units in the first parameters of the slave units according to a second preset ratio; wherein the first preset ratio is less than the second preset ratio.

5. The energy storage device thermal runaway regulation method of claim 4, wherein, The adjusting of parameters of the master unit and the slave units based on the specified charging and discharging efficiency and the first safety parameters when detecting that the energy storage device group is about to have thermal runaway comprises: when detecting that the master unit is about to have thermal runaway, reducing input voltage and discharging current of the master unit and increasing input voltage and discharging current of the slave units based on the specified charging and discharging efficiency and the first safety parameters of the slave units; When it is detected that the slave unit is about to have thermal runaway, the input voltage and discharge current of the slave unit are reduced, and the input voltage and discharge current of the master unit are increased based on the specified charge-discharge efficiency and the first safety parameter of the master unit.

6. The energy storage device thermal runaway regulation method of claim 4, wherein, The parameter adjustment of the energy storage device group based on the specified charge-discharge efficiency when the slave unit has thermal runaway includes: obtaining an updated actual capacity ratio of the master unit in the updated energy storage device group, the actual capacity ratio being a ratio of the actual capacity of the master unit to the capacity of the energy storage device group; obtaining an increase ratio of the initial actual capacity ratio to the updated actual capacity ratio; decreasing the first safety parameter of the master unit according to the increase ratio to obtain a second safety parameter of the master unit, the second safety parameter of the master unit being a parameter range of the master unit in a safe working state under standard conditions; taking the first safety parameter of the slave unit as a second safety parameter of the updated slave unit, the second safety parameter of the updated slave unit being a parameter range of the updated slave unit in a safe working state under standard conditions; adjusting the parameters of the master unit and the updated slave unit based on the specified charge-discharge efficiency and the second safety parameter.

7. The energy storage device thermal runaway regulation method of any one of claims 1-6, wherein, The parameter adjustment of the energy storage device group includes: detecting an actual charge-discharge efficiency of the energy storage device group; calculating an efficiency ratio of the actual charge-discharge efficiency to the specified charge-discharge efficiency; when the efficiency ratio is less than a third preset ratio, shutting down the energy storage device group.

8. A computer device, comprising: including: a memory and a processor, which are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the energy storage device thermal runaway adjustment method in any one of claims 1 to 7.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for causing a computer to perform the energy storage device thermal runaway adjustment method in any one of claims 1 to 7.

10. A computer program product, characterised in that, including computer instructions for causing a computer to perform the energy storage device thermal runaway adjustment method in any one of claims 1 to 7.

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