Thermal runaway adjusting method and device for energy storage device, storage medium and program product

Abstract

The invention relates to the technical field of energy storage equipment, and discloses an energy storage equipment thermal runaway adjusting method and equipment, a storage medium and a program product, the energy storage equipment thermal runaway adjusting method comprises the following steps: obtaining a first parameter of each energy storage unit in an energy storage equipment group, the first parameter being a parameter when the energy storage equipment group works normally; dividing each energy storage unit into a master unit and a plurality of slave units according to the first parameter; performing thermal runaway detection on the energy storage equipment group; when it is detected that the thermal runaway of the energy storage device group is about to occur, parameter adjustment is conducted on the energy storage device group based on the first parameter and the specified charging and discharging efficiency; when the thermal runaway of the main unit is detected, closing the energy storage equipment group; and when it is detected that the slave units are subjected to thermal runaway, the slave units subjected to thermal runaway are closed, and parameter adjustment is performed on the energy storage equipment group based on the specified charging and discharging efficiency. The working efficiency of the energy storage equipment can be ensured while thermal runaway treatment is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of energy storage devices, and in particular to a method, device, storage medium and program product for regulating thermal runaway of energy storage devices. Background Art

[0002] The development trend of thermal runaway in energy storage is a complex and critical issue, involving multiple aspects such as battery technology, system design, and operating environment. With the widespread application of battery energy storage systems, the problem of thermal runaway has gradually received attention from the industry. It should be made clear that thermal runaway is a phenomenon in which the chemical reaction inside the battery gets out of control under certain conditions, such as high temperature, overcharging, internal short circuit, etc., generating a large amount of heat and possibly causing a fire. Therefore, for energy storage equipment, preventing and controlling thermal runaway is the key to ensuring system safety.

[0003] The suppression of thermal runaway in energy storage system batteries mainly includes determining the thermal runaway warning status of the battery and taking corresponding control measures according to the warning status. When the battery is in an uncontrollable state of thermal runaway, fire control will be taken to suppress thermal runaway, thereby quickly stabilizing the internal components of the battery, blocking the process of rapid release of chemical energy in a short period of time and generating a large amount of heat, and reducing the probability of thermal runaway.

[0004] At present, the operating status of energy storage equipment is detected in real time, and the battery cells are controlled at a reasonable temperature by thermal management devices. However, the working efficiency of the energy storage equipment cannot be guaranteed during the management process. Summary of the invention

[0005] In view of this, the present invention provides a method, device, storage medium and program product for regulating thermal runaway of an energy storage device, which can ensure the working efficiency of the energy storage device while achieving thermal runaway processing.

[0006] In a first aspect, the present invention provides a method for regulating thermal runaway of an energy storage device, the method comprising: obtaining a first parameter of each energy storage unit in an energy storage device group, the first parameter being a parameter when the energy storage device group is operating normally; dividing each energy storage unit into a master unit and a plurality of slave units according to the first parameter; 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, regulating the parameters of the energy storage device group based on the first parameter and a specified charge and 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 regulating the parameters of the energy storage device group based on the specified charge and discharge efficiency.

[0007] In this implementation, 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 parameters of each unit are adjusted according to the specified charge and discharge efficiency. Different priorities are set for the master unit and the slave unit. When thermal runaway occurs in the master unit, all energy storage units are shut down. When thermal runaway occurs in the slave unit, only the slave unit is shut down, thereby ensuring that other energy storage devices in a safe state continue to operate, so as to ensure the working efficiency of the energy storage device. This method can ensure the working efficiency of the energy storage device while achieving safe handling of thermal runaway.

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

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

[0010] In one implementation, before performing thermal runaway detection on an energy storage device group, the method includes: obtaining a current specified charge and discharge efficiency of the energy storage device group; determining a first safety parameter of a master unit and a slave unit based on the specified charge and discharge efficiency and a first parameter, the first safety parameter being a parameter range of the master unit and the slave unit when the master unit and the slave unit are operating safely under standard conditions; when it is detected that the energy storage device group is about to have thermal runaway, adjusting parameters of the energy storage device group based on the first parameter and the specified charge and discharge efficiency, including: when it is detected that the energy storage device group is about to have thermal runaway, adjusting parameters of the master unit and the slave unit based on the specified charge and discharge efficiency and the first safety parameter.

[0011] In this implementation, the first safety parameters for the operation of the master unit and the slave unit are determined, and the parameters are adjusted under the protection of the first safety parameters, so that the operation safety of the energy storage unit can be ensured while ensuring the charging efficiency.

[0012] In one implementation, determining the 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 ratio, and determining the first safety parameter of the slave unit in the first parameter of the slave unit according to a second preset ratio; wherein the first preset ratio is smaller than the second preset ratio.

[0013] In one implementation, when it is detected that the energy storage device group is about to have thermal runaway, the parameters of the master unit and the slave unit are adjusted based on the specified charge and discharge efficiency and the first safety parameter, including: when it is detected that the master unit is about to have thermal runaway, the input voltage and discharge current of the master unit are reduced, and based on the specified charge and discharge efficiency and the first safety parameter of the slave unit, the input voltage and discharge current of the slave unit are increased; 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 based on the specified charge and discharge efficiency and the first safety parameter of the master unit, the input voltage and discharge current of the master unit are increased.

[0014] In this implementation, while reducing the parameter data of the energy storage unit that is about to experience thermal runaway, the parameter data of the normally operating energy storage unit is increased according to the specified charge and discharge efficiency and the first safety parameter. This can reduce the temperature of the energy storage unit that is about to experience thermal runaway while ensuring the operating safety of the normally operating energy storage unit and the charge and discharge efficiency of the entire energy storage device group.

[0015] In one implementation, when thermal runaway of a slave unit is detected, the slave unit experiencing thermal runaway is shut down, and parameter adjustment of the energy storage device group is performed based on a specified charge and discharge efficiency, including: obtaining an updated actual capacity ratio of the master unit in the updated energy storage device group; obtaining an increase ratio from the initial actual capacity ratio to the updated actual capacity ratio; reducing a first safety parameter of the master unit according to the increase ratio to obtain a second safety parameter of the master unit; using the first safety parameter of the slave unit as a second safety parameter of the updated slave unit, the second safety parameter being a parameter range for safe operation of the master unit and the updated slave unit under standard conditions; and adjusting parameters of the master unit and the updated slave unit based on the specified charge and discharge efficiency and the second safety parameter.

[0016] In this implementation, after the slave unit is shut down, the entire energy storage device group undergoes an equipment update, and the second safety parameters of the master unit and the slave unit are reset based on the updated equipment status, 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 one implementation, after adjusting the parameters of the energy storage device group, the following steps are included: detecting the actual charging and discharging efficiency of the energy storage device group; calculating the efficiency ratio of the actual charging and discharging efficiency to the specified charging and discharging efficiency; and shutting down the energy storage device group when the efficiency ratio is less than a third preset ratio.

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

[0019] In a second aspect, the present invention provides a computer device, comprising: a memory and a processor, the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the thermal runaway regulation method for energy storage equipment according to the above-mentioned first aspect or any corresponding embodiment thereof by executing the computer instructions.

[0020] In a third aspect, the present invention provides a computer-readable storage medium having computer instructions stored thereon, the computer instructions being used to enable a computer to execute the method for regulating thermal runaway of an energy storage device according to the first aspect or any corresponding embodiment thereof.

[0021] In a fourth aspect, the present invention provides a computer program product, including computer instructions, which are used to enable a computer to execute the thermal runaway regulation method for energy storage equipment according to the first aspect or any corresponding embodiment thereof. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

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

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

[0025] Figure 3 is a structural block diagram of a thermal runaway regulating device for energy storage equipment according to an embodiment of the present invention;

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

[0027] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0028] According to an embodiment of the present invention, an embodiment of a method for regulating 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 regulating thermal runaway of an energy storage device is provided. Figure 1 is a flow chart of a method for regulating thermal runaway of an energy storage device according to an embodiment of the present invention. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 1 The process sequence shown is limited. Figure 1 As shown, the process includes the following steps:

[0030] Step S101, obtaining a first parameter of each energy storage unit in an energy storage device group.

[0031] Among them, the first parameter is the parameter when the energy storage device group works normally.

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

[0033] In one implementation, the first parameter includes input voltage, discharge current, rated power, actual capacity, and the like.

[0034] It is understandable that the energy storage unit devices are different, so the first parameter corresponding to each energy storage unit may be different. Exemplarily, the energy storage device group includes 3 energy storage units, wherein the rated power of energy storage unit 1 is 1KW-100KW, the rated power of energy storage unit 2 is 1KW-50KW, and the rated power of energy storage unit 3 is 1KW-10KW.

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

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

[0037] The master unit and the slave unit have different adjustment priorities. The master unit is monitored and adjusted in priority to ensure the normal operation of the energy storage device group's charging and discharging, and the slave unit is monitored and adjusted in auxiliary mode to cooperate with the operation of the master unit.

[0038] In one implementation, when parameter adjustment is required, the parameters of the master unit are adjusted first, and then based on the parameter adjustment ratio of the master unit, the parameters of the slave unit are adjusted accordingly to ensure the charging and discharging efficiency.

[0039] In one implementation, when the current ambient temperature is high or the charging and discharging demand is low, the slave unit is shut down first to avoid thermal runaway of the energy storage device group due to excessive temperature or excessive input voltage changes.

[0040] In one implementation, if the main unit has already experienced thermal runaway or is at risk of experiencing thermal runaway in a short period of time, the energy storage device group is directly shut down.

[0041] In one implementation, if one or more slave units have experienced thermal runaway or are at risk of experiencing thermal runaway in a short period of time, the slave unit is shut down or replaced with another slave unit according to the current charge and discharge demand. It is understandable that if the current charge and discharge demand is low and other energy storage units can meet the charge and discharge demand, the slave unit that has experienced thermal runaway is directly shut down; if the current charge and discharge demand is high and there is a slave unit in a shut-down state, the slave unit is replaced.

[0042] Step S103: perform thermal runaway detection on the energy storage device group.

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

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

[0045] Step S104: when it is detected that the energy storage device group is about to have thermal runaway, adjusting parameters of the energy storage device group based on the first parameter and the prescribed charge and discharge efficiency.

[0046] When it is detected that the energy storage device group is about to have thermal runaway, the energy storage unit having thermal runaway is determined, the operating parameters of the energy storage unit are lowered, and based on the first parameters of other energy storage units and the specified charge and discharge efficiency, the operating parameters of other energy storage units are increased while ensuring safe operation to ensure the specified charge and discharge efficiency.

[0047] Step S105, when it is detected that the main unit has thermal runaway, the energy storage device group is turned off.

[0048] Among them, the main unit has the highest priority. When thermal runaway of the main unit is detected, all energy storage units in the energy storage device group are directly shut down to stop the operation of the energy storage device group.

[0049] Step S106, when it is detected that a slave unit has thermal runaway, the slave unit having thermal runaway is turned off, and parameters of the energy storage device group are adjusted based on the specified charge and discharge efficiency.

[0050] Among them, the slave unit does not affect the operation of the master unit. When thermal runaway occurs in the slave unit, only the slave unit with thermal runaway is shut down. Further, based on the specified charge and discharge efficiency, parameters of the master unit and other slave units are adjusted to ensure the specified charge and discharge efficiency.

[0051] The thermal runaway regulation method for energy storage equipment 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. After thermal runaway detection, the parameters of each unit are adjusted according to the specified charge and discharge efficiency, and different priorities are set for the master unit and the slave unit. When thermal runaway occurs in the master unit, all energy storage units are shut down. When thermal runaway occurs in the slave unit, only the slave unit is shut down, thereby ensuring that other energy storage devices in a safe state continue to operate, so as to ensure the working efficiency of the energy storage device. This method can ensure the working efficiency of the energy storage device while achieving safe handling of thermal runaway.

[0052] In this embodiment, a method for regulating thermal runaway of an energy storage device is provided. Figure 2 is a flow chart of another method for regulating thermal runaway of an energy storage device according to an embodiment of the present invention. It should be noted that if there are substantially the same results, this embodiment is not limited to Figure 2 The process sequence shown is limited. Figure 2 As shown, the process includes the following steps:

[0053] Step S201, obtaining a first parameter of each energy storage unit in the energy storage device group.

[0054] For details, please see Figure 1 Step S101 of the illustrated embodiment will not be described in detail here.

[0055] Step S202: Divide each energy storage unit into a master unit and multiple slave units according to the first parameter.

[0056] Step S2021, dividing each energy storage unit into a master unit and multiple slave units.

[0057] Obtain the actual capacity ratio of each energy storage unit, determine the first unit whose actual capacity ratio is greater than the first preset value, obtain the input voltage, discharge current and rated power of the first unit, and take the first unit with the highest input voltage, the highest discharge current and the highest rated power as the main unit, and take the other units as slave units.

[0058] In one implementation, the first preset value is 50%. The energy storage unit with an actual capacity ratio greater than 50% and a maximum rated power, a maximum input voltage, and a maximum discharge current is used as the main unit.

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

[0060] In this implementation, the energy storage unit with the largest input voltage, discharge current, rated power and actual capacity is used as the master unit, so that parameter changes of the master unit have a greater impact on the entire energy storage device group, and parameter changes of the slave unit have a smaller impact on the entire energy storage device group, which can cope with different thermal runaway situations.

[0061] Step S2022, obtaining the current specified charging and discharging efficiency of the energy storage device group.

[0062] The charging and discharging efficiency is used to characterize the working efficiency of the energy storage device group and is an indicator data for reducing energy consumption.

[0063] In one implementation, the charge and discharge efficiency is energy efficiency ratio, charge rate per unit time, or discharge rate per unit time.

[0064] Step S2023: determining first safety parameters of the master unit and the slave unit based on the charge and discharge efficiency and the first parameter.

[0065] The first safety parameter is a parameter range when the master unit and the slave unit work safely under standard conditions. The first safety parameter includes a rated power range, an input voltage range, and a discharge current range.

[0066] The standard condition is a normal working environment, that is, 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.

[0067] The parameter range for safe operation refers to the rated power range, input voltage range and discharge current range of each energy storage unit in the energy storage device group when the requirements of the current system for the charging and discharging efficiency of the energy storage device group are met under standard conditions based on the rated power of the energy storage device group.

[0068] For the master unit, parameter changes and thermal runaway have a greater impact on the overall operation of the energy storage device group, and the parameter range for setting the master unit for safe operation accounts for a smaller proportion; while for the slave unit, parameter changes and thermal runaway have a smaller impact on the overall operation of the energy storage device group, and the parameter range for setting the slave unit for safe operation accounts for a larger proportion.

[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 ratio, and the first safety parameter of the slave unit is determined in the first parameter of the slave unit according to a second preset ratio, wherein the first preset ratio is smaller than the second preset ratio.

[0070] For example, in a normal working environment of 25-30 degrees Celsius, the current system input voltage is controlled at 500V-1000V, and the charge and discharge efficiency is set to more than 80%. On this basis, within the safe working range of the main 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 within 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 parameters for the operation of the master unit and the slave unit are determined, and the parameters are adjusted under the protection of the first safety parameters, so that the safety of the energy storage unit can be guaranteed while ensuring the charging efficiency.

[0072] Step S203: Perform thermal runaway detection on the energy storage device group.

[0073] For details, please see Figure 1 Step S103 of the illustrated embodiment will not be described in detail here.

[0074] Step S204: when it is detected that the energy storage device group is about to have thermal runaway, adjusting parameters of the energy storage device group based on the first parameter and the prescribed charge and discharge 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 discharge current exceeds the first safety parameter, it is considered that the energy storage unit is about to experience thermal runaway.

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

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

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

[0079] While ensuring the charging and discharging efficiency, the safety of the slave units is ensured by increasing the input voltage and discharge current of one or more slave units.

[0080] If after the above processing, the current temperature, temperature growth rate, and rated power of the main unit are within the first safety parameters, each energy storage unit will temporarily maintain its current working state and notify the staff to conduct risk detection and processing.

[0081] If after the above processing, the current temperature, temperature growth rate, and rated power of the main unit are not within the first safety parameters, and the slave unit cannot increase the parameter value, then continue to reduce the input voltage and discharge current value of the main unit, and determine whether the current energy storage device group can achieve the specified charging and discharging efficiency of 80%. If so, each energy storage unit will temporarily maintain the current working state, and notify the staff to conduct risk detection and processing; if not, shut down the current energy storage device group, and notify the staff to conduct risk detection and processing.

[0082] Step S2042, 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 based on the charge and discharge efficiency and the first safety parameter of the master unit, the input voltage and discharge current of the master unit are increased.

[0083] While ensuring the charging and discharging efficiency, the safety of the main unit is ensured, and the input voltage and discharge current of the main unit are increased.

[0084] If after the above processing, the current temperature, temperature growth rate, and rated power of the slave unit are within the first safety parameters, each energy storage unit will temporarily maintain its current working state and notify the staff to conduct risk detection and processing.

[0085] If after the above processing, the current temperature, temperature growth rate, and rated power of the slave unit are not within the first safety parameters, and the master unit cannot increase the parameter values, then continue to reduce the slave unit input voltage and discharge current values, and determine whether the current energy storage device group can achieve the required charging and discharging efficiency of 80%. If so, each energy storage unit will temporarily maintain its current working state, and notify the staff to conduct risk detection and processing; if not, shut down the current energy storage device group, and notify the staff to conduct risk detection and processing.

[0086] In this implementation, while reducing the parameter data of the energy storage unit that is about to experience thermal runaway, the parameter data of the normally operating energy storage unit is increased according to the specified charge and discharge efficiency and the first safety parameter. This can reduce the temperature of the energy storage unit that is about to experience thermal runaway while ensuring the operating safety of the normally operating energy storage unit and the charge and discharge efficiency of the entire energy storage device group.

[0087] Step S205: when it is detected that the main unit has thermal runaway, the energy storage device group is shut down.

[0088] If it is detected that the current parameters of the main unit exceed the first safety parameters or thermal runaway occurs, the energy storage device group is shut down.

[0089] Step S206, when it is detected that a slave unit has thermal runaway, the slave unit having thermal runaway is shut down, and parameters of the energy storage device group are adjusted.

[0090] If it is detected that the current parameter of the slave unit exceeds the first safety parameter or thermal runaway occurs, the slave unit in thermal runaway is shut down and the updated energy storage device group is readjusted.

[0091] Specifically, the above step S206 includes:

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

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

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

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

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

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

[0098] Step b3, reducing the first safety parameter of the main unit according to the increase ratio to obtain the second safety parameter of the main unit.

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

[0100] Exemplarily, after shutting down two slave units, 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%, while the initial actual capacity ratio is 55%. The increase ratio from the initial actual capacity ratio to the updated actual capacity ratio is calculated to be 5%. The first safety parameter range of each parameter of the master unit is reduced in the same proportion as a whole, such as reducing the input voltage and discharge current range by 5%. In one implementation, the minimum values ​​of the input voltage and discharge current are increased by 5%, and in another implementation, the maximum values ​​of the input voltage and discharge current are reduced by 5%. This application does not specifically limit the adjustment method.

[0101] In this implementation, after the slave unit is shut down, the entire energy storage device group undergoes an equipment update, and the second safety parameters of the master unit and the slave unit are reset based on the updated equipment status, 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] Step S2062: adjusting parameters of the master unit and the updated slave unit based on the charge and discharge efficiency and the second safety parameter.

[0103] When the current charging and discharging efficiency remains unchanged, the input voltage and the discharge current of the main unit are increased based on the second safety parameter.

[0104] If after the above processing, the energy storage device group reaches the current charging and discharging efficiency, each energy storage unit will temporarily maintain the current working state and notify the staff to conduct risk detection and processing; if it is not reached, and the input voltage and discharge current values ​​of the master unit reach the maximum value of the second safety parameter, the input voltage and discharge current values ​​of the remaining slave units will be increased until the requirements are met.

[0105] Furthermore, the actual charging and discharging efficiency of the energy storage device group is detected, and the efficiency ratio of the actual charging and discharging efficiency to the specified charging and discharging efficiency is calculated. When the efficiency ratio is less than a third preset ratio, the energy storage device group is turned off.

[0106] Specifically, if the input voltage and discharge current values ​​of the master unit and all slave units reach the maximum value of the second safety parameter, it is determined whether the actual charging and discharging efficiency of the current energy storage device group reaches 80% of the specified charging and discharging efficiency. If so, each unit temporarily maintains the current working state and notifies the staff to conduct risk detection and processing; if not, the current energy storage device group is shut down and the staff is notified to conduct risk detection and processing.

[0107] In this implementation, when the actual charging and discharging efficiency of the energy storage device group is low and the energy storage device group cannot normally complete the charging and discharging tasks, the energy storage device group is shut down to protect the energy storage device group and improve efficiency.

[0108] Furthermore, if the master unit cannot be adjusted to the second safety parameter after the slave unit is turned off, or the actual charging and discharging efficiency is lower than the threshold, the temperature, power, and SOC (State of Charge, the ratio of the remaining power of the battery to its rated capacity) of all current energy storage units are collected, combined with the current system operating temperature, input voltage and other parameters, and analyzed to find the cause of the abnormality 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. Different priorities are set for the master unit and the slave unit. When the master unit has thermal runaway, all energy storage units are shut down. When the slave unit has thermal runaway, only the slave unit is shut down, thereby ensuring 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, while reducing the parameter data of the energy storage unit that is about to have thermal runaway, according to the specified charge and discharge efficiency and the first safety parameter, the parameter data of the normally operating energy storage unit is increased, so that the operating safety of the normally operating energy storage unit and the charge and discharge efficiency of the entire energy storage device group can be ensured while reducing the temperature of the energy storage unit that is about to have thermal runaway.

[0110] At the same time, the present application proposes a method for adjusting the safety parameter range. After the equipment in the energy storage device group is 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 guarantee the specified charging and discharging efficiency and better protect the master unit and the remaining slave units.

[0111] In this embodiment, a thermal runaway regulating device for energy storage equipment is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. As used below, the term "module" can implement a combination of software and / or hardware of a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0112] This embodiment provides a thermal runaway control device for energy storage equipment, such as Figure 3 As shown, Figure 3 is a structural block diagram of a thermal runaway regulating device for energy storage equipment according to an embodiment of the present invention, the thermal runaway regulating device for energy storage equipment comprising:

[0113] The acquisition module 301 is used to acquire a first parameter of each energy storage unit in the energy storage device group, where the first parameter is a parameter when the energy storage device group works normally.

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

[0115] The detection module 303 is used to perform thermal runaway detection on the energy storage device group.

[0116] A first adjustment module 304 is used to adjust the parameters of the energy storage device group based on the first parameter and the specified charge and discharge efficiency when it is detected that the energy storage device group is about to have thermal runaway;

[0117] The second regulating module 305 is used to shut down the energy storage device group when thermal runaway of the main unit is detected.

[0118] The third regulating module 306 is used to shut down the slave unit that has thermal runaway when it is detected that the slave unit has thermal runaway, and to adjust parameters of the energy storage device group based on the specified charging and discharging efficiency.

[0119] The further functional description of each of the above modules is the same as that of the above corresponding embodiments and will not be repeated here.

[0120] The thermal runaway regulation device for energy storage equipment in this embodiment is presented in the form of a functional unit, where the unit refers to an ASIC (Application Specific Integrated Circuit) circuit, a processor and memory that executes one or more software or fixed programs, and / or other devices that can provide the above functions.

[0121] The embodiment of the present invention also provides a computer device having the above Figure 3 The thermal runaway control device of the energy storage device is shown.

[0122] See also Figure 4 , Figure 4 is a schematic diagram of the structure of a computer device provided by an optional embodiment of the present invention, such as Figure 4As shown, the computer device includes: one or more processors 10, a memory 20, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. Various components are connected to each other using different buses for communication, and can be installed on a common mainboard or installed in other ways as needed. The processor can process the instructions executed in the computer device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as, a display device coupled to the interface). In some optional embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple computer devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Figure 4 A processor 10 is taken as an example.

[0123] The processor 10 may be a central processing unit, a network processor or a combination thereof. The processor 10 may further include a hardware chip. The hardware chip may be a dedicated integrated circuit, a programmable logic device or a combination thereof. The programmable logic device may be a complex programmable logic device, a field programmable gate array, a general purpose array logic or any combination thereof.

[0124] The memory 20 stores instructions executable by at least one processor 10, so that the at least one processor 10 executes the method shown in the above embodiment.

[0125] The memory 20 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the computer device, etc. In addition, the memory 20 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some optional embodiments, the memory 20 may optionally include a memory remotely arranged relative to the processor 10, and these remote memories may be connected to the computer device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0126] The memory 20 may include a volatile memory, such as a random access memory; the memory may also include a non-volatile memory, such as a flash memory, a hard disk or a solid state drive; the memory 20 may also include a combination of the above types of memory.

[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 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0128] The input device 30 can receive input digital or character information, and generate key signal input related to the user settings and function control of the computer device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick, etc. The output device 40 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The above-mentioned 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 further comprises a communication interface 30 for the computer device to communicate with other devices or a communication network.

[0130] The embodiment of the present invention also provides a computer-readable storage medium. The method according to the embodiment of the present invention can be implemented in hardware, firmware, or can be implemented as a computer code that can be recorded in a storage medium, or can be implemented as a computer code that is originally stored in a remote storage medium or a non-temporary machine-readable storage medium and will be stored in a local storage medium through a network download, so that the method described herein can be stored in such software processing on a storage medium using a general-purpose computer, a dedicated processor, or programmable or dedicated hardware. Among them, the storage medium can be a magnetic disk, an optical disk, a read-only storage memory, a random access memory, a flash memory, a hard disk or a solid-state hard disk, etc.; further, the storage medium can also include a combination of the above types of memories. It can be understood that a computer, a processor, a microprocessor controller, or programmable hardware includes a storage component that can store or receive software or computer code. When the software or computer code is accessed and executed by a computer, a processor, or hardware, the method shown in the above embodiment is implemented.

[0131] A part of the present invention may be applied as a computer program product, such as a computer program instruction, which, when executed by a computer, can call or provide the method and / or technical solution according to the present invention through the operation of the computer. Those skilled in the art should understand that the existence of the computer program instruction in a computer-readable medium includes, but is not limited to, a source file, an executable file, an installation package file, etc., and accordingly, the way in which the computer program instruction is executed by the computer includes, but is not limited to: the computer directly executes the instruction, or the computer compiles the instruction and then executes the corresponding compiled program, or the computer reads and executes the instruction, or the computer reads and installs the instruction and then executes the corresponding installed program. Here, the computer-readable medium may be any available computer-readable storage medium or communication medium accessible to the computer.

[0132] Although the embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A method for regulating thermal runaway of energy storage equipment, characterized in that: The method comprises: Acquire a first parameter of each energy storage unit in the energy storage device group, where the first parameter is a parameter of the energy storage device group when it is working normally; Dividing the energy storage units into a master unit and a plurality of slave units according to the first parameter; 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, adjusting parameters of the energy storage device group based on the first parameter and the specified charge and discharge efficiency; When thermal runaway of the main unit is detected, shutting down the energy storage device group; When it is detected that the slave unit has thermal runaway, the slave unit having thermal runaway is shut down, and parameters of the energy storage device group are adjusted based on the specified charge and discharge efficiency.

2. The method for regulating thermal runaway of energy storage equipment according to claim 1, characterized in that: The first parameters include input voltage, discharge current, rated power and actual capacity, and the dividing of the energy storage units into a master unit and a plurality of slave units according to the first parameters includes: Obtaining an actual capacity ratio of each of the energy storage units, and determining a first unit whose actual capacity ratio is greater than a first preset value; The input voltage, discharge current and rated power of the first unit are obtained, and the first unit with the highest input voltage, the highest discharge current and the highest rated power is used as the master unit, and the other units are used as the slave units.

3. The method for regulating thermal runaway of energy storage equipment according to claim 1, characterized in that: The step of performing thermal runaway detection on the energy storage device group includes: Obtaining the current specified charging and discharging efficiency of the energy storage device group; Determine a first safety parameter of the master unit and the slave unit based on the specified charge and discharge efficiency and the first parameter, wherein the first safety parameter is a parameter range of the master unit and the slave unit when they work safely under standard conditions; 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 charge and discharge efficiency includes: When it is detected that the energy storage device group is about to have thermal runaway, parameters of the master unit and the slave unit are adjusted based on the specified charge and discharge efficiency and the first safety parameter.

4. The method for regulating thermal runaway of energy storage equipment according to claim 3, characterized in that: The determining of the first safety parameter range of the master unit and the slave unit based on the specified charge and discharge efficiency and the first parameter comprises: Determine the first safety parameter of the master unit from the first parameter of the master unit according to a first preset ratio, and determine the first safety parameter of the slave unit from the first parameter of the slave unit according to a second preset ratio; Wherein, the first preset ratio is smaller than the second preset ratio.

5. The method for regulating thermal runaway of energy storage equipment according to claim 4, characterized in that: 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 charge and discharge efficiency and the first safety parameter includes: When it is detected that the master unit is about to have thermal runaway, the input voltage and discharge current of the master unit are reduced, and based on the specified charge and discharge efficiency and the first safety parameter of the slave unit, the input voltage and discharge current of the slave unit are increased; 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 based on the specified charge and discharge efficiency and the first safety parameter of the master unit, the input voltage and discharge current of the master unit are increased.

6. The method for regulating thermal runaway of energy storage equipment according to claim 4, characterized in that: When the slave unit is detected to have thermal runaway, shutting down the slave unit having thermal runaway, and adjusting parameters of the energy storage device group based on the specified charge and discharge efficiency include: Obtaining an updated actual capacity proportion of the master unit in the updated energy storage device group; Obtaining an increase ratio from the initial actual capacity ratio to the updated actual capacity ratio; reducing the first safety parameter of the main unit according to the increase ratio to obtain a second safety parameter of the main unit; Using the first safety parameter of the slave unit as the second safety parameter of the updated slave unit, wherein the second safety parameter is a parameter range when the master unit and the updated slave unit work safely under standard conditions; Parameters of the master unit and the updated slave unit are adjusted based on the prescribed charge and discharge efficiency and the second safety parameter.

7. The method for regulating thermal runaway of an energy storage device according to any one of claims 1 to 6, characterized in that: The step of adjusting the parameters of the energy storage device group includes: Detecting the actual charging and discharging efficiency of the energy storage device group; Calculating the efficiency ratio of the actual charging and discharging efficiency to the specified charging and discharging efficiency; When the efficiency ratio is less than a third preset ratio, the energy storage device group is turned off.

8. A computer device, characterized in that: include: A memory and a processor, wherein the memory and the processor are communicatively connected to each other, the memory stores computer instructions, and the processor executes the thermal runaway regulation method for energy storage equipment according to any one of claims 1 to 7 by executing the computer instructions.

9. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a computer to execute the thermal runaway regulation method for energy storage equipment according to any one of claims 1 to 7.

10. A computer program product, characterized in that It comprises computer instructions, and the computer instructions are used to enable a computer to execute the thermal runaway regulation method for energy storage equipment according to any one of claims 1 to 7.

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