Energy storage battery passive safety protection device, method, equipment, storage medium and program product applied to energy storage power station

Abstract

The present application relates to a passive safety protection device, method, equipment, storage medium and program product for energy storage batteries. The device includes a battery compartment for placing energy storage batteries; an inert gas generator connected to the battery compartment for filling the battery compartment with inert gas, wherein the inert gas is used to regulate the environmental parameters in the battery compartment; and an environmental parameter detector for issuing a safety alarm when the environmental parameter value in the battery compartment is detected to exceed a preset environmental parameter value range. The use of this method can reduce the safety risk of energy storage batteries.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a passive safety protection device, method, equipment, storage medium and program product for energy storage batteries applied to energy storage power stations. Background Art

[0002] With the rapid development of new energy technologies, the production and sales of lithium-ion batteries are increasing, and more and more lithium-ion batteries are entering their service life or even retirement period. The cascade utilization of power batteries has become a key task that must be solved by my country's lithium battery industry. Energy storage power stations are a major scenario for the cascade utilization of power batteries. However, the current application of cascade utilization batteries in my country's energy storage field is still relatively limited. The main reason is that lithium-ion batteries have relatively high safety risks and are prone to thermal runaway and spontaneous combustion. And as the service time of the battery increases, the risk of thermal runaway of the battery increases significantly.

[0003] In traditional technology, active safety protection is usually adopted, using big data and algorithm models to form a strict monitoring network to provide early warning and processing before the battery catches fire or spontaneous combustion. At the same time, energy storage batteries are equipped with fire-fighting equipment as a passive protection measure.

[0004] However, the battery fire and spontaneous combustion process is usually very rapid, and the temperature can rise by several hundred degrees in just a dozen seconds. Active safety protection methods are usually difficult to accurately identify and respond to in such a short time, resulting in a high probability of risk occurrence. Passive protection methods can only control the scope of risk occurrence as much as possible and reduce losses after the risk occurs, but cannot prevent the risk from occurring. In other words, traditional safety protection methods still have high safety risks. Summary of the invention

[0005] Based on this, it is necessary to provide a passive safety protection device, method, equipment, storage medium and program product for energy storage batteries applied to energy storage power stations, which can reduce the safety risks of energy storage batteries in response to the above technical problems.

[0006] In a first aspect, the present application provides a passive safety protection device for an energy storage battery applied to an energy storage power station, the device comprising:

[0007] A battery compartment, used to place energy storage batteries;

[0008] an inert gas generator, connected to the battery compartment, and used to fill the battery compartment with inert gas, wherein the inert gas is used to regulate environmental parameters in the battery compartment;

[0009] The environmental parameter detector is used to issue a safety alarm when it detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range.

[0010] In one embodiment, the environmental parameter value includes at least one of an inert gas concentration value, an ambient temperature value, and an ambient pressure value, and the environmental parameter detector includes at least one of an inert gas detector, an ambient temperature detector, and an ambient pressure detector, wherein:

[0011] The inert gas detector is used to issue a safety alarm when it detects that the inert gas concentration value in the battery compartment is lower than a preset concentration threshold;

[0012] The ambient temperature detector is used to issue a safety alarm when it detects that the ambient temperature value in the battery compartment is higher than a preset ambient temperature threshold;

[0013] The ambient air pressure detector is used to issue a safety alarm when it detects that the ambient air pressure value in the battery compartment is lower than a preset first ambient air pressure threshold or higher than a preset second ambient air pressure threshold, wherein the first ambient air pressure threshold is smaller than the second ambient air pressure threshold.

[0014] In one embodiment, the device includes multiple inert gas detection groups, each inert gas detection group includes at least one inert gas detector, the distances between the inert gas detectors belonging to the same inert gas detection group and the gas release holes of the inert gas generator are equal, and the distances between the inert gas detectors belonging to different inert gas detection groups and the gas release holes of the inert gas generator are unequal.

[0015] In one of the embodiments, the concentration threshold corresponding to the inert gas detector is negatively correlated with the distance between the inert gas detector and the gas release hole.

[0016] In one embodiment, the inert gas generator includes a generator body and an inert gas pipeline, a plurality of gas release holes are opened on the tube wall of the inert gas pipeline, and the inlet end of the inert gas pipeline is connected to the generator body, so as to fill the inert gas in the generator body into the battery compartment through the gas release holes and the outlet end of the inert gas pipeline.

[0017] In one of the embodiments, the device further includes a pressure relief valve, which is disposed on the compartment body of the battery compartment and is used to discharge the gas in the battery compartment when the pressure relief valve is in an open state.

[0018] In a second aspect, the present application further provides a passive safety protection method for an energy storage battery applied to an energy storage power station, which is applied to a passive safety protection device for an energy storage battery applied to an energy storage power station, wherein the passive safety protection device for an energy storage battery applied to an energy storage power station comprises a battery compartment, an inert gas generator and an environmental parameter detector, wherein the inert gas generator is connected to the battery compartment; the method comprises:

[0019] When it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through the inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment;

[0020] When the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued.

[0021] In a third aspect, the present application further provides a computer device, which is applied to a passive safety protection device for an energy storage battery applied to an energy storage power station, wherein the passive safety protection device for an energy storage battery applied to an energy storage power station comprises a battery compartment, an inert gas generator, and an environmental parameter detector, wherein the inert gas generator is connected to the battery compartment; the computer device comprises a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0022] When it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through the inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment;

[0023] When the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued.

[0024] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, which is applied to a passive safety protection device for an energy storage battery applied to an energy storage power station, wherein the passive safety protection device for an energy storage battery applied to an energy storage power station comprises a battery compartment, an inert gas generator, and an environmental parameter detector, wherein the inert gas generator is connected to the battery compartment, and when the computer program is executed by a processor, the following steps are implemented:

[0025] When it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through the inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment;

[0026] When the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued.

[0027] In a fifth aspect, the present application further provides a computer program product, including a computer program, applied to a passive safety protection device for an energy storage battery applied to an energy storage power station, wherein the passive safety protection device for an energy storage battery applied to an energy storage power station comprises a battery compartment, an inert gas generator, and an environmental parameter detector, wherein the inert gas generator is connected to the battery compartment, and when the computer program is executed by a processor, the following steps are implemented:

[0028] When it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through the inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment;

[0029] When the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued.

[0030] The above-mentioned energy storage battery passive safety protection device, method, equipment, storage medium and program product applied to energy storage power stations, on the one hand, through the inert gas generator, the inert gas is filled into the battery compartment, so that the energy storage battery is in an inert gas environment, even if the temperature of the energy storage battery reaches the ignition point, since the inert gas cannot burn, the energy storage battery will not catch fire, spontaneous combustion and other phenomena, so it can prevent the occurrence of risks such as fire and spontaneous combustion from the source, and effectively reduce the harm and loss to the energy storage battery itself and other objects and personnel; on the other hand, through the environmental parameter detector, the environmental conditions in the battery compartment can be monitored, and when the environmental parameter value in the battery compartment is detected to exceed the preset environmental parameter value range, a safety alarm is issued, so that the relevant objects can be handled in time, reducing the safety risk of the energy storage battery. In this way, since the risk of fire of the energy storage battery is low, the battery life can be extended, and the full cascade utilization of old batteries is achieved, which is conducive to promoting the recycling of batteries and the development of the energy storage industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1A schematic diagram of component modules of a passive safety protection device for energy storage batteries used in an energy storage power station in one embodiment;

[0033] Figure 2 A schematic diagram of component modules of a passive safety protection device for energy storage batteries used in energy storage power stations, in which a plurality of inert gas detection groups are provided in one embodiment;

[0034] Figure 3 A schematic diagram of component modules of a passive safety protection device for energy storage batteries used in an energy storage power station and provided with an inert gas pipeline in one embodiment;

[0035] Figure 4 is a schematic structural diagram of an inert gas pipeline in one embodiment;

[0036] Figure 5 It is a schematic diagram of the component modules of a passive safety protection device for energy storage batteries used in an energy storage power station and provided with a pressure relief valve in one embodiment;

[0037] Figure 6 It is a schematic flow chart of a passive safety protection method for energy storage batteries applied to an energy storage power station in one embodiment;

[0038] Figure 7 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0039] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. Embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present invention more thorough and comprehensive.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0041] It is understood that the terms "first", "second", etc. used in the present invention may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor without departing from the scope of the present invention. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0042] It can be understood that the “connection” in the following embodiments should be understood as “connected”, “communication connection”, etc., if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0043] It can be understood that “at least one” means one or more, “plurality” means two or more, and “at least a portion of an element” means a part or all of an element.

[0044] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0045] In an exemplary embodiment, Figure 1 As shown, a passive safety protection device for energy storage batteries applied to an energy storage power station is provided, and the device includes a battery compartment 102 , an inert gas generator 104 and an environmental parameter detector 106 .

[0046] It should be noted that my country currently ranks first in the world in terms of production and sales of lithium-ion batteries. As of now, the number of new energy vehicles in service in China has reached 17 million, and a large number of lithium-ion batteries have entered the service period or even the retirement period. The cascade utilization of power batteries has become a key task that must be solved by my country's lithium battery industry. Energy storage power stations are a major scenario for the cascade utilization of power batteries. Disassembling new energy vehicle power batteries that cannot meet high energy density application scenarios and using them in energy storage scenarios with relatively low energy density requirements is a major means of realizing the cascade utilization of batteries. However, the current application of cascade utilization batteries in my country's energy storage field is still relatively limited. The main reason is that the safety hazards of lithium-ion batteries are relatively high. Under the current material structure system, lithium-ion batteries are prone to thermal runaway and spontaneous combustion, causing fires. And as the service time of the battery increases, the risk of thermal runaway of the battery increases.

[0047] In traditional technology, active safety protection is usually combined with fire-fighting equipment as a passive protection method. Active safety mainly uses sensors to deploy around the energy storage battery, and uses big data and algorithm models to form a strict monitoring network to promptly warn and handle the battery before it catches fire or spontaneously combusts, so as to avoid serious consequences. However, since the battery's ignition and spontaneous combustion process is usually rapid, the temperature can rise by 100 degrees in just a dozen seconds. Therefore, the technical difficulty of active protection is relatively high. From the perspective of potential safety hazards that need to be protected, the current active safety technology for energy storage batteries generally has problems such as low accuracy, high false alarm rate, and long delay time, making it difficult to achieve high-precision control. Passive protection methods can only control the scope of risk as much as possible and reduce losses after the risk occurs, but cannot prevent the risk from occurring. Once the battery catches fire and burns, it will cause irreversible damage to the entire electrical system.

[0048] Among them, the battery compartment 102 refers to a compartment structure for placing energy storage batteries. In a feasible implementation, the battery compartment 102 is a sealable battery compartment 102. The sealable battery compartment 102 refers to a battery compartment 102 that can be sealed. It can be understood that the battery compartment 102 can be provided with a door, a pipe opening, a passage and other openings connected to the outside on the compartment body. By arranging an opening and closing control device at the opening, such as a switch, a gate, a valve, etc., the sealing state of the battery compartment 102 can be adjusted.

[0049] The inert gas generator 104 refers to a device capable of transmitting inert gas to the outside. The inert gas generator 104 is connected to the battery compartment 102, so that the inert gas can be filled into the battery compartment 102. The number of inert gas generators 104 can be one or more. The inert gas is usually compressed and stored in the inert gas generator 104. The compressed inert gas can be liquid. When the compressed inert gas is released, it usually has properties such as high pressure, low temperature and inertness. Environmental parameters such as ambient air pressure, ambient temperature and gas composition in the battery compartment can be regulated. As an example, the inert gas can be nitrogen. The inert gas generator 104 may be provided with at least one of an inert gas storage unit, an inert gas preparation unit and an inert gas acquisition unit, wherein the inert gas storage unit has the function of storing inert gas, and the inert gas generator 104 can transfer the inert gas stored in the inert gas storage unit to the battery compartment 102; the inert gas preparation unit has the function of preparing inert gas, and the inert gas generator 104 can transfer the inert gas prepared by the inert gas preparation unit to the battery compartment 102; the inert gas acquisition unit has the function of transmitting inert gas, and the inert gas generator 104 can obtain inert gas from other inert gas preparation devices through the inert gas acquisition unit, thereby transmitting the obtained inert gas to the battery compartment 102. It is understandable that during the use of the energy storage battery, the inert gas generator 104 can be turned on all the time, turned on at a fixed time, or turned on in a triggered manner. That is, before the energy storage battery is used, the inert gas generator 104 can be turned on first, the atmosphere in the battery compartment 102 can be adjusted to the required inert gas environment, and then the energy storage battery can be enabled. After the energy storage battery is enabled, the inert gas generator 104 can be turned off or not. After turning off the inert gas generator 104, the inert gas generator 104 can also be turned on in a fixed time or in a triggered manner.

[0050] The environmental parameter detector 106 is a device for monitoring environmental parameters. The environmental parameter detector 106 can monitor whether the environmental parameter value of the environment in the battery compartment 102 is within a preset environmental parameter value range, and can also issue a safety alarm when the environmental parameter value is not within the preset environmental parameter value range. The number of environmental parameter detectors 106 can be one or more. In a feasible embodiment, the environmental parameter detector 106 may include a detector body and a data acquisition device. For example, the data acquisition device may be a sensor; wherein the data acquisition device is arranged in the battery compartment 102, and is used to collect the environmental parameter values ​​of the environment in the battery compartment 102. The data acquisition device is connected to the detector body in a wired or wireless manner to communicate with the detector body, thereby sending the collected environmental parameter values ​​to the detector body; the detector body may be arranged in the battery compartment 102 or outside the battery compartment 102, and is used to detect whether the environmental parameter value sent by the data acquisition device is within a preset environmental parameter value range, and when it is detected that the environmental parameter value is not within the preset environmental parameter value range, a security alarm is issued. For example, the detector body may be a management terminal or a user terminal of a manager arranged outside the battery compartment 102; in a feasible embodiment, the environmental parameter detector 106 may also include an alarm. When the detector body detects that the environmental parameter value is not within the preset environmental parameter value range, the detector body sends an alarm instruction to the alarm, and the alarm issues a security alarm in response to the alarm instruction to attract the attention of relevant personnel and deal with possible risks in a timely manner.

[0051] As an example, the energy storage battery that needs to be protected can be placed in the battery compartment 102 by a user, a robot, a robotic arm or a conveyor belt; further, the inert gas generator 104 and the environmental parameter detector 106 can be triggered and activated after detecting that the energy storage battery is placed in the battery compartment 102, or the inert gas generator 104 and the environmental parameter detector 106 can be activated when needed by the user, the robot or the terminal device; when the inert gas generator 104 is activated, the battery compartment 102 can be filled with inert gas to create an inert atmosphere environment for the energy storage battery. In this way, when the external environment temperature is too high or the energy storage battery heats up due to excessive load, Low-temperature inert gas can effectively suppress the increase in temperature inside and outside the energy storage battery, thereby reducing the damage caused by high temperature to the energy storage battery. Even if the energy storage battery encounters abnormal conditions such as short circuit, overcurrent, high temperature, etc. during operation, the inert gas is chemically inactive and not easy to react with other substances, which can effectively prevent the energy storage battery from spontaneous combustion or fire. Simultaneously, when the environmental parameter detector 106 is enabled, it can monitor in real time or at regular intervals whether the environmental parameter value of the environment in the battery compartment 102 is within the preset environmental parameter value range. If the environmental parameter value in the battery compartment 102 is detected to exceed the preset environmental parameter value range, a safety alarm is issued to remind relevant personnel to deal with possible risks in a timely manner.

[0052] As an example, after the energy storage battery is placed in the battery compartment 102, before the energy storage system starts working, the environmental parameters in the battery compartment 102 can be regulated by the inert gas generator 104. When it is detected that the environmental parameter value in the battery compartment 102 meets the preset working conditions, the transmission channel between the inert gas generator 104 and the battery compartment 102 can be closed, the inert gas generator 104 is suspended from passing the inert gas into the battery compartment 102, and the battery compartment 102 is placed in a sealed state; then, the energy storage system can be enabled, the energy storage battery starts working, and the inert gas generator 104 can be turned on synchronously. The environmental parameter detector 106 monitors the environmental parameters in the battery compartment. When the energy storage battery is operating normally, the energy storage battery in the battery compartment 102 can operate normally under the protection of an inert atmosphere. If the energy storage battery has an abnormal condition, such as a short circuit, high temperature, etc., it may cause the ambient temperature and ambient air pressure in the battery compartment 102 to change, and other gases may be generated, changing the concentration of the inert gas in the battery compartment 102. Therefore, when the environmental parameter value in the battery compartment 102 monitored by the environmental parameter detector 106 exceeds the preset environmental parameter value range, a safety alarm is issued.

[0053] It is understandable that the inert gas generator and the environmental parameter detector can be turned on simultaneously or one after the other.

[0054] In the above-mentioned passive safety protection device for energy storage batteries used in energy storage power stations, on the one hand, an inert gas is filled into the battery compartment 102 through the inert gas generator 104, so that the energy storage battery is in an inert gas environment. Even if the temperature of the energy storage battery reaches the ignition point, since the inert gas cannot burn, the energy storage battery will not catch fire or self-ignite. Therefore, the risk of fire and self-ignition can be prevented from the source, effectively reducing the harm and loss to the energy storage battery itself and other objects and personnel; on the other hand, the environmental parameter detector 106 can be used to monitor the environmental conditions in the battery compartment 102. When the environmental parameter value in the battery compartment 102 is detected to exceed the preset environmental parameter value range, a safety alarm is issued so that the relevant objects can be handled in time to reduce the safety risk of the energy storage battery. In this way, since the risk of fire of the energy storage battery is low, the service life of the battery can be extended, and the full cascade utilization of old batteries is achieved, which is conducive to promoting the recycling of batteries and the development of the energy storage industry.

[0055] In an exemplary embodiment, the environmental parameter value includes at least one of an inert gas concentration value, an ambient temperature value, and an ambient pressure value, and the environmental parameter detector includes at least one of an inert gas detector, an ambient temperature detector, and an ambient pressure detector, wherein:

[0056] An inert gas detector refers to a device capable of detecting the inert gas concentration value in an environment. The environmental parameter value includes the inert gas concentration value. The environmental parameter value range includes a concentration threshold greater than or equal to a preset concentration threshold. As an example, the inert gas detector can collect a certain amount of ambient gas, and then detect the amount of inert gas in the ambient gas, and determine the concentration of the inert gas in the environment according to the ratio of the amount of inert gas to the amount of ambient gas. If the detected inert gas concentration value is lower than the preset concentration threshold, it means that an abnormal atmosphere may have occurred in the battery compartment 102. For example, the energy storage battery produces other gases due to electrolyte decomposition, chemical reactions, etc., the air tightness of the battery compartment 102 is reduced, etc., the energy storage battery electrolyte decomposition, chemical reactions, etc., the surface energy storage battery fails, which will have an adverse effect on the normal operation of the energy storage and the service life of the energy storage battery. The reduced air tightness will cause the inert gas to leak out of the battery compartment 102 and the air outside the battery compartment 102 will enter. The entry of air will increase the risk of fire in the battery compartment 102. Therefore, a safety alarm needs to be issued to remind relevant personnel to deal with the abnormal atmosphere in time; if the detected inert gas concentration value is greater than or equal to the preset concentration threshold, it means that the atmosphere in the battery compartment 102 is normal and no safety alarm is required.

[0057] In a feasible implementation, the battery compartment may be a rectangular parallelepiped structure, and an inert gas detector may be provided at each top corner and bottom corner of the battery compartment, so as to improve the comprehensiveness of the inert gas monitoring in the battery compartment.

[0058] The ambient temperature detector refers to a device capable of detecting ambient temperature, and the ambient parameter value includes an ambient temperature value, and the ambient parameter value range includes less than or equal to a preset ambient temperature threshold, wherein the ambient temperature threshold can be determined according to actual conditions and test results, such as 35°C, 40°C, 45°C, etc., and can also be adjusted according to the external ambient temperature, such as 35°C in winter, 40°C in spring and autumn, and 45°C in summer, etc., which is not limited in this embodiment. In a feasible implementation, the ambient temperature detector includes an infrared temperature detector. As an example, the ambient temperature detector can collect the ambient temperature value of the environment in the battery compartment 102, and compare the numerical value relationship between the ambient temperature value and the ambient temperature threshold. If the ambient temperature value is detected to be higher than the preset ambient temperature threshold, it means that the battery compartment 102 may have a temperature abnormality, such as the thermal insulation performance of the battery compartment 102 is reduced, the temperature of the energy storage battery is abnormally increased, etc., so a safety alarm needs to be issued to remind relevant personnel to deal with the temperature abnormality in time; if the ambient temperature value is detected to be less than or equal to the preset ambient temperature threshold, it means that the ambient temperature in the battery compartment 102 is normal, and no safety alarm is required.

[0059] In one feasible implementation, the ambient temperature detector can be set at the geometric center of the space area in the battery compartment. If the temperature detector cannot be set at the geometric center, it can be set at the position closest to the geometric center to improve the accuracy of ambient temperature monitoring.

[0060] An ambient pressure detector refers to a device capable of detecting ambient pressure, wherein the ambient parameter value includes an ambient pressure value, wherein the ambient parameter value range includes a value greater than or equal to a preset first ambient pressure threshold and less than or equal to a preset second ambient pressure threshold, wherein the first ambient pressure threshold is less than the second ambient pressure threshold, and the first ambient pressure threshold and the second ambient pressure threshold can be determined based on actual conditions and test results, etc. For example, the first ambient pressure threshold can be 1.1 MPa, and the second ambient pressure threshold can be 2.0 MPa, and this embodiment does not impose any restrictions on this. As an example, the inert gas detector can collect the ambient air pressure value in the battery compartment 102. If the detected ambient air pressure value is lower than the preset first ambient air pressure threshold, it means that a low pressure abnormality may have occurred in the battery compartment 102, for example, the air tightness of the battery compartment 102 is reduced. The reduced air tightness will cause the inert gas to leak out of the battery compartment 102 and the air outside the battery compartment 102 to enter. The entry of air will increase the risk of fire in the battery compartment 102. Therefore, it is necessary to issue a safety alarm to remind relevant personnel to deal with the low pressure abnormality in time; if the detected ambient air pressure value is higher than the preset second ambient air pressure threshold, it means that a high pressure abnormality may have occurred in the battery compartment 102. When the battery compartment 102 is in a sealed state, if the air pressure is too high, it may cause an explosion. Therefore, it is necessary to issue a safety alarm to remind relevant personnel to deal with the high pressure abnormality in time; if the detected ambient air pressure value is greater than or equal to the preset first ambient air pressure threshold and less than or equal to the preset second ambient air pressure threshold, it means that the ambient air pressure in the battery compartment 102 is normal and no safety alarm is required.

[0061] In one feasible implementation, the ambient air pressure detector can be set at the geometric center of the top area of ​​the battery compartment. If the ambient air pressure detector cannot be set at the geometric center, it can be set at the position closest to the geometric center to improve the accuracy of ambient air pressure monitoring.

[0062] In this embodiment, by constructing a three-level alarm mechanism of atmosphere, temperature, and air pressure, the comprehensiveness and accuracy of safety risk monitoring in the battery compartment 102 can be improved, and the timeliness of risk detection can be improved, thereby shortening the time when abnormalities occur in the energy storage battery and reducing the damage to the energy storage battery caused by the abnormality.

[0063] In an exemplary embodiment, the passive safety protection device for energy storage batteries applied to an energy storage power station includes multiple inert gas detection groups, each inert gas detection group includes at least one inert gas detector, the distances between the inert gas detectors belonging to the same inert gas detection group and the gas release holes of the inert gas generator 104 are equal, and the distances between the inert gas detectors belonging to different inert gas detection groups and the gas release holes of the inert gas generator 104 are not equal.

[0064] It should be noted that the energy storage power station has a high demand for energy storage power. Therefore, the battery compartment 102 provided in this embodiment for placing energy storage batteries has a large space inside the compartment, which can be several meters in length, width and height. The more completely the inert gas fills the space inside the compartment, the better the risk control effect. However, when energy storage batteries are placed in the battery compartment 102, the flow of inert gas will be hindered. The farther the space area is from the gas release hole of the inert gas generator 104, the more difficult it is to be filled with inert gas, so it is easy to cause safety hazards.

[0065] The gas release hole is the outlet of the inert gas in the inert gas generator 104, and the gas release hole is arranged in the battery compartment 102, so that the inert gas in the inert gas generator 104 can be filled into the battery compartment 102. The number of gas release holes of each inert gas generator 104 can be one or more, that is, the inert gas in each inert gas generator 104 can flow into the battery compartment 102 from one position or multiple positions in the battery compartment 102.

[0066] Therefore, in order to achieve comprehensive monitoring of the atmosphere in the battery compartment 102, multiple groups of inert gas detectors can be set at positions with different distances from the gas release hole, and the inert gas detectors belonging to the same group can be evenly distributed at various positions with the same distance from the gas release hole. For example, the distance between the first group of inert gas detectors 10611 and the gas release hole is D1, the distance between the second group of inert gas detectors 10612 and the gas release hole is D2, ..., the distance between the nth group of inert gas detectors and the gas release hole is Dn, and a circle O1 can be drawn with the gas release hole as the center and D1 as the radius, and the first group of inert gas detectors 10611 can be set on the circumference of O1. Similarly, the position of each group of inert gas detectors can be determined.

[0067] In one possible implementation, referring to Figure 2 Two groups of inert gas detectors are arranged in the battery compartment 102. The first group of inert gas detectors 10611 are arranged at the top of the battery compartment 102 and are closer to the gas release holes of the inert gas generator 104. The second group of inert gas detectors 10612 are arranged at the top of the battery compartment 102 and are farther away from the gas release holes of the inert gas generator 104.

[0068] In this embodiment, by placing inert gas detectors at different distances from the gas release holes, the comprehensiveness of monitoring the atmosphere in the battery compartment 102 can be improved, thereby reducing safety hazards.

[0069] In an exemplary embodiment, the concentration threshold corresponding to the inert gas detector is negatively correlated with the distance between the inert gas detector and the gas release hole.

[0070] It should be noted that the farther the space area is from the gas release hole of the inert gas generator 104, the more difficult it is for the inert gas to flow through, and the more difficult it is to be filled with inert gas. Therefore, under normal circumstances, the inert gas concentration in the space area farther from the gas release hole will be lower than the inert gas concentration in the space area closer to the gas release hole, and it is not caused by an abnormality. If it is based on an inert gas detector that is closer, a higher concentration threshold will be set. For an inert gas detector that is farther away, it is also easy to be lower than this concentration threshold under normal operation, resulting in an erroneous triggering of the alarm; and if it is based on an inert gas detector that is farther away, a lower concentration threshold will be set. For an inert gas detector that is closer, when it is lower than this concentration threshold, the abnormality may have occurred for some time, so the abnormality cannot be discovered in time.

[0071] In one possible implementation, referring to Figure 2 , two groups of inert gas detectors are arranged in the battery compartment 102, the first group of inert gas detectors 10611 are arranged at the top of the battery compartment 102, and are closer to the gas release holes of the inert gas generator 104, and the second group of inert gas detectors 10612 are arranged at the top of the battery compartment 102, and are farther away from the gas release holes of the inert gas generator 104. In this case, the concentration threshold of the first group of inert gas detectors 10611 can be set to 90%, and the concentration threshold of the second group of inert gas detectors 10612 can be set to 80%.

[0072] In this embodiment, by setting the concentration threshold corresponding to each inert gas detector based on the distance between the inert gas detector and the gas release hole, the accuracy of identifying atmosphere anomalies can be improved, and the probability of falsely triggering an alarm can be reduced while ensuring that the atmosphere anomalies can be identified in a timely manner.

[0073] In an exemplary embodiment, referring to Figure 3 The inert gas generator 104 includes a generator body 1041 and an inert gas pipeline 1042. Figure 4 A plurality of gas release holes 10421 are provided on the wall of the inert gas pipeline 1042. The inlet end 10422 of the inert gas pipeline 1042 is connected to the generator body 1041, so as to charge the inert gas in the generator body 1041 into the battery compartment 102 through the gas release holes 10421 and the outlet end 10423 of the inert gas pipeline 1042.

[0074] Among them, at least one of an inert gas storage unit, an inert gas preparation unit and an inert gas acquisition unit can be provided in the generator body 1041, wherein the inert gas storage unit has the function of storing inert gas, and the generator body 1041 can transfer the inert gas stored in the inert gas storage unit to the battery compartment 102; the inert gas preparation unit has the function of preparing inert gas, and the generator body 1041 can transfer the inert gas prepared by the inert gas preparation unit to the battery compartment 102; the inert gas acquisition unit has the function of transmitting inert gas, and the generator body 1041 can obtain inert gas from other inert gas preparation devices through the inert gas acquisition unit, thereby transmitting the obtained inert gas to the battery compartment 102. The inert gas pipeline 1042 is located in the battery compartment 102 and is used to transmit inert gas. The inlet end 10422 of the inert gas pipeline 1042 is connected to the generator body 1041. The inert gas pipeline 1042 can be evenly distributed in the battery compartment 102 and is used to fill the inert gas in the generator body 1041 into the battery compartment 102 through the gas release holes 10421 and the outlet end 10423 of the inert gas pipeline 1042.

[0075] It is understandable that the inert gas pipeline 1042 can be distributed as evenly as possible close to the inner wall of the battery compartment 102. Figure 3 and Figure 4 Only one distribution method is shown. In addition, the inert gas pipeline 1042 can also be distributed along the diagonal of each surface, or other distribution methods can be determined based on actual conditions and test results, etc., and this embodiment does not limit this.

[0076] In this embodiment, the inert gas can be transmitted to various spatial areas within the warehouse through the inert gas pipeline 1042 combined with multiple gas release holes opened on the pipe wall, thereby increasing the concentration of the inert gas in the spatial area that is far away from the generator body 1041 and blocked by the energy storage batteries stored in the warehouse, and improving the uniformity of the inert gas concentration in various spatial areas within the battery warehouse 102.

[0077] In an exemplary embodiment, referring to Figure 5 The passive safety protection device for energy storage batteries used in energy storage power stations also includes a pressure relief valve 108, which is arranged on the body of the battery compartment 102 and is used to discharge the gas in the battery compartment 102 when it is in an open state.

[0078] The pressure relief valve 108 refers to a valve that can transmit the gas in the battery compartment 102 to the outside in a one-way manner, and the number of the pressure relief valves 108 can be one or more. After the battery compartment 102 is connected to the external environment and then re-sealed, the pressure relief valve 108 can be opened first to discharge the gas in the battery compartment 102, and then the pressure relief valve 108 can be closed. After closing the pressure relief valve 108, the inert gas generator 104 is opened to fill the battery compartment 102 with inert gas. When the pressure in the battery compartment 102 is too high and there is a risk of explosion, the pressure relief valve 108 can be opened to reduce the gas pressure in the battery compartment 102.

[0079] In one feasible implementation, the pressure relief valve 108 may be connected to a vacuum pump, so that each time the battery compartment 102 is connected to the external environment and then resealed, the gas in the battery compartment 102 may be extracted by the vacuum pump.

[0080] In one feasible implementation, the pressure relief valve 108 can be connected to the exhaust gas treatment device. In this way, when the energy storage battery in the battery compartment 102 produces exhaust gas due to electrolyte decomposition, chemical reaction, etc., resulting in excessive pressure in the battery compartment 102 and possible risk of explosion, the exhaust gas can be transported to the exhaust gas treatment device through the pressure relief valve 108, which can not only reduce the air pressure in the battery compartment 102 and reduce the risk of explosion, but also avoid environmental pollution caused by exhaust gas emissions.

[0081] In an exemplary embodiment, referring to Figure 6 , a passive safety protection method for energy storage batteries applied to energy storage power stations is provided. This embodiment is illustrated by applying the method to a terminal, wherein the terminal may be, but is not limited to, a personal computer, a laptop computer, a smart phone, a tablet computer, an Internet of Things device, and a portable wearable device. The Internet of Things device may be a smart speaker, a smart TV, a smart air conditioner, a smart vehicle-mounted device, a projection device, etc. The portable wearable device may be a smart watch, a smart bracelet, a head-mounted device, etc. The head-mounted device may be a virtual reality (VR) device, an augmented reality (AR) device, smart glasses, etc. It is understandable that the method may also be applied to a server, and may also be applied to a system including a terminal and a server, and is implemented through the interaction between the terminal and the server. In this embodiment, a passive safety protection device for energy storage batteries applied to an energy storage power station is deployed on the terminal. The passive safety protection device for energy storage batteries applied to the energy storage power station includes a battery compartment, an inert gas generator, and an environmental parameter detector. The inert gas generator is connected to the battery compartment. The method includes steps S10-S20, wherein:

[0082] Step S10, when it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through an inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment.

[0083] It should be noted that the passive safety protection method for energy storage batteries applied to energy storage power stations provided in this embodiment is used to control the passive safety protection device for energy storage batteries applied to energy storage power stations to perform passive safety protection on energy storage batteries.

[0084] S20, when the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued.

[0085] In this embodiment, on the one hand, an inert gas generator is used to fill the battery compartment with inert gas, so that the energy storage battery is in an inert gas environment. Even if the temperature of the energy storage battery reaches the ignition point, since the inert gas cannot burn, the energy storage battery will not catch fire or self-ignite. Therefore, the risk of fire and self-ignition can be prevented from the source, effectively reducing the harm and loss to the energy storage battery itself and other objects and personnel; on the other hand, the environmental conditions in the battery compartment can be monitored through the environmental parameter detector. When the environmental parameter value in the battery compartment is detected to exceed the preset environmental parameter value range, a safety alarm is issued so that the relevant objects can be handled in time to reduce the safety risk of the energy storage battery. In this way, since the risk of fire of the energy storage battery is low, the battery life can be extended, and the full cascade utilization of old batteries is achieved, which is conducive to promoting the recycling of batteries and the development of the energy storage industry.

[0086] In an exemplary embodiment, the environmental parameter value includes at least one of an inert gas concentration value, an ambient temperature value, and an ambient pressure value, the environmental parameter detector includes at least one of an inert gas detector, an ambient temperature detector, and an ambient pressure detector, and the energy storage battery passive safety protection method applied to the energy storage power station also includes:

[0087] Through the inert gas detector, when the inert gas concentration in the battery compartment is detected to be lower than the preset concentration threshold, a safety alarm is issued;

[0088] Through the ambient temperature detector, when the ambient temperature value in the battery compartment is detected to be higher than the preset ambient temperature threshold, a safety alarm is issued;

[0089] Through the ambient pressure detector, when it is detected that the ambient pressure value in the battery compartment is lower than a preset first ambient pressure threshold or higher than a preset second ambient pressure threshold, a safety alarm is issued, wherein the first ambient pressure threshold is lower than the second ambient pressure threshold.

[0090] In an exemplary embodiment, the device includes multiple inert gas detection groups, each inert gas detection group includes at least one inert gas detector, the distances between the inert gas detectors belonging to the same inert gas detection group and the gas release holes of the inert gas generator are equal, and the distances between the inert gas detectors belonging to different inert gas detection groups and the gas release holes of the inert gas generator are not equal.

[0091] In an exemplary embodiment, the concentration threshold corresponding to the inert gas detector is negatively correlated with the distance between the inert gas detector and the gas release hole.

[0092] In an exemplary embodiment, the inert gas generator includes a generator body and an inert gas pipeline, a plurality of gas release holes are opened on the wall of the inert gas pipeline, and an inlet end of the inert gas pipeline is connected to the generator body; the passive safety protection method of the energy storage battery applied to the energy storage power station also includes:

[0093] Through the inert gas generator, the inert gas in the generator body is filled into the battery compartment through the gas release holes and the outlet end of the inert gas pipeline.

[0094] In an exemplary embodiment, the device further includes a pressure relief valve, which is disposed on a body of the battery compartment; the energy storage battery passive safety protection method applied to an energy storage power station further includes:

[0095] Release the gas in the battery compartment by opening the pressure relief valve.

[0096] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0097] Based on the same inventive concept, the embodiment of the present application also provides a computer device for implementing the above-mentioned energy storage battery passive safety protection method applied to the energy storage power station. The computer device can be a terminal, and its internal structure diagram can be as shown in Figure 7As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and the external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a passive safety protection method for energy storage batteries applied to energy storage power stations is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0098] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0099] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above method embodiments when executing the computer program.

[0100] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0101] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0102] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0103] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0104] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0105] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A passive safety protection device for energy storage batteries used in energy storage power stations, characterized in that: The device comprises: A battery compartment, used to place energy storage batteries; an inert gas generator, connected to the battery compartment, and used to fill the battery compartment with inert gas, wherein the inert gas is used to regulate environmental parameters in the battery compartment; An environmental parameter detector, used to issue a safety alarm when the environmental parameter value in the battery compartment is detected to be beyond a preset environmental parameter value range; The environmental parameter detector includes multiple inert gas detection groups, each inert gas detection group includes at least one inert gas detector, the distances between the inert gas detectors belonging to the same inert gas detection group and the gas release holes of the inert gas generator are equal, and the distances between the inert gas detectors belonging to different inert gas detection groups and the gas release holes of the inert gas generator are not equal; the concentration threshold corresponding to the inert gas detector is negatively correlated with the distance between the inert gas detector and the gas release hole; the inert gas detector is used to issue a safety alarm when it detects that the inert gas concentration value in the battery compartment is lower than a preset concentration threshold.

2. The device according to claim 1, characterized in that The environmental parameter value includes at least one of an environmental temperature value and an environmental pressure value, and the environmental parameter detector includes at least one of an environmental temperature detector and an environmental pressure detector, wherein: The ambient temperature detector is used to issue a safety alarm when it detects that the ambient temperature value in the battery compartment is higher than a preset ambient temperature threshold; The ambient air pressure detector is used to issue a safety alarm when it detects that the ambient air pressure value in the battery compartment is lower than a preset first ambient air pressure threshold or higher than a preset second ambient air pressure threshold, wherein the first ambient air pressure threshold is smaller than the second ambient air pressure threshold.

3. The device according to any one of claims 1 to 2, characterized in that The inert gas generator includes a generator body and an inert gas pipeline. A plurality of gas release holes are provided on the tube wall of the inert gas pipeline. The inlet end of the inert gas pipeline is connected to the generator body, so as to fill the inert gas in the generator body into the battery compartment through the gas release holes and the outlet end of the inert gas pipeline.

4. The device according to any one of claims 1 to 2, characterized in that: The device also includes a pressure relief valve, which is arranged on the compartment body of the battery compartment and is used to discharge the gas in the battery compartment when the pressure relief valve is in an open state.

5. A passive safety protection method for energy storage batteries applied to energy storage power stations, characterized in that: A passive safety protection device for energy storage batteries used in energy storage power stations, the passive safety protection device for energy storage batteries used in energy storage power stations comprising a battery compartment, an inert gas generator and an environmental parameter detector, the inert gas generator being in communication with the battery compartment; the environmental parameter detector comprising a plurality of inert gas detection groups, each inert gas detection group comprising at least one inert gas detector, the inert gas detectors belonging to the same inert gas detection group being at an equal distance from the gas release hole of the inert gas generator, and the inert gas detectors belonging to different inert gas detection groups being at an unequal distance from the gas release hole of the inert gas generator; The concentration threshold corresponding to the inert gas detector is negatively correlated with the distance between the inert gas detector and the gas release hole; the method comprises: When it is determined that an energy storage battery is placed in the battery compartment, an inert gas is filled into the battery compartment through the inert gas generator, wherein the inert gas is used to regulate environmental parameters in the battery compartment; When the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, a safety alarm is issued; The step of issuing a safety alarm when the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range includes: The inert gas detector can generate a safety alarm when it is detected that the inert gas concentration in the battery compartment is lower than a preset concentration threshold.

6. The method according to claim 5, characterized in that The environmental parameter value includes at least one of an environmental temperature value and an environmental pressure value, and the environmental parameter detector includes at least one of an environmental temperature detector and an environmental pressure detector; when the environmental parameter detector detects that the environmental parameter value in the battery compartment exceeds a preset environmental parameter value range, issuing a safety alarm includes at least one of the following: When the ambient temperature detector detects that the ambient temperature in the battery compartment is higher than a preset ambient temperature threshold, a safety alarm is issued; The ambient pressure detector can generate a safety alarm when it is detected that the ambient pressure value in the battery compartment is lower than a preset first ambient pressure threshold or higher than a preset second ambient pressure threshold, wherein the first ambient pressure threshold is lower than the second ambient pressure threshold.

7. The method according to claim 5, characterized in that The inert gas generator comprises a generator body and an inert gas pipeline, a plurality of gas release holes are provided on the wall of the inert gas pipeline, and an inlet end of the inert gas pipeline is connected to the generator body; the inert gas is filled into the battery compartment through the inert gas generator, comprising: The inert gas in the generator body is filled into the battery compartment through the gas release holes and the outlet end of the inert gas pipeline by the inert gas generator.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 5 to 7 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 5 to 7 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 5 to 7 are implemented.

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