Energy storage battery safety protection system, method, device, storage medium and program product

Abstract

The present application relates to a safety protection system, method, device, storage medium and program product for energy storage batteries. The system includes an inert gas generator, multiple battery compartments and an environmental parameter detector, wherein the inert gas generator is connected to each of the battery compartments through a gas pipeline; wherein the battery compartment is used to place energy storage batteries; the inert gas generator is used to fill inert gas into at least one first target battery compartment, wherein the first target battery compartment refers to a battery compartment in which energy storage batteries are placed; the environmental parameter detector is used to issue a first safety alarm when an environmental parameter value in at least one of the first target battery compartments is detected to exceed a preset environmental parameter value range. The use of this system can reduce the safety risks of energy storage batteries.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to an energy storage battery safety protection system, method, device, storage medium and program product. 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 storage battery safety protection system, method, device, storage medium and program product that 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 an energy storage battery safety protection system, the system comprising:

[0007] In one embodiment, the energy storage battery safety protection system includes an inert gas generator, a plurality of battery compartments and an environmental parameter detector, and the inert gas generator is connected to each battery compartment through a gas pipeline; wherein:

[0008] A battery compartment, used to place energy storage batteries;

[0009] An inert gas generator, used to fill inert gas into at least one first target battery compartment, wherein the first target battery compartment refers to a battery compartment in which an energy storage battery is placed;

[0010] The environmental parameter detector is used to issue a first safety alarm when it detects that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range.

[0011] In a second aspect, the present application also provides a method for protecting the safety of an energy storage battery, which is applied to a safety protection system for an energy storage battery. The safety protection system for an energy storage battery includes an inert gas generator, multiple battery compartments, and an environmental parameter detector. The inert gas generator is respectively connected to each battery compartment through a gas pipeline. The method includes: when it is determined that there is at least one first target battery compartment in each battery compartment where an energy storage battery is placed, filling each first target battery compartment with an inert gas through the inert gas generator, wherein the inert gas is used to regulate the environmental parameter value in each first target battery compartment; when the environmental parameter detector monitors that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range, issuing a first safety alarm.

[0012] On the third aspect, the present application also provides a computer device, which is applied to an energy storage battery safety protection system. The energy storage battery safety protection system includes an inert gas generator, multiple battery compartments and an environmental parameter detector. The inert gas generator is connected to each battery compartment through a gas pipeline. The computer device includes a memory and a processor. The memory stores a computer program. When the processor executes the computer program, the following steps are implemented: when it is determined that there is at least one first target battery compartment in each battery compartment where an energy storage battery is placed, inert gas is filled into each first target battery compartment through the inert gas generator, wherein the inert gas is used to regulate the environmental parameter value in each first target battery compartment; when the environmental parameter detector monitors that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range, a first safety alarm is issued.

[0013] In a fourth aspect, the present application also provides a computer-readable storage medium having a computer program stored thereon, which is applied to an energy storage battery safety protection system, wherein the energy storage battery safety protection system comprises an inert gas generator, a plurality of battery compartments and an environmental parameter detector, wherein the inert gas generator is respectively connected to each battery compartment through a gas pipeline, and the computer program implements the following steps when executed by the processor: when it is determined that there is at least one first target battery compartment in which an energy storage battery is placed in each battery compartment, an inert gas is filled into each first target battery compartment through the inert gas generator, wherein the inert gas is used to regulate the environmental parameter value in each first target battery compartment; when the environmental parameter detector monitors that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range, a first safety alarm is issued.

[0014] In a fifth aspect, the present application also provides a computer program product, including a computer program, which is applied to an energy storage battery safety protection system. The energy storage battery safety protection system includes an inert gas generator, multiple battery compartments and an environmental parameter detector. The inert gas generator is connected to each battery compartment through a gas pipeline. When the computer program is executed by a processor, the following steps are implemented: when it is determined that there is at least one first target battery compartment in each battery compartment where an energy storage battery is placed, an inert gas is filled into each first target battery compartment through the inert gas generator, wherein the inert gas is used to regulate the environmental parameter value in each first target battery compartment; when the environmental parameter detector monitors that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range, a first safety alarm is issued.

[0015] The above-mentioned energy storage battery safety protection system, method, device, storage medium and program product, on the one hand, through the inert gas generator, fills inert gas into each first target battery compartment, so that the energy storage battery in each first target battery compartment 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, spontaneous combustion and the like can be prevented from the source, and the harm and loss to the energy storage battery itself and other objects and personnel can be effectively reduced. Moreover, through the inert gas generator, the unified management and delivery of the inert gas demand of multiple first target battery compartments can be realized, so as to improve resource utilization and reduce the energy storage cost of the energy storage power station; on the other hand, through the environmental parameter detector, the environmental conditions in each battery compartment can be monitored. When the environmental parameter value in at least one first target battery compartment is monitored to exceed the preset environmental parameter value range, a first safety alarm is issued, so that the relevant objects can be processed in time to reduce the safety risk of the energy storage battery. In this way, since the fire risk of energy storage batteries is lower, the battery life can be extended, and the old batteries can be fully utilized in stages, which is conducive to promoting battery recycling and the development of the energy storage industry, comprehensively improving resource utilization and reducing the energy storage cost of energy storage power stations. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] 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.

[0017] Figure 1 A schematic diagram of component modules of an energy storage battery safety protection system in one embodiment;

[0018] Figure 2 A schematic diagram of component modules of an energy storage battery safety protection system provided with multiple inert gas detection groups in one embodiment;

[0019] Figure 3 A schematic diagram of component modules of an energy storage battery safety protection system provided with a delivery pipeline in one embodiment;

[0020] Figure 4 This is a schematic diagram of the structure of a delivery pipeline in one embodiment;

[0021] Figure 5 A schematic diagram of component modules of an energy storage battery safety protection system provided with a battery health monitoring subsystem in one embodiment;

[0022] Figure 6 A schematic diagram of a process flow of a method for protecting a storage battery in accordance with an embodiment of the present invention;

[0023] Figure 7 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0024] 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.

[0025] 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.

[0026] 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.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] In an exemplary embodiment, Figure 1 As shown, a safety protection system for energy storage batteries is provided, which includes an inert gas generator 104, a plurality of battery compartments 102 and an environmental parameter detector 106. The inert gas generator 104 is connected to each battery compartment 102 through a gas pipeline.

[0031] It should be noted that a large number of lithium-ion batteries have entered the service life or even the retirement period. The cascade utilization of power batteries has become a key task that the lithium battery industry must solve. 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 to achieve the cascade utilization of batteries. However, the current application of cascade utilization batteries in the field of energy storage 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.

[0032] 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.

[0033] 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.

[0034] 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 each battery compartment 102 through a gas pipeline, so that the inert gas can be filled into each battery compartment 102. 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 102 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.

[0035] In a feasible implementation, a parameter control device, such as a flow control valve, a heating device, a cooling device, a pressurizing device, a decompressing device, etc., may be provided on the gas pipeline between the inert gas generator 104 and each battery compartment 102. The parameter control device corresponds to each battery compartment 102 one by one. The parameter control device is used to control the inflation parameters of the inert gas filled into the corresponding battery compartment 102. The inflation parameters include at least one of inflation time, inflation volume, gas temperature, gas pressure, and gas flow rate. In this way, each battery compartment 102 can be independently regulated.

[0036] The environmental parameter detector 106 refers to a device for monitoring environmental parameters. The environmental parameter detector 106 can monitor whether the environmental parameter value of the environment in each battery compartment 102 is within a preset environmental parameter value range, and can also issue a first safety alarm when it is detected that the environmental parameter value in at least one first target battery compartment 102 is not within the preset environmental parameter value range. The number of environmental parameter detectors 106 can be one or more. In a feasible implementation manner, 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 respectively arranged in each battery compartment 102, and is used to collect the environmental parameter values ​​of the environment in each 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 in at least one first target battery compartment 102 is not within the preset environmental parameter value range, a first safety alarm is issued. For example, the detector body may be a management terminal or a user terminal of a management personnel arranged outside the compartment body of the battery compartment 102; in a feasible implementation manner, 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. The alarm issues a first safety alarm in response to the alarm instruction to attract the attention of relevant personnel and deal with possible risks in a timely manner.

[0037] As an example, the energy storage batteries that need to be protected can be placed in each 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 an energy storage battery is placed in at least one first target battery compartment 102, or the inert gas generator 104 and the environmental parameter detector 106 can be activated when needed by a user, a robot or a terminal device; when the inert gas generator 104 is activated, the first target battery compartment 102 can be filled with inert gas to create an inert atmosphere environment for the energy storage battery placed in the first target battery compartment 102, so that when the external environment temperature is too high or the energy storage battery is overloaded, the inert gas generator 104 and the environmental parameter detector 106 can be activated. In the case of rising temperature, the low-temperature inert gas can effectively suppress the increase in the 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 a fixed time whether the environmental parameter value of the environment in the first target battery compartment 102 is within the preset environmental parameter value range. If it is monitored that the environmental parameter value in at least one first target battery compartment 102 exceeds the preset environmental parameter value range, a first safety alarm is issued to remind relevant personnel to deal with possible risks in a timely manner.

[0038] 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 first target battery compartment 102 where the energy storage battery is placed can be regulated by the inert gas generator 104. When it is monitored that the environmental parameter value in any first target battery compartment 102 meets the preset working conditions, the transmission channel between the inert gas generator 104 and the first target battery compartment 102 can be closed, and the inert gas generator 104 is suspended from supplying inert gas to the first target battery compartment 102, and the first target battery compartment 102 is placed in a closed state; then, the energy storage system can be enabled, the energy storage battery starts working, and the environmental parameter detector 106 can be turned on synchronously to monitor the environmental parameters in the first target battery compartment 102. When the energy storage batteries are operating normally, the energy storage batteries in each first target battery compartment 102 can operate normally under the protection of an inert atmosphere. If an abnormal condition occurs in any energy storage battery in the first target battery compartment 102, such as a short circuit, high temperature, etc., it may cause changes in the ambient temperature and ambient air pressure in the first target battery compartment 102, and other gases may also be generated, changing the concentration of the inert gas in the first target battery compartment 102. Therefore, when the environmental parameter value in any first target battery compartment 102 is monitored by the environmental parameter detector 106 and exceeds the preset environmental parameter value range, a first safety alarm is issued.

[0039] It is understandable that the inert gas generator 104 and the environmental parameter detector 106 can be turned on simultaneously or one after another.

[0040] In the above energy storage battery safety protection system, on the one hand, through the inert gas generator 104, inert gas is filled into each first target battery compartment 102, so that the energy storage battery in each first target battery compartment 102 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, spontaneous combustion, etc. can be prevented from the source, and the harm and loss to the energy storage battery itself and other objects and personnel can be effectively reduced. In addition, through the inert gas generator 104, the unified management and delivery of the inert gas demand of multiple first target battery compartments 102 can be achieved, the resource utilization rate is improved, and the energy storage cost of the energy storage power station is reduced; on the other hand, through the environmental parameter detector 106, the environmental conditions in each battery compartment 102 can be monitored. When the environmental parameter value in at least one first target battery compartment 102 is monitored to exceed the preset environmental parameter value range, a first safety alarm is issued, so that the relevant objects can be processed in time to reduce the safety risk of the energy storage battery. In this way, since the fire risk of energy storage batteries is lower, the battery life can be extended, and the old batteries can be fully utilized in stages, which is conducive to promoting battery recycling and the development of the energy storage industry, comprehensively improving resource utilization and reducing the energy storage cost of energy storage power stations.

[0041] 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:

[0042] An inert gas detector refers to a device that can detect the inert gas concentration value in the environment. The environmental parameter value includes the inert gas concentration value, and the environmental parameter value range includes a concentration value greater than or equal to a preset threshold value. As an example, the inert gas detector can collect a certain amount of ambient gas from each first target battery compartment 102, and then detect the amount of inert gas in the ambient gas, and determine the concentration of the inert gas in each first target battery compartment 102 based on the ratio of the amount of inert gas to the amount of ambient gas. If the inert gas concentration value of any first target battery compartment 102 is detected to be lower than the preset concentration threshold, it means that the first target battery compartment 102 may have an abnormal atmosphere, such as the energy storage battery producing other gases due to electrolyte decomposition, chemical reactions, etc., the airtightness of the battery compartment 102 is reduced, etc., the energy storage battery electrolyte decomposition, chemical reactions, etc. Failure of surface energy storage batteries such as biochemical reactions will have an adverse effect on the normal operation of the energy storage system and the service life of the energy storage batteries. Reduced air tightness will cause inert gas to leak out of the battery compartment 102 and 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 first safety alarm to remind relevant personnel to deal with abnormal atmosphere conditions in a timely manner; if the inert gas concentration values ​​in all first target battery compartments 102 are detected to be greater than or equal to the preset concentration threshold, it means that the atmosphere in each first target battery compartment 102 is normal and no safety alarm is required. In a feasible implementation, the battery compartment 102 can be a rectangular structure, and an inert gas detector can be set at each top corner and bottom corner of the battery compartment 102. This is to improve the comprehensiveness of inert gas monitoring in the battery compartment 102.

[0043] The ambient temperature detector refers to a device capable of detecting the ambient temperature. The ambient parameter value includes the ambient temperature value. The ambient parameter value range includes less than or equal to a preset ambient temperature threshold value. The ambient temperature threshold value can be determined according to actual conditions and test results, such as 15°C, 20°C, 25°C, etc. It can also be adjusted according to the external ambient temperature, such as 15°C in winter, 20°C in spring and autumn, and 25°C in summer. This embodiment does not limit this. In one 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 each first target battery compartment 102, and compare the numerical value relationship between the ambient temperature value and the ambient temperature threshold. If it is detected that the ambient temperature value in any first target battery compartment 102 is higher than the preset ambient temperature threshold, it means that an abnormal temperature may have occurred in the first target battery compartment 102, such as a decrease in the thermal insulation performance of the battery compartment 102, an abnormal increase in the temperature of the energy storage battery, etc., and therefore a first safety alarm needs to be issued to remind relevant personnel to deal with the abnormal temperature in a timely manner; if it is detected that the ambient temperature values ​​in all first target battery compartments 102 are less than or equal to the preset ambient temperature threshold, it means that the ambient temperature in each first target battery compartment 102 is normal, and no safety alarm is required. In a feasible implementation, the ambient temperature detector can be set at the geometric center of the space area in the battery compartment 102. When 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.

[0044] 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 each first target battery compartment 102. If the ambient air pressure value in any first target battery compartment 102 is detected to be lower than the preset first ambient air pressure threshold, it means that a low pressure abnormality may have occurred in the first target battery compartment 102, for example, the air tightness of the battery compartment 102 is reduced, etc. 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 fire risk of the battery compartment 102. Therefore, it is necessary to issue a first safety alarm to remind relevant personnel to deal with the low pressure abnormality in time; if If the ambient air pressure value in any first target battery compartment 102 is detected to be higher than the preset second ambient air pressure threshold, it means that a high-voltage abnormality may occur in the first target battery compartment 102. If the air pressure in the battery compartment 102 is too high in a sealed state, it may cause an explosion. Therefore, a first safety alarm needs to be issued to remind relevant personnel to deal with the high-voltage abnormality in a timely manner; if the ambient air pressure values ​​in all first target battery compartments 102 are detected to be 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. In a feasible implementation, the ambient air pressure detector can be set at the geometric center of the top area of ​​the battery compartment 102. 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.

[0045] 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.

[0046] In an exemplary embodiment, the energy storage battery safety protection system 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; 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.

[0047] 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.

[0048] 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.

[0049] 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 and the gas release hole is D1, the distance between the second group of inert gas detectors 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 can be set on the circumference of O1. Similarly, the position of each group of inert gas detectors can be determined.

[0050] 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.

[0051] 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%.

[0052] In this embodiment, by placing inert gas detectors at different distances from the gas release hole, the comprehensiveness of monitoring the atmosphere in the battery compartment 102 can be improved, thereby reducing safety hazards. 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 abnormal atmosphere can be improved, and the probability of false alarm triggering can be reduced while ensuring that the abnormal atmosphere can be identified in time.

[0053] In one possible implementation, referring to Figure 3The delivery pipeline 110 includes a first pipe section 1101 and a second pipe section 1102, wherein the first pipe section 1101 refers to the delivery pipeline 110 section located outside the battery compartment 102, and the second pipe section 1102 refers to the delivery pipeline 110 section located inside the battery compartment 102. A plurality of gas release holes 11021 can be opened on the pipe wall of the second pipe section 1102. The inlet end 11022 of the delivery pipeline 110 is connected to the inert gas generator 104 through the first pipe section 1101, so as to fill the inert gas in the inert gas generator 104 into the battery compartment 102 through the gas release holes 11021 and the outlet end 11023 of the delivery pipeline 110. The delivery pipeline 110 may be evenly distributed in the battery compartment 102 , and is used to fill the inert gas in the inert gas generator 104 into various space areas in the battery compartment 102 through the gas release holes 11021 and the outlet end 11023 of the delivery pipeline 110 .

[0054] It is understandable that the second pipe section 1102 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 second pipe segment 1102 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.

[0055] In this embodiment, by evenly deploying the second pipe segment 1102 and combining with a plurality of gas release holes opened on the wall of the second pipe segment 1102, the inert gas can be transmitted to various spatial regions within the warehouse body, thereby increasing the concentration of the inert gas in the spatial region that is far away from the inert gas generator 104 and blocked by the energy storage battery, and improving the uniformity of the inert gas concentration in various spatial regions within the battery warehouse 102.

[0056] In one feasible implementation, the energy storage battery safety protection system further includes a pressure relief valve, which is disposed 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. The pressure relief valve refers to a valve that can transmit the gas in the battery compartment 102 to the outside in a unidirectional manner, and the number of the pressure relief valves can be one or more. After the battery compartment 102 is connected to the external environment and then resealed, the pressure relief valve can be opened first to discharge the gas in the battery compartment 102, and then the pressure relief valve can be closed. After closing the pressure relief valve, the inert gas generator 104 can be 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 can be opened to reduce the air pressure in the battery compartment 102.

[0057] In one feasible implementation, the pressure relief valve 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.

[0058] In one feasible implementation, the pressure relief valve 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, 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.

[0059] In an exemplary embodiment, referring to Figure 5 ,The energy storage battery safety protection system also includes a battery health monitoring subsystem, and the battery health monitoring subsystem includes a battery operation data collector and a battery health monitoring module.

[0060] It should be noted that compared with new batteries, the structure of second-hand batteries is less stable, and the danger of energy storage batteries is greatly increased compared with new batteries, and the service life is greatly shortened compared with new batteries. Since the passive protection means in traditional technology can only cool down and extinguish the fire after the energy storage battery catches fire or burns, the damage that has occurred to the energy storage battery before the fire is extinguished cannot be restored. Therefore, it is necessary to use big data and algorithm models to form a strict monitoring network. Before the battery catches fire or spontaneously combusts, a large amount of battery data, environmental data, etc. are used to predict the state of the energy storage battery in the future, so as to prevent the energy storage battery from catching fire and burning. However, the prediction accuracy of the active safety protection method using the monitoring network is limited. To achieve a higher prediction accuracy, a large amount of data and calculation is required, which consumes more resources and has a higher cost.

[0061] Among them, the battery health monitoring subsystem refers to a system for monitoring the availability and safety of energy storage batteries. By monitoring the availability and safety of energy storage batteries, active safety protection of energy storage systems can be achieved. In a feasible implementation, the timing of monitoring the availability and safety of energy storage batteries can be determined in advance. For example, the monitoring can be performed regularly during the normal operation of the energy storage battery, or the monitoring can be performed regularly when the energy storage battery is in an idle state, or the monitoring can be performed after the abnormal situation of the energy storage battery is eliminated and put into use again. Among them, when the energy storage battery is in an idle state, the energy storage battery is not working, so its battery operation data cannot be collected. In this case, the energy storage battery safety protection system can also include a charging and discharging device, which is electrically connected to the energy storage battery, and can regulate the charging and discharging process of the energy storage battery and simulate the working state of the energy storage battery. For example, when it is detected that the energy storage battery is in an idle state for more than a preset number of days, the charging and discharging device can be used to start the charging and discharging test of the energy storage battery under normal working conditions, and the battery operation data of the energy storage battery in the simulated working state can be collected by the data acquisition device.

[0062] Battery operation data refers to data used to characterize the operation status of the energy storage battery during operation, including current value, voltage value, temperature value, state of charge, etc. The battery operation data collector can be electrically connected to one or more energy storage batteries in each battery compartment 102, and can then collect the battery operation data of each energy storage battery electrically connected thereto. It can be understood that the number of battery operation data collectors can be one or more, and each battery operation data collector can collect the battery operation data of one or more energy storage batteries. In order to ensure comprehensive health monitoring of all energy storage batteries, each energy storage battery can be electrically connected to at least one battery operation data collector.

[0063] Battery performance data is used to characterize the availability and safety of energy storage batteries, including battery pack internal resistance, battery cell internal resistance, battery cell internal resistance consistency value, temperature consistency data, voltage consistency value, charging capacity value, etc. Battery performance data can be calculated based on battery operation data. For example, the ratio of the battery cell voltage value to the battery cell current value is the internal resistance value of the battery cell.

[0064] The battery health monitoring module is used to monitor whether the availability and safety of each energy storage battery meet the preset battery health conditions, and issue a second safety alarm when it is detected that the availability and safety of any one or more energy storage batteries do not meet the preset battery health conditions. The battery health conditions can be determined according to actual conditions or test results, etc., and this embodiment does not limit this.

[0065] It is understandable that the second safety alarm and the first safety alarm may be the same or different. For example, the first safety alarm and the second safety alarm may both emit the same alarm information such as alarm sound and alarm light through an alarm device set outside the battery compartment; or, the first safety alarm and the second safety alarm may both send safety warning information to the management terminal, but the safety warning information may be different. The safety warning information corresponding to the first safety alarm may include relevant information about abnormal environmental parameters corresponding to the abnormal situation, and the safety warning information corresponding to the second safety alarm may include relevant information about energy storage batteries or cells that do not meet preset battery health conditions; or, the intensity of the first safety alarm is higher than that of the second safety alarm, and the first safety alarm has more alarm paths than the second. The second alarm channel of the safety alarm, the first safety alarm can adopt multiple alarm channels such as on-site alarm and remote alarm. The on-site alarm is to emit alarm information such as alarm sound and alarm light through the alarm set outside the battery compartment. The remote alarm is to send safety warning information to the management terminal. When the first safety alarm is needed, there is a high probability that the energy storage battery is abnormal. In this case, a higher intensity and more comprehensive alarm can effectively reduce damage to the energy storage battery. When the second safety alarm is needed but the first safety alarm is not triggered, the energy storage battery may be idle, or the safety risk is low and the urgency is low. Therefore, a lower intensity alarm channel can be adopted, which can not only make it easier for managers to distinguish different alarm scenarios, but also save resources.

[0066] As an example, the battery operation data of the energy storage battery can be continuously or periodically collected by a data collection device; then, active safety protection can be performed periodically or in a triggered manner, and the battery health monitoring module obtains the target battery operation data required for detecting the battery performance data from the collected battery operation data, detects the battery performance data based on the target battery operation data, and then compares the battery performance data with the preset battery health conditions to determine whether the battery performance data meets the preset battery health conditions. If the battery performance data does not meet the preset battery health conditions, it means that there are abnormalities in the availability and safety of the energy storage battery, and a second safety alarm is issued to remind relevant personnel to promptly replace the energy storage battery or battery cell that does not meet the preset battery health conditions, so as to avoid the situation where the overall life of the energy storage system is shortened due to local battery failure, thereby achieving the purpose of extending the overall service life of the battery; if the battery performance data meets the preset battery health conditions, it means that there is no abnormality in the availability and safety of the energy storage battery, and there is no need to issue the second safety alarm temporarily.

[0067] In one feasible implementation, a method for detecting the internal resistance of a battery pack includes: obtaining a first unit voltage change value and a first unit current change value of the energy storage battery under at least one first target state of charge, detecting a time-sharing internal resistance value corresponding to each first target state of charge based on the first unit voltage change value and the first unit current change value, and determining an average value of each time-sharing internal resistance value as the internal resistance value of the battery pack of the energy storage battery.

[0068] Among them, the unit voltage change value refers to the change value of the voltage at each unit state of charge during the charging and discharging process, and the first unit voltage change value refers to the unit voltage change value of the battery pack; the unit current change value refers to the change value of the current at each unit state of charge during the charging and discharging process, and the first unit current change value refers to the unit current change value of the battery pack; the ratio of the unit voltage change value to the unit current change value at the same state of charge is the time-sharing internal resistance value at that state of charge. In order to improve the evaluation accuracy, multiple time-sharing internal resistance values ​​of the battery pack at different states of charge can be detected, and the detection error can be reduced by averaging to improve the detection accuracy.

[0069] Exemplarily, the battery pack voltage data and the battery pack current data of the energy storage battery collected by the data collection device during the charging and discharging process can be first obtained, and the first unit voltage change value of the energy storage battery under at least one first target state of charge is extracted from the battery pack voltage data, and the first unit current change value of the energy storage battery under at least one first target state of charge is extracted from the battery pack current data; then, the ratio of the first unit voltage change value to the first unit current change value corresponding to each first target state of charge is calculated to obtain the time-sharing internal resistance value of the battery pack under each first target state of charge; then, the average value of each time-sharing internal resistance value is calculated to obtain the battery pack internal resistance value of the energy storage battery.

[0070] In one feasible implementation, a method for detecting a current battery cell internal resistance consistency value includes: obtaining a second unit voltage change value and a second unit current change value of each battery cell at a second target state of charge, detecting the battery cell internal resistance value of each battery cell at the second target state of charge based on the second unit voltage change value and the second unit current change value, and determining the difference between the maximum battery cell internal resistance value and the minimum battery cell internal resistance value among the battery cell internal resistance values ​​as the battery cell internal resistance consistency value of the energy storage battery.

[0071] Among them, the second unit voltage change value refers to the unit voltage change value of the battery cell; the second unit current change value refers to the unit current change value of the battery cell.

[0072] Exemplarily, the cell voltage data and cell current data of each cell in the same energy storage battery collected by the data acquisition device during the charging and discharging process can be first obtained, and the second unit voltage change value of each cell at the second target state of charge is extracted from the cell voltage data, and the second unit current change value of each cell at the second target state of charge is extracted from the cell current data; then, the ratio of the second unit voltage change value to the second unit current change value corresponding to each cell is calculated to obtain the cell internal resistance value of each cell at each second target state of charge; then, the maximum cell internal resistance value and the minimum cell internal resistance value are selected from each cell internal resistance value, and the difference between the maximum cell internal resistance value and the minimum cell internal resistance value is determined as the cell internal resistance consistency value of the energy storage battery. It can be understood that if multiple energy storage batteries are placed in the battery compartment 102, the cell internal resistance consistency value of each energy storage battery can be detected separately.

[0073] In one feasible implementation, the detection method of the current temperature consistency value includes: obtaining the battery cell temperature value collected by each battery cell at the same time, and determining the difference between the maximum battery cell temperature value and the minimum battery cell temperature value among the battery cell temperature values ​​as the temperature consistency value of the energy storage battery.

[0074] For example, the temperature data of each battery cell in the same energy storage battery collected by the data acquisition device during the charging and discharging process can be first obtained, and the battery cell temperature value of each battery cell at the same time can be extracted from the temperature data; then, the maximum battery cell temperature value and the minimum battery cell temperature value are selected from each battery cell temperature value, and the difference between the maximum battery cell temperature value and the minimum battery cell temperature value is determined as the temperature consistency value of the energy storage battery. It can be understood that if multiple energy storage batteries are placed in the battery compartment 102, the temperature consistency value of each energy storage battery can be detected separately.

[0075] In one feasible implementation, the detection method of the current voltage consistency value includes: obtaining the cell voltage values ​​collected by each cell at the same time, and determining the difference between the maximum cell voltage value and the minimum cell voltage value among the cell voltage values ​​as the voltage consistency value of the energy storage battery.

[0076] For example, the voltage data of each cell in the same energy storage battery collected by the data acquisition device during the charging and discharging process can be first obtained, and the cell voltage value of each cell at the same time can be extracted from the voltage data; then, the maximum cell voltage value and the minimum cell voltage value are selected from each cell voltage value, and the difference between the maximum cell voltage value and the minimum cell voltage value is determined as the voltage consistency value of the energy storage battery. It can be understood that if multiple energy storage batteries are placed in the battery compartment 102, the voltage consistency value of each energy storage battery can be detected separately.

[0077] In a feasible implementation manner, the current charging capacity value detection method includes: acquiring charging current data of the energy storage battery in a target charging segment, and integrating the charging current data to obtain the charging capacity value of the energy storage battery.

[0078] Among them, the charging current data refers to the curve of the current changing with time during the charging process.

[0079] Exemplarily, the charging current data of the energy storage battery in the target charging segment collected by the data collection device may be first obtained, and the charging current data may be integrated by the ampere-hour integration method to obtain the charging capacity value of the energy storage battery.

[0080] In this embodiment, since the battery compartment 102 is filled with inert gas, the damage to the energy storage battery caused by fire, combustion, etc. can be effectively reduced. Therefore, in the active safety protection process, the availability and safety evaluation method can be used to judge the current state of the energy storage battery. Compared with the prediction method, it can effectively reduce the amount of data required for active safety protection, reduce computing resources and costs, and improve the accuracy of judgment.

[0081] In an exemplary embodiment, the battery performance data includes the current battery pack internal resistance value, the current battery cell internal resistance consistency value, the current temperature consistency value, the current voltage consistency value and the current charging capacity value; the battery health monitoring module includes a battery internal resistance monitoring unit, a battery cell internal resistance consistency monitoring unit, a temperature consistency monitoring unit, a voltage consistency monitoring unit and a charging capacity monitoring unit.

[0082] Among them, the battery internal resistance monitoring unit is used to monitor whether the battery pack internal resistance of the energy storage battery meets the preset battery health conditions; the battery cell internal resistance consistency monitoring unit is used to monitor whether the battery cell internal resistance consistency of the energy storage battery meets the preset battery health conditions; the temperature consistency monitoring unit is used to monitor whether the temperature consistency of the energy storage battery meets the preset battery health conditions; the voltage consistency monitoring unit is used to monitor whether the voltage consistency of the energy storage battery meets the preset battery health conditions; the charging capacity monitoring unit is used to monitor whether the charging capacity of the energy storage battery meets the preset battery health conditions. The battery pack internal resistance change rate is used to characterize the change in the ohmic internal resistance value of the battery pack compared with the initial state of the battery pack; the battery cell internal resistance consistency change rate is used to characterize the change in the ohmic internal resistance consistency of each battery cell in the battery pack compared with the initial state of the battery cell, wherein the ohmic internal resistance consistency is used to characterize the difference between the ohmic internal resistance values ​​of each battery cell in the same battery pack; the temperature consistency change rate is used to characterize the change in the temperature consistency of each battery cell in the battery pack compared with the initial state of the battery cell, wherein the temperature consistency is used to characterize the difference between the temperature values ​​of each battery cell in the same battery pack; the voltage consistency change rate is used to characterize the change in the voltage consistency of each battery cell in the battery pack compared with the initial state of the battery cell, wherein the voltage consistency is used to characterize the difference between the voltage values ​​of each battery cell in the same battery pack; the charging capacity change rate is used to characterize the change in the charging capacity of the energy storage battery compared with the initial state of the battery pack. Therefore, each time the availability and safety of the energy storage battery is evaluated, the currently detected battery performance data can be obtained, the currently detected battery performance data can be compared with the initial battery performance data, and the changes in each battery performance data can be calculated, so as to determine whether the energy storage battery currently meets the preset battery health conditions.

[0083] As an example, the battery internal resistance monitoring unit can calculate the battery pack internal resistance difference between the current battery pack internal resistance value and the preset initial battery pack internal resistance value, determine the battery pack internal resistance difference as the battery pack internal resistance change rate of the energy storage battery, compare the battery pack internal resistance change rate with the preset first change rate threshold, determine whether the battery pack internal resistance change rate is greater than the first change rate threshold, and if it is detected that the battery pack internal resistance change rate is greater than the preset first change rate threshold, a second safety alarm is issued; the battery cell internal resistance consistency monitoring unit can calculate the battery cell internal resistance consistency difference between the current battery cell internal resistance consistency value and the preset initial battery cell internal resistance consistency value, determine the battery cell internal resistance consistency difference as the battery cell internal resistance consistency change rate of the energy storage battery, compare the battery cell internal resistance consistency change rate with the preset second change rate threshold, determine whether the battery cell internal resistance consistency change rate is greater than the second change rate threshold, and if it is detected that the battery cell internal resistance consistency change rate is greater than the preset second change rate threshold, a second safety alarm is issued; the temperature consistency monitoring unit can calculate the temperature consistency difference between the current temperature consistency value and the preset initial temperature consistency value, determine the temperature consistency difference as the energy storage battery. The temperature consistency change rate of the battery, compare the temperature consistency change rate with the preset third change rate threshold, determine whether the temperature consistency change rate is greater than the third change rate threshold, and if it is detected that the temperature consistency change rate is greater than the preset third change rate threshold, a second safety alarm is issued; the voltage consistency monitoring unit can calculate the voltage consistency difference between the current voltage consistency value and the preset initial voltage consistency value, determine the voltage consistency difference as the voltage consistency change rate of the energy storage battery, compare the voltage consistency change rate with the preset fourth change rate threshold, determine whether the voltage consistency change rate is greater than the fourth change rate threshold, and if it is detected that the voltage consistency change rate is greater than the preset first change rate threshold, a second safety alarm is issued; the charging capacity monitoring unit can calculate the charging capacity difference between the current charging capacity value and the preset initial charging capacity value, determine the charging capacity difference as the charging capacity change rate of the energy storage battery, compare the charging capacity change rate with the preset fifth change rate threshold, determine whether the charging capacity change rate is greater than the fifth change rate threshold, and if it is detected that the charging capacity change rate is greater than the preset fifth change rate threshold, a second safety alarm is issued.

[0084] Among them, the first change rate threshold, the second change rate threshold, the third change rate threshold, the fourth change rate threshold and the fifth change rate threshold may be the same or different. The battery internal resistance monitoring unit, the battery cell internal resistance consistency monitoring unit, the temperature consistency monitoring unit, the voltage consistency monitoring unit and the charging capacity monitoring unit may perform the above monitoring process synchronously or in any order, and this embodiment does not limit this. When the battery internal resistance monitoring unit, the battery cell internal resistance consistency monitoring unit, the temperature consistency monitoring unit, the voltage consistency monitoring unit and the charging capacity monitoring unit all monitor that the battery performance data meets the preset battery health conditions, it means that there is no abnormality in the energy storage battery and there is no need to issue a second safety alarm.

[0085] In this embodiment, the availability and safety of the energy storage battery can be evaluated more accurately from five aspects: the ohmic internal resistance of the battery pack, the internal resistance consistency of the battery cells, the temperature consistency of the battery cells, the voltage consistency of the battery cells and the charging capacity of the battery pack. The energy storage battery or battery cell can be replaced in time to avoid the situation where the overall life of the energy storage system is shortened due to local battery failure, thereby achieving the purpose of extending the battery service life.

[0086] In an exemplary embodiment, referring to Figure 1 The energy storage battery safety protection system also includes a flow controller 108 arranged on each gas pipeline.

[0087] Among them, the flow controller refers to a device used to regulate the flow rate of inert gas filled into each battery compartment 102 by the inert gas generator 104, such as a flow control valve. In this way, the environmental parameters in each battery compartment 102 can be independently regulated, thereby realizing the decoupling of the energy storage battery safety protection system and improving the scalability of the energy storage battery safety protection system.

[0088] As an example, when the power demand is low, some battery compartments 102 or energy storage batteries need maintenance, etc., only the energy storage batteries in some battery compartments 102 can be used for power supply, so that only the battery compartments 102 containing energy storage batteries in working state can be protected, that is, the inert gas generator 104 can fill inert gas into at least one second target battery compartment 102, wherein the second target battery compartment 102 refers to the battery compartment 102 containing the energy storage battery to be started, wherein the energy storage battery to be started refers to the energy storage battery to be started. For example, after receiving the start-up instruction for energy storage battery A, energy storage battery A can be determined as the energy storage battery to be started, and then the second target battery compartment 102B to which the energy storage battery to be started belongs is determined, and the second target battery compartment 102B is filled with inert gas by the inert gas generator 104. After the inert gas is filled, the energy storage battery A is started. As an example, when the power demand increases or the battery compartment 102 is put into use after maintenance, the newly added battery compartment 102 can also be individually regulated, that is, the inert gas generator 104 can fill inert gas into at least one third target battery compartment 102, wherein the third target battery compartment 102 refers to a battery compartment 102 in which the energy storage battery to be started is placed and the environmental parameters in the battery compartment 102 are not within the preset initial environmental parameter value range. In this way, the scalability of the energy storage battery safety protection system and the energy storage system can be effectively improved. As an example, when there is an abnormality in some battery compartments 102, the environmental parameters of the battery compartment 102 with the abnormality can be regulated by the inert gas generator 104, that is, the inert gas generator 104 can fill inert gas into at least one fourth target battery compartment 102, wherein the fourth target battery compartment 102 refers to the battery compartment 102 in which the abnormality is detected.

[0089] In an exemplary embodiment, referring to Figure 6, a method for protecting the safety of energy storage batteries is provided. This embodiment uses the method applied to a terminal as an example, 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. Portable wearable devices may be smart watches, smart bracelets, head-mounted devices, 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 may be implemented through the interaction between the terminal and the server. In this embodiment, an energy storage battery safety protection system is deployed on the terminal, and the energy storage battery safety protection system includes an inert gas generator, a plurality of battery compartments, and an environmental parameter detector. The inert gas generator is connected to each battery compartment through a gas pipeline. The method includes steps S10-S20, wherein:

[0090] Step S10, when it is determined that there is at least one first target battery compartment in each battery compartment where an energy storage battery is placed, an inert gas is filled into each first target battery compartment through an inert gas generator, wherein the inert gas is used to regulate the environmental parameter values ​​in each first target battery compartment.

[0091] It should be noted that the energy storage battery safety protection method provided in this embodiment is used to control the above-mentioned energy storage battery safety protection system to perform safety protection on the energy storage battery.

[0092] S20, issuing a first safety alarm when the environmental parameter detector detects that the environmental parameter value in at least one first target battery compartment exceeds a preset environmental parameter value range.

[0093] In this embodiment, on the one hand, an inert gas generator is used to fill each first target battery compartment with inert gas, so that the energy storage battery in each first target battery compartment 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, spontaneous combustion, etc. can be prevented from the source, and the harm and loss to the energy storage battery itself and other objects and personnel can be effectively reduced. Moreover, through the inert gas generator, the unified management and delivery of the inert gas demand of multiple first target battery compartments can be achieved, the resource utilization rate is improved, and the energy storage cost of the energy storage power station is reduced. On the other hand, through the environmental parameter detector, the environmental conditions in each battery compartment can be monitored. When the environmental parameter value in at least one first target battery compartment is monitored to exceed the preset environmental parameter value range, a first safety alarm is issued, so that the relevant objects can be processed in time to reduce the safety risk of the energy storage battery. In this way, since the fire risk of energy storage batteries is lower, the battery life can be extended, and the old batteries can be fully utilized in stages, which is conducive to promoting battery recycling and the development of the energy storage industry, comprehensively improving resource utilization and reducing the energy storage cost of energy storage power stations.

[0094] 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 safety protection method further includes: issuing a first safety alarm when the inert gas concentration value in at least one first target battery compartment is monitored to be lower than a preset concentration threshold value by the inert gas detector; issuing a first safety alarm when the ambient temperature value in at least one first target battery compartment is monitored to be higher than a preset ambient temperature threshold value by the ambient temperature detector;

[0095] Through the ambient pressure detector, when the ambient pressure value in at least one first target battery compartment is monitored to be lower than a preset first ambient pressure threshold or higher than a preset second ambient pressure threshold, a first safety alarm is issued, wherein the first ambient pressure threshold is smaller than the second ambient pressure threshold.

[0096] In an exemplary embodiment, the energy storage battery safety protection system 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.

[0097] In an exemplary embodiment, the energy storage battery safety protection system also includes a battery health monitoring subsystem, which includes a battery operation data collector and a battery health monitoring module; the energy storage battery safety protection method also includes: collecting battery operation data of each energy storage battery through the battery operation data collector; detecting battery performance data of each energy storage battery based on the battery operation data through the battery health monitoring module, and issuing a second safety alarm when it is monitored that at least one battery performance data does not meet the preset battery health condition.

[0098] In an exemplary embodiment, the battery performance data includes a current battery pack internal resistance value, a current battery cell internal resistance consistency value, a current temperature consistency value, a current voltage consistency value and a current charging capacity value; the battery health monitoring module includes a battery internal resistance monitoring unit, a battery cell internal resistance consistency monitoring unit, a temperature consistency monitoring unit, a voltage consistency monitoring unit and a charging capacity monitoring unit; the energy storage battery safety protection method also includes at least one of the following: through the battery internal resistance monitoring unit, the battery pack internal resistance difference between the current battery pack internal resistance value and the preset initial battery pack internal resistance value is determined as the battery pack internal resistance change rate of the energy storage battery, and when it is monitored that the battery pack internal resistance change rate is greater than a preset first change rate threshold, a second safety alarm is issued; through the battery cell internal resistance consistency monitoring unit, the battery cell internal resistance consistency difference between the current battery cell internal resistance consistency value and the preset initial battery cell internal resistance consistency value is determined as the battery cell internal resistance consistency change rate of the energy storage battery, and when it is monitored that the battery cell internal resistance change rate is greater than a preset first change rate threshold, a second safety alarm is issued. When the resistance consistency change rate is greater than the preset second change rate threshold, a second safety alarm is issued; through the temperature consistency monitoring unit, based on the temperature consistency difference between the current temperature consistency value and the preset initial temperature consistency value, the temperature consistency change rate of the energy storage battery is determined, and when it is monitored that the temperature consistency change rate is greater than the preset third change rate threshold, a second safety alarm is issued; through the voltage consistency monitoring unit, based on the voltage consistency difference between the current voltage consistency value and the preset initial voltage consistency value, the voltage consistency change rate of the energy storage battery is determined, and when it is monitored that the voltage consistency change rate is greater than the preset fourth change rate threshold, a second safety alarm is issued; through the charging capacity monitoring unit, based on the charging capacity difference between the current charging capacity value and the preset initial charging capacity value, the charging capacity change rate of the energy storage battery is determined, and when it is monitored that the charging capacity change rate is greater than the preset fifth change rate threshold, a second safety alarm is issued.

[0099] In an exemplary embodiment, the energy storage battery safety protection system also includes a flow controller, which is arranged on each gas pipeline; the energy storage battery safety protection method also includes: through the flow controller, regulating the gas flow rate of the inert gas filled into each battery compartment by the inert gas generator.

[0100] It should be understood that, although the steps in the flowcharts involved in the above 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 is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may 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 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.

[0101] 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 safety protection method. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. 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. 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 method for protecting the safety of an energy storage battery 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.

[0102] Those skilled in the art will understand that Figure 7The 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.

[0103] 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.

[0104] 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.

[0105] 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.

[0106] 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.

[0107] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method 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.

[0108] 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.

[0109] 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 storage battery safety protection system, characterized in that: The system is applied to an energy storage power station, and includes an inert gas generator, a plurality of battery compartments and an environmental parameter detector, wherein the inert gas generator is connected to each of the battery compartments through a gas pipeline; wherein: The battery compartment is used to place energy storage batteries; The inert gas generator is used to fill inert gas into at least one first target battery compartment, wherein the first target battery compartment refers to a battery compartment in which an energy storage battery is placed; The environmental parameter detector is used to issue a first safety alarm when it detects that the environmental parameter value in at least one of the first target battery compartments exceeds 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 first safety alarm when it is detected that the inert gas concentration value in at least one of the first target battery compartments is lower than a preset concentration threshold.

2. The system 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 first safety alarm when the ambient temperature value in at least one of the first target battery compartments is detected to be higher than a preset ambient temperature threshold; The ambient air pressure detector is used to issue a first safety alarm when it monitors that the ambient air pressure value in at least one of the first target battery compartments 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 system according to claim 1, characterized in that The system also includes a battery health monitoring subsystem, and the battery health monitoring subsystem includes: A battery operation data collector, used to collect battery operation data of each of the energy storage batteries; The battery health monitoring module is used to detect the battery performance data of each of the energy storage batteries based on the battery operation data, and issue a second safety alarm when it is monitored that at least one of the battery performance data does not meet the preset battery health conditions.

4. The system according to claim 3, characterized in that The battery performance data includes the current battery pack internal resistance value, the current cell internal resistance consistency value, the current temperature consistency value, the current voltage consistency value and the current charging capacity value; the battery health monitoring module includes a battery internal resistance monitoring unit, a cell internal resistance consistency monitoring unit, a temperature consistency monitoring unit, a voltage consistency monitoring unit and a charging capacity monitoring unit; wherein: The battery internal resistance monitoring unit is used to determine the battery pack internal resistance difference between the current battery pack internal resistance value and the preset initial battery pack internal resistance value as the battery pack internal resistance change rate of the energy storage battery, and issue a second safety alarm when monitoring that the battery pack internal resistance change rate is greater than a preset first change rate threshold; The cell internal resistance consistency monitoring unit is used to determine the cell internal resistance consistency difference between the current cell internal resistance consistency value and the preset initial cell internal resistance consistency value as the cell internal resistance consistency change rate of the energy storage battery, and issue a second safety alarm when monitoring that the cell internal resistance consistency change rate is greater than a preset second change rate threshold; The temperature consistency monitoring unit is used to determine the temperature consistency change rate of the energy storage battery based on the temperature consistency difference between the current temperature consistency value and the preset initial temperature consistency value, and issue a second safety alarm when the temperature consistency change rate is greater than a preset third change rate threshold value; The voltage consistency monitoring unit is configured to determine the voltage consistency change rate of the energy storage battery based on the voltage consistency difference between the current voltage consistency value and the preset initial voltage consistency value, and issue a second safety alarm when the voltage consistency change rate is detected to be greater than a preset fourth change rate threshold; The charging capacity monitoring unit is used to determine the charging capacity change rate of the energy storage battery based on the charging capacity difference between the current charging capacity value and the preset initial charging capacity value, and to issue a second safety alarm when it is monitored that the charging capacity change rate is greater than a preset fifth change rate threshold.

5. The system according to any one of claims 1 to 4, characterized in that: The system further comprises a flow controller, which is arranged on each of the gas pipelines and is used to regulate the gas flow rate of the inert gas filled into each of the battery compartments by the inert gas generator.

6. A method for protecting energy storage batteries, characterized in that: Applied to an energy storage battery safety protection system, the energy storage battery safety protection system is applied to an energy storage power station, comprising an inert gas generator, a plurality of battery compartments and an environmental parameter detector, wherein the inert gas generator is respectively connected to each of the battery compartments through a gas pipeline; the environmental parameter detector comprises a plurality of inert gas detection groups, each inert gas detection group comprises 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; 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 there is at least one first target battery compartment in which an energy storage battery is placed in each of the battery compartments, an inert gas is filled into each of the first target battery compartments through the inert gas generator, wherein the inert gas is used to regulate the environmental parameter value in each of the first target battery compartments; When the environmental parameter detector detects that the environmental parameter value in at least one of the first target battery compartments exceeds a preset environmental parameter value range, a first safety alarm is issued; The step of issuing a first safety alarm when the environmental parameter detector detects that the environmental parameter value in at least one of the first target battery compartments exceeds a preset environmental parameter value range includes: When the inert gas detector detects that the inert gas concentration in at least one of the first target battery compartments is lower than a preset concentration threshold, a first safety alarm is issued.

7. The method according to claim 6, 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; The step of issuing a first safety alarm when the environmental parameter detector detects that the environmental parameter value in at least one of the first target battery compartments exceeds a preset environmental parameter value range includes at least one of the following: When the ambient temperature detector detects that the ambient temperature value in at least one of the first target battery compartments is higher than a preset ambient temperature threshold, a first safety alarm is issued; Through the ambient pressure detector, when the ambient pressure value in at least one of the first target battery compartments is monitored to be lower than a preset first ambient pressure threshold or higher than a preset second ambient pressure threshold, a first safety alarm is issued, wherein the first ambient pressure threshold is smaller than the second ambient pressure threshold.

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 claim 6 or 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 claim 6 or 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 claim 6 or 7 are implemented.

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