Liquid cooling system in energy storage scenario and its false alarm prevention processing method and storage medium

Abstract

The present disclosure relates to the technical field of thermal management of energy storage systems, and specifically provides a liquid cooling system in an energy storage scenario and its anti-false alarm processing method and storage medium, aiming to solve the problem of insufficient abnormality detection accuracy and easy false alarm in the liquid cooling system in the existing energy storage scenario. To this end, the anti-false alarm processing method of the liquid cooling system in the energy storage scenario provided by the present disclosure includes: for the situation where the initial parameter value has an abnormality, it is first recorded as a suspected abnormality, and the environmental state in the transmission loop is temporarily changed actively, and then the parameter value is re-measured and abnormality detection is performed based on the changed environmental state, so that the previously recorded suspected abnormal situation can be modified or confirmed. Because the environmental state in the transmission loop has changed, the two measurements before and after are not a simple addition of quantities, but are equivalent to verification at different angles under different environmental conditions, so that the accuracy of the results can be improved and false alarms can be prevented.

Description

Technical Field

[0001] The present disclosure relates to the technical field of solar cells, and specifically provides a liquid cooling system in an energy storage scenario, an anti-false alarm processing method, and a storage medium. Background Art

[0002] The containerized energy storage system is an energy storage solution that encapsulates battery packs and their supporting power conversion equipment in a standardized container. With its high integration and easy transportation and installation, the system has been widely used in many fields such as power peak regulation, smooth output of renewable energy, emergency backup power supply and power supply in remote areas. By adopting advanced battery technology and intelligent management systems, the containerized energy storage system can not only effectively improve energy utilization efficiency, but also significantly enhance the stability and reliability of the power grid.

[0003] The containerized energy storage system mainly uses a liquid cooling system to cool the battery pack in the battery pack. The liquid cooling system achieves efficient heat transfer to the battery pack by circulating coolant, thereby keeping the operating temperature of the battery pack within an appropriate range. However, the transmission circuit of the coolant is prone to abnormalities such as blockage or leakage.

[0004] At present, there are some solutions for abnormality detection of the transmission circuit of the liquid cooling system, but the accuracy is often limited and it is easy to falsely report abnormal conditions. This may affect the normal operation of the energy storage system on the one hand, and on the other hand, it is easy to reduce the trust of the operation and maintenance personnel in the abnormal results, causing the operation and maintenance personnel to gradually reduce the degree of attention to abnormal alarms, posing a safety hazard.

[0005] Therefore, there is an urgent need for a liquid cooling system in an energy storage scenario and a false alarm prevention processing method thereof to solve the problem that the abnormality detection accuracy of the liquid cooling system in the existing energy storage scenario is insufficient and false alarms are prone to occur. Summary of the invention

[0006] The present disclosure aims to solve the above technical problem, that is, to solve the problem that the abnormality detection accuracy of the existing liquid cooling system in the energy storage scenario is insufficient and false alarms are prone to occur.

[0007] In a first aspect, the present disclosure provides a method for preventing false alarms of a liquid cooling system in an energy storage scenario, wherein the liquid cooling system is used to perform thermal management on a containerized energy storage system, and the liquid cooling system comprises at least: a transmission circuit for transmitting coolant to flow through each energy storage unit in the containerized energy storage system to cool the same, and an abnormality detection subsystem; the method is applied to the abnormality detection subsystem, and comprises: obtaining parameter values ​​measured for preset detection parameters of the transmission circuit; if an initial parameter value measured when the transmission circuit is in an initial environmental state has an abnormality, recording the transmission circuit as a suspected abnormality, and controlling a temporary change in the environmental state within the transmission circuit; if an abnormality still exists in the parameter value measured when the transmission circuit is in the changed environmental state, correcting the recorded content from the suspected abnormality to a confirmed abnormality; if there is no abnormality in the parameter value measured when the transmission circuit is in the changed environmental state, correcting the recorded information from the suspected abnormality to normal.

[0008] In some exemplary embodiments, the environmental state within the transmission loop includes: a first type of environmental state, and / or a second type of environmental state; wherein the first type of environmental state changes faster than the second type of environmental state; the first type of environmental state is related to at least one of the following dimensions: flow rate, pressure, pipeline vibration frequency, pipeline vibration amplitude; the second type of environmental state is related to at least one of the following dimensions: coolant temperature, flow direction.

[0009] In some exemplary embodiments, the controlling temporarily changes the environmental state within the transmission loop, including: controlling to temporarily change a first type of environmental state within the transmission loop; if there is no abnormality in the parameter values ​​measured after the change, restoring to the initial environmental state, and controlling to temporarily change a second type of environmental state within the transmission loop; wherein, if there is still no abnormality in the parameter values ​​measured after the change, the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to be free of abnormality.

[0010] In some exemplary embodiments, the controlling temporarily changes the environmental state within the transmission loop, including: controlling to temporarily change a first type of environmental state and a second type of environmental state within the transmission loop at the same time; wherein, if there is no abnormality in the parameter values ​​measured after the change, then the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to be free of abnormality.

[0011] In some exemplary embodiments, the control temporarily changes the environmental state within the transmission loop, including: if it is necessary to control the temporary change of the first type of environmental state within the transmission loop, the change is performed step by step according to a plurality of predefined levels, and the degree of change increases with the increase of the level; if there is an abnormality in the parameter value measured after the change of any level, the change of the subsequent level is terminated, otherwise it is gradually changed to the highest level.

[0012] In some exemplary embodiments, the transmission circuit includes a pump for driving the flow of coolant; wherein, if it is necessary to control the temporary change of the flow rate and / or pressure in the transmission circuit, the control temporarily changes the environmental state in the transmission circuit, including: controlling to adjust the rotation speed of the pump; if it is necessary to control the temporary change of the flow direction in the transmission circuit: when the pump supports a bidirectional pumping function, the control temporarily changes the environmental state in the transmission circuit, including: controlling to adjust the direction in which the pump drives the coolant to flow; when the pump in the transmission circuit includes a first pump and a second pump that only support a unidirectional pumping function, the input port of the first pump is connected to the first port of the first three-way valve and the output port of the first pump is connected to the first port of the second three-way valve, and the transmission circuit in the transmission circuit The first end of the transmission pipeline is connected to the second port of the first three-way valve and the second end of the transmission pipeline is connected to the second port of the second three-way valve, the output port of the second pump is connected to the third port of the first three-way valve and the input port of the second pump is connected to the third port of the second three-way valve; wherein, in the initial environmental state, the first port and the second port of the first three-way valve are connected, the first port and the second port of the second three-way valve are connected, and the first pump is in a started state; the control temporarily changes the environmental state in the transmission loop, including: controlling the first port and the second port of the first three-way valve to be disconnected, the third port and the second port to be connected, and controlling the first port and the second port of the second three-way valve to be disconnected, the third port and the second port to be connected, and controlling the second pump to be in a started state.

[0013] In some exemplary embodiments, the liquid cooling system is a cold plate type liquid cooling system, and the transmission circuit includes a cold plate arranged in cooperation with each energy storage unit, and a transmission pipeline for cooperating with the cold plate to transport coolant, the transmission pipeline is respectively connected to the water inlet and the water outlet of the cold plate, and a solenoid valve is provided at the connection between the water inlet and the water outlet; if it is necessary to control a temporary change in the flow rate and / or pressure in the transmission circuit, the control temporarily changes the environmental state in the transmission circuit, including: when the collection point of the initial parameter value is located between the water inlet and the water outlet of the cold plate, controlling the adjustment of the opening of at least one solenoid valve.

[0014] In some exemplary embodiments, the method further includes: periodically temporarily changing the environmental state in the transmission loop, and judging whether there is an abnormality in the transmission loop according to parameter values ​​obtained by corresponding measurements.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] When the present disclosure performs abnormality detection on the transmission circuit of the liquid cooling system in the energy storage scenario, the abnormal situation of the initial parameter value measured under the initial environmental state is temporarily recorded as a suspected abnormality, and further abnormality detection is performed again after temporarily changing the environmental state of the transmission circuit, so that the previously recorded suspected abnormal situation can be modified or confirmed. Because the environmental state in the transmission circuit has changed, the two previous and subsequent measurements are not a simple addition of quantities, but are equivalent to verification from different angles under different environmental states, so the accuracy of the results can be improved and false alarms can be prevented. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The preferred embodiments of the present disclosure are described below in conjunction with the accompanying drawings, in which:

[0018] Figure 1 A schematic diagram of the architecture of a cold plate liquid cooling system provided by at least one embodiment of the present disclosure;

[0019] Figure 2 A flowchart of a method for preventing false alarms in a liquid cooling system in an energy storage scenario provided by at least one embodiment of the present disclosure;

[0020] Figure 3 A schematic diagram of the architecture of another cold plate liquid cooling system provided for at least one embodiment of the present disclosure;

[0021] Figure 4A is a schematic structural diagram of a transmission circuit with a changeable flow direction of a coolant provided by at least one embodiment of the present disclosure;

[0022] Figure 4B is a schematic diagram of driving the coolant to flow under an initial environment state provided by at least one embodiment of the present disclosure;

[0023] Figure 4C is a schematic diagram of driving the flow of coolant under a changed environmental state provided by at least one embodiment of the present disclosure;

[0024] Figure 5 is an architecture diagram of a device provided by at least one embodiment of the present disclosure;

[0025] Figure 6 It is a block diagram of an anti-false alarm processing device for a liquid cooling system in an energy storage scenario provided by at least one embodiment of the present disclosure. DETAILED DESCRIPTION

[0026] The preferred embodiments of the present disclosure are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present disclosure and are not intended to limit the protection scope of the present disclosure.

[0027] It should be noted that in the description of the present disclosure, the terms "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present disclosure. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] In addition, it should be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "setting", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, an indirect connection through an intermediate medium, or the internal connection of two elements. For those skilled in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances.

[0029] One or more battery packs are usually deployed in a containerized energy storage system. Each battery pack usually contains multiple battery packs, and each battery pack contains multiple single cells connected in series or in parallel. In this disclosure, a battery pack can be regarded as a basic energy storage unit; of course, this is only used as an example, and this disclosure does not limit the number of battery packs contained in each energy storage unit.

[0030] The liquid cooling system can be used to perform thermal management on the containerized energy storage system, such as dissipating heat from the above-mentioned energy storage unit. Based on different levels of understanding, the liquid cooling system can be regarded as part of the containerized energy storage system or as an independent thermal management system, and the present disclosure does not limit this.

[0031] There are many types of liquid cooling systems, such as immersion liquid cooling systems, cold plate liquid cooling systems, etc. If an immersion liquid cooling system is used, the above-mentioned energy storage unit needs to be immersed in the coolant so that the coolant can directly dissipate the heat from the energy storage unit. If a cold plate liquid cooling system is used, the surface of the cold plate and the energy storage unit are bonded, and the energy storage unit is cooled by the coolant flowing through the cold plate. Whether it is an immersion liquid cooling system, a cold plate liquid cooling system, or other types of liquid cooling systems, they all involve the transmission of coolant through a transmission circuit, as well as abnormality detection of the transmission circuit, such as detecting whether it has abnormalities such as blockage or leakage.

[0032] Specifically, the liquid cooling system may include:

[0033] A transmission circuit, used for transmitting coolant to flow through each energy storage unit in the containerized energy storage system to cool the same;

[0034] The abnormality detection subsystem includes a parameter measurement mechanism and an abnormality confirmation mechanism arranged in the transmission loop; wherein: the parameter measurement mechanism is used to measure the parameter value of the preset detection parameter of the transmission loop, and the abnormality confirmation mechanism is used to perform anti-false alarm processing through the anti-false alarm processing scheme disclosed in the present invention.

[0035] For ease of understanding, the specific structure of the transmission circuit is explained below by way of example in conjunction with a cold plate liquid cooling system.

[0036] like Figure 1 As shown, the transmission circuit may include: a plurality of cold plates 11, a transmission pipeline 12 and a pump 13. The transmission circuit cooperates with the abnormality detection subsystem 14 to perform thermal management on each energy storage unit 20. In order to make the illustrated content more concise and clear, Figure 1 For the cold plate 11, transmission pipeline 12 and energy storage unit 20 that appear repeatedly, only one of them is marked, but those skilled in the art can clearly understand the meaning of the other unmarked graphics. For example, Figure 1 A total of six cold plates 11 and corresponding energy storage units 20 are shown, and each cold plate 11 is configured with a corresponding energy storage unit 20 . For example, the cold plate 11 may be located on the upper surface of the corresponding energy storage unit 20 to cool the corresponding energy storage unit 20 .

[0037] The cooling of the energy storage unit 20 by the cold plate 11 is mainly achieved based on the coolant flowing through the inside of the cold plate 11. The relatively low-temperature coolant flows into the cold plate 11 to cool down the energy storage unit 20 and absorb the heat from the energy storage unit 20, thereby forming a relatively high-temperature coolant and flowing out of the cold plate 11. Then, after being cooled, the relatively high-temperature coolant is reformed into a relatively low-temperature coolant, and the above cooling process for the energy storage unit 20 is repeated in a cycle.

[0038] The transmission pipeline 12 and the pump 13 are used to cooperate to realize the circulation of the coolant, wherein the transmission pipeline 12 is used to cooperate with the cold plate 11 to transport the coolant, and the pump 13 is used to drive the coolant to flow. Specifically, the pump 13 can pump relatively low-temperature coolant from the outside to the transmission pipeline 12, and then transport it to the cold plate 11 by the transmission pipeline 12. In addition, the relatively low-temperature coolant cools the energy storage unit 20 at the cold plate 11 and absorbs heat from the energy storage unit 20, thereby forming a relatively high-temperature coolant, which is then pumped to the outside by the pump 13 through the transmission pipeline 12, so as to be re-cooled to form the above-mentioned relatively low-temperature coolant.

[0039] If the number of energy storage unit 20 and cold plate 11 is only one, instead of Figure 1 If there are 6 or other numbers as shown, the structure of the transmission pipeline 12 will be relatively simple, and will only include one input pipeline and one output pipeline, wherein: one end of the input pipeline is connected to the input port A of the pump 13, and the other end is connected to the input port of the cold plate 11, so as to assist the pump 13 in transporting the relatively low-temperature coolant to the cold plate 11, and one end of the output pipeline is connected to the output port of the cold plate 11, and the other end is connected to the output port B of the pump 13, so as to assist the pump 13 in outputting the relatively high-temperature coolant from the cold plate 11 to the outside.

[0040] However, if there are multiple energy storage units 20, the structure of the transmission pipeline 12 may be relatively complex. Of course, if each energy storage unit 20 corresponds to a completely independent transmission pipeline 12 and pump 13, then the structure of each set of transmission pipelines 12 is similar to the above-described situation of "there is only one energy storage unit 20 and cold plate 11". However, for the sake of cost control and improving management concentration, a unified transmission pipeline 12 is usually used to match multiple energy storage units 20.

[0041] Typically, each energy storage unit 20 will be as follows Figure 1 In the manner shown, the mounting brackets are installed longitudinally in sequence in the container to form a plurality of longitudinal groups. Figure 1 The six energy storage units 20 shown can be divided into two groups, that is, the three energy storage units 20 on the left belong to one group, and the three energy storage units 20 on the right belong to another group. Then, the transmission pipeline 12 can include a primary pipeline 121, a secondary pipeline 122 and a tertiary pipeline 123. Among them:

[0042] The primary pipeline 121 is directly connected to the pump 13, for example, the primary input pipeline 121a is connected to the input port A of the pump 13, and the primary output pipeline 121b is connected to the output port B of the pump 13. Its function is to cooperate with the pump 13 to input relatively low-temperature coolant into the system and output relatively high-temperature coolant from the system to the outside.

[0043] The number of the secondary pipelines 122 is consistent with the number of energy storage units 20. For example, Figure 1 If there are two groups of energy storage units 20, there are two sets of secondary pipelines 122. Each set of secondary pipelines 122 is independently connected to the primary pipeline 121, specifically connected to the primary input pipeline 121a through the secondary input pipeline 122a, so as to transport the relatively low-temperature coolant from the primary input pipeline 121a further toward the corresponding group of energy storage units 20, and connected to the primary output pipeline 121b through the secondary output pipeline 122b, so as to transport the relatively high-temperature coolant to the primary output pipeline 121b.

[0044] The number of the tertiary pipelines 123 is consistent with the number of the energy storage units 20. For example, Figure 1 The tertiary pipeline 123 includes 6 sets of tertiary pipelines 123, which correspond to 6 energy storage units 20. Each set of tertiary pipelines 123 is independently connected to the secondary pipelines 122 corresponding to the group in which it is located, specifically connected to the secondary input pipeline 122a of the corresponding secondary pipeline 122 through the tertiary input pipeline 123a, so as to transport the relatively low-temperature coolant from the secondary input pipeline 122a to the cold plate 11 connected to it, and connected to the secondary output pipeline 122b of the corresponding secondary pipeline 122 through the tertiary output pipeline 123b, so as to transport the relatively high-temperature coolant from the cold plate 11 connected to it to the secondary output pipeline 122b.

[0045] In addition, the connection method between the transmission pipeline 12 and the pump 13 is not limited to the above description. Also, the number of pumps 13 is not limited, for example, there can be multiple pumps. This will be described in detail below in conjunction with the embodiments, and will not be repeated here.

[0046] Whether it is the connection between the transmission pipeline 12 and the pump 13, the connection between the transmission pipeline 12 and the cold plate 11, or the various joints inside the transmission pipeline 12 (such as the connection between the pipelines at each level), in short, leakage may occur at various interfaces or other parts of the transmission circuit. Furthermore, the transmission pipeline 12 and the cold plate 11 may also produce rust particles due to self-corrosion, the coolant contains impurities, etc. In short, any position of the transmission circuit, especially relatively narrow or curved places, may be blocked. However, existing technologies often make it difficult to detect these anomalies in a timely and accurate manner.

[0047] The abnormality detection subsystem 14 can detect abnormalities such as leakage or blockage in the transmission circuit. For example, a flow measurement mechanism 141, a pressure difference measurement mechanism 142, etc. can be provided on the transmission pipeline 12, but the present disclosure is not limited to this. In fact, any mechanism capable of realizing abnormality detection and corresponding detection strategy can be used by the abnormality detection subsystem 14 to realize abnormality detection for the transmission circuit.

[0048] For example, the flow measurement mechanism 141 may include any sensor or device that can be used to measure the real-time flow data of the transmission pipeline 12. For example, the flow measurement mechanism 141 may be a flow sensor. Similarly, the differential pressure measurement mechanism 142 may include any sensor or device that can be used to measure the real-time differential pressure data of the transmission pipeline 12. For example, the differential pressure measurement mechanism 142 may include a first pressure sensor 142a disposed at the input port A of the pump 13 and a second pressure sensor 142b disposed at the output port B of the pump 13 (corresponding to the coolant circuit at the system level described below), and the processing mechanism 140 may obtain the real-time differential pressure data by performing a difference calculation on the pressure values ​​respectively measured by the two. For another example, the differential pressure measurement mechanism 142 may also include a differential pressure sensor, which can directly output the real-time differential pressure data without the cooperation of the processing mechanism 140.

[0049] The processing mechanism 140 may include any type of processing device or processing module, which may run a computer program based on a general-purpose processor such as a CPU to implement the processing logic of the abnormality detection and processing method disclosed herein. Of course, the processing mechanism 140 may also include a dedicated processor or a programmable logic device (PLD) such as an FPGA (Field Programmable Gate Array) with the above-mentioned processing logic burned in, and the present disclosure is not limited to this.

[0050] The processing mechanism 140 can determine whether there is an abnormality based on the real-time flow data measured by the flow measurement mechanism 141 or the real-time pressure difference data measured by the pressure difference measurement mechanism 142, or can make a judgment based on both. Of course, as mentioned above, the present disclosure does not limit the specific detection strategy adopted by the processing mechanism 140.

[0051] For example, the processing unit 140 may compare the real-time flow data with a predefined abnormal flow data value range. If the value of the real-time flow data falls within the abnormal flow data value range, it is determined that the transmission pipeline 12 is blocked or leaking.

[0052] Assuming that the real-time flow data includes: the real-time flow value Q and the value of the flow change rate d△Q of any transmission pipeline section in the transmission pipeline 12, the corresponding flow data abnormal value range includes: the flow value abnormal value range and the flow change rate abnormal value range. Then:

[0053] In one embodiment, it is possible to determine whether any of the transmission pipeline sections is blocked based on the real-time flow value Q. For example, if the value of the real-time flow value Q falls within the abnormal flow value range, it is determined that the cold plate liquid cooling system is blocked at any of the transmission pipeline sections; wherein the flow value described by the abnormal flow value range is smaller than the normal flow value.

[0054] Among them, any transmission pipeline section can be located, for example, at least one of the following: between the water inlet and the water outlet of the primary pipeline in the transmission pipeline 12, Figure 1 For example, it is equivalent to the system-level coolant circuit composed of the entire transmission pipeline 12 and all cold plates 11; between the water inlet and the water outlet of any secondary pipeline in the transmission pipeline 12, that is, the group-level coolant circuit composed of the secondary pipeline corresponding to a group of energy storage units, all tertiary pipelines and all cold plates; between the water inlet and the water outlet of any tertiary pipeline in the transmission pipeline 12, that is, the unit-level coolant circuit composed of the tertiary pipeline corresponding to a certain energy storage unit and the cold plate.

[0055] Then, those skilled in the art can choose to detect the above-mentioned system-level coolant circuit according to actual needs, or can detect one or more group-level coolant circuits, or can detect one or more unit-level coolant circuits, and the present disclosure does not limit this. Even, the detection of the coolant circuits at the system level, group level and unit level can be deployed at the same time, but in specific operation, only the detection of the coolant circuit at the system level can be started in the daily process, and the detection of the coolant circuit at the group level can be started when an abnormality is found to determine the group with the abnormality, and then the detection of the coolant circuit at the unit level can be started for the group with the abnormality. In this way, the detection overhead can be minimized during daily operation, and after the abnormality occurs, the range of the abnormal point can be gradually narrowed until accurate positioning is achieved.

[0056] Taking a liquid cooling system of a specific structure as an example, it is assumed that the liquid cooling system contains any of the above-mentioned transmission pipeline sections, and the standard flow value (i.e., normal flow value) of any of the transmission pipeline sections under normal circumstances is Q0, and the determined abnormal flow value range is [0, 0.95Q0). Then, if the value of the real-time flow value Q satisfies 0≤Q<0.95Q0, it can be determined that any of the transmission pipeline sections is blocked; and if the value of the real-time flow value Q satisfies Q>0.95Q0, it is necessary to further combine other real-time flow data or other types of parameters (such as the real-time pressure difference data, automatic liquid replenishment data, etc. described below) for further judgment.

[0057] In another embodiment, it is possible to determine whether any of the transmission pipeline sections is blocked or leaked based on the flow rate change rate d△Q, that is, it is possible to determine that any of the transmission pipeline sections must be abnormal, but it is impossible to determine whether the abnormality is a blockage or a leak. For example, if the value of the flow rate change rate d△Q falls within the abnormal flow rate change value range, it is determined that the cold plate liquid cooling system has a blockage or a leak at any of the transmission pipeline sections; wherein the flow rate change rate described in the abnormal flow rate change value range is greater than the normal flow rate change rate.

[0058] Taking a liquid cooling system of a specific structure as an example, assuming that the liquid cooling system contains any of the above-mentioned transmission pipeline sections, and the flow value change rate (i.e., normal flow change rate) of any of the transmission pipeline sections under normal circumstances is less than 8.0 LPM (Liter Per Minute, liters per minute), then the abnormal flow change rate value range determined is [8.0, +∞). Then, if the value of the flow change rate d△Q satisfies d△Q≥8.0LPM, it can be determined that any of the transmission pipeline sections is blocked or leaking; and if the value of the real-time flow value Q satisfies d△Q<8.0LPM, it is necessary to further combine other real-time flow data or other types of parameters (such as the real-time pressure difference data, automatic liquid replenishment data, etc. described below) for further judgment.

[0059] If the real-time flow data includes both the real-time flow value Q and the flow change rate d△Q of any transmission pipeline section, then: as long as the real-time flow value Q falls within the abnormal flow value range, or the flow change rate d△Q falls within the abnormal flow change rate range, a judgment can be made based on the above embodiment, and the two are relatively independent.

[0060] If the value of the real-time flow data does not fall within the abnormal value range of the flow data, the abnormal value range of the pressure difference data matching the real-time flow data is determined, and compared with the real-time pressure difference data measured at any transmission pipeline section: if the value of the real-time pressure difference data falls within the abnormal value range of the pressure difference data, it is determined that the cold plate liquid cooling system has a blockage or leakage at any transmission pipeline section.

[0061] As mentioned above, the value of the real-time flow data may not fall within the abnormal value range of the flow data, but this may be because there is no abnormality in any transmission pipeline section, or it may be because the abnormality in any transmission pipeline section is not reflected in the value of the real-time flow data. Therefore, it can be further judged in combination with the real-time pressure difference data.

[0062] The combination of real-time flow data and real-time differential pressure data is reflected in that the value of real-time flow data can be used to determine the abnormal value range of the above-mentioned differential pressure data. In other words, the value of real-time flow data can not only be used alone to determine whether there is an abnormality in any of the transmission pipeline sections, but can also be used in conjunction with the real-time differential pressure data to make further judgments on whether there is an abnormality in any of the transmission pipeline sections. Therefore, the real-time flow data and the real-time differential pressure data respectively characterize the real-time status of any transmission pipeline section from different dimensions, so that the present disclosure can judge whether there is an abnormality in any of the transmission pipeline sections from multiple dimensions. No matter which dimension identifies the abnormality, it is equivalent to making up for the possible misjudgment or missed judgment in another dimension, thereby improving the timeliness and accuracy of abnormality detection in the final result.

[0063] At the same time, based on the coordination relationship between real-time flow data and real-time pressure difference data, the present invention first makes a judgment based on the real-time flow data, and then makes a judgment based on the real-time pressure difference data when no abnormality is detected, thereby realizing a multi-level abnormality detection scheme, which can not only improve the timeliness and accuracy of abnormality detection, but also once the real-time flow data can detect the abnormality, it is no longer necessary to continue to combine the real-time pressure difference data for detection, so that in the process of detecting abnormality based on real-time flow data, there is no need to process the real-time pressure difference data, and there is no need to measure the real-time pressure difference data. The real-time pressure difference data can be measured or processed only when needed, thereby helping to reduce the overhead caused by corresponding measurement, processing and other operations.

[0064] As mentioned above, this can be done by Figure 1 The pressure difference measuring mechanism 142 shown acquires real-time pressure difference data, wherein the real-time pressure difference data may refer to any data that can describe the real-time pressure difference of any of the above transmission pipeline sections, such as one or more of the real-time pressure difference value ΔP, pressure difference change rate dΔP and other physical quantities.

[0065] Assuming that the real-time differential pressure data includes the real-time differential pressure value △P and the differential pressure change rate d△P of any transmission pipeline section, the corresponding differential pressure data abnormal value range includes: the differential pressure value blockage abnormal value range, the differential pressure value leakage abnormal value range and the differential pressure change rate abnormal value range. Then:

[0066] In one embodiment, if the value of the real-time pressure difference value △P falls within the pressure difference value blockage abnormal value range, it is determined that the cold plate liquid cooling system is blocked at any of the transmission pipeline sections; wherein the pressure difference value described by the pressure difference value blockage abnormal value range is greater than the normal pressure difference value.

[0067] Taking a liquid cooling system with a specific structure as an example, assuming that the liquid cooling system includes any of the above-mentioned transmission pipeline sections, a mapping relationship between the standard pressure difference value (i.e., normal pressure difference value) of any transmission pipeline section under normal circumstances and the real-time flow data (such as real-time flow value Q or flow change rate d△Q) can be generated in advance. For example, through curve fitting and the like, a change curve of the standard pressure difference value of any transmission pipeline section under normal circumstances relative to the real-time flow data can be determined, so that the corresponding standard pressure difference value can be determined based on the above-mentioned real-time flow data, and then the corresponding abnormal value range of the pressure difference data can be determined.

[0068] For example, if the standard pressure difference value of any transmission pipeline section under normal conditions is determined to be △P0 according to the real-time flow data, the corresponding pressure difference value blockage abnormality value range can be [1.05△P0, +∞). Then, if the real-time pressure difference value △P satisfies △P>1.05△P0, it can be determined that there is a blockage at any transmission pipeline section.

[0069] In another embodiment, if the value of the real-time pressure difference value △P falls into the pressure difference value leakage abnormal value range, it is determined that the cold plate liquid cooling system has a leakage at any of the transmission pipeline sections; wherein the pressure difference value described by the pressure difference value leakage abnormal value range is smaller than the normal pressure difference value.

[0070] For example, if the standard pressure difference value of any transmission pipeline section under normal conditions is determined to be △P0 according to the real-time flow data, the corresponding pressure difference value leakage abnormality value range can be [0, 0.8△P0). Then, if the value of the real-time pressure difference value △P satisfies △P<0.8△P0, it can be determined that there is a leakage at any transmission pipeline section.

[0071] In another embodiment, if the value of the pressure difference change rate d△P falls within the abnormal pressure difference change rate value range, it is determined that the cold plate liquid cooling system has either blockage or leakage at any of the transmission pipeline sections; wherein the pressure difference change rate described by the abnormal pressure difference change rate value range is greater than the normal pressure difference change rate.

[0072] For example, if it is determined based on real-time flow data that the standard pressure difference change rate (i.e., normal pressure difference change rate) of any transmission pipeline section under normal conditions is less than 8.0 kpa / s, then the corresponding pressure difference change rate abnormal value range can be [8.0, +∞). Then, if the value of the pressure difference change rate d△P satisfies d△P≥8.0 kpa / s, it can be determined that there is a blockage or leakage at any transmission pipeline section.

[0073] In addition to the above-mentioned abnormality detection based on real-time flow data and real-time pressure difference data, the technical solution of the present disclosure can also be further implemented in combination with automatic fluid replenishment volume data.

[0074] From the perspective of system architecture, the liquid cooling system may also include: an automatic liquid replenishing mechanism for automatically replenishing liquid into the liquid cooling system. Figure 1 Taking the automatic refilling mechanism 15 as an example, the automatic refilling mechanism 15 may include a refilling pump 150 and a refilling pipeline 151. The refilling pump 150 may input the coolant for refilling into the transmission pipeline 12 via the refilling pipeline 151, for example Figure 1 Specifically, the first-level input pipeline 121a in the first-level pipeline 121 is input thereto, but the present disclosure is not limited to this.

[0075] Correspondingly, the processing mechanism 140 is also used to: obtain automatic fluid replenishment volume data for the coolant in the transmission pipeline 12, and compare the automatic fluid replenishment volume data with a predefined abnormal fluid replenishment volume value range. If the value of the automatic fluid replenishment volume data falls within the abnormal fluid replenishment volume value range, it is determined that the cold plate liquid cooling system has a leak at any of the transmission pipeline sections.

[0076] For example, the processing mechanism 140 may include a fluid replenishment amount measuring mechanism, and measure the above-mentioned automatic fluid replenishment amount data accordingly. The fluid replenishment amount measuring mechanism may include any sensor or device that can be used to measure the fluid replenishment amount, such as a flow sensor 143 disposed on the fluid replenishment pipeline 151, or a liquid level sensor disposed in a supplementary coolant storage tank (storing coolant for fluid replenishment), etc., and the present disclosure is not limited to this.

[0077] Assuming that the automatic fluid replenishment volume data includes: the single fluid replenishment volume L and the total number of fluid replenishment times N within a preset time, the corresponding fluid replenishment volume abnormal value range may include: the single fluid replenishment volume abnormal value range and the total number of fluid replenishment times abnormal value range. Then:

[0078] In one embodiment, if the value of the single fluid replenishment volume L falls within the abnormal single fluid replenishment volume value range, it is determined that the cold plate liquid cooling system has a leak at any of the transmission pipe sections; wherein the single fluid replenishment volume described by the abnormal single fluid replenishment volume value range is greater than the normal single fluid replenishment volume.

[0079] Taking a liquid cooling system of a specific structure as an example, assuming that the value of a single liquid replenishment volume under normal circumstances (i.e., the normal single liquid replenishment volume) is less than 2.0L, the determined abnormal value range of the single liquid replenishment volume is [2.0, +∞). Then, if the value of the single liquid replenishment volume L satisfies L≥2.0, it can be determined that there is a leak in any transmission pipeline section.

[0080] In another embodiment, if the value of the total number of fluid replenishments N falls within the abnormal value range of the total number of fluid replenishments, it is determined that the cold plate liquid cooling system has a leak at any of the transmission pipe sections; wherein the total number of fluid replenishments described by the abnormal value range of the total number of fluid replenishments is greater than the normal total number of fluid replenishments corresponding to the preset time length.

[0081] Taking a liquid cooling system of a specific structure as an example, assuming that the total number of refills under normal circumstances (i.e., the normal total number of refills) is less than 2 / 12h (i.e., the total number of refills within 12 hours is less than 2), the determined abnormal value range of the total number of refills is [2, +∞). Then, if the value of the total number of refills N within 12 hours satisfies N≥2, it can be determined that there is a leak in any transmission pipeline section.

[0082] It can be seen that as a supplement to the aforementioned embodiment, that is, based on the real-time flow data and the real-time pressure difference data, the automatic fluid replenishment volume data can provide a basis for judgment in more dimensions. Therefore, when the abnormality cannot be detected in the flow and pressure difference dimensions, it is still possible to identify the abnormality based on the fluid replenishment volume, which helps to further improve the timeliness and accuracy of detecting abnormal conditions.

[0083] The above example illustrates an embodiment of abnormality detection on a transmission circuit of a liquid cooling system. However, the abnormality detection result may contain a false positive.

[0084] In view of this, the embodiment of the present disclosure provides a liquid cooling system in an energy storage scenario and a method for preventing false alarms thereof, which can be implemented through the above-mentioned abnormality detection subsystem 14: in the case of abnormal initial parameter values, first record it as a suspected abnormality, and actively temporarily change the environmental state in the transmission loop, and then re-measure and detect the abnormality of the parameter values ​​based on the changed environmental state, so that the previously recorded suspected abnormal situation can be modified or confirmed. Because the environmental state in the transmission loop has changed, the two measurements before and after are not a simple addition of quantities, but are equivalent to verification at different angles under different environmental conditions, so the accuracy of the results can be improved and false alarms can be prevented.

[0085] Next, the liquid cooling system and the method for preventing false alarms in the energy storage scenario provided by the embodiments of the present disclosure are introduced.

[0086] Figure 2 The flowchart of the false alarm prevention processing method implemented by the abnormality detection subsystem 14 (specifically, the processing mechanism 140) is shown. The method may include the following steps:

[0087] Step 202: Acquire parameter values ​​obtained by measuring preset detection parameters of the transmission loop.

[0088] As mentioned above, the preset detection parameter can be any parameter that can be used to determine whether there is an abnormality in the transmission circuit, such as at least one of the aforementioned real-time flow data, real-time pressure difference data, automatic fluid replenishment volume data, etc., and the present disclosure does not limit this.

[0089] The measurement operation for the preset detection parameters can be periodic. For example, the measurement is repeated continuously according to the predefined period T to obtain the corresponding parameter values. Among them, if there are multiple preset detection parameters, their respective measurement cycles can be the same or relatively independent (in the case of independence, the specific values ​​may be different or coincidentally the same). For each preset detection parameter, the measured parameter value includes the initial parameter value under the initial environmental state, and also includes the following parameter value under the changed environmental state.

[0090] Step 204: If there is an abnormality in the initial parameter value measured when the transmission loop is in the initial environmental state, the transmission loop is recorded as a suspected abnormality, and the environmental state in the transmission loop is controlled to be temporarily changed.

[0091] In the case of an abnormality in the initial parameter value, the present disclosure does not directly confirm that the transmission loop is abnormal, but takes into account the possibility of a false alarm, first records it as a suspected abnormality, and further judges the suspected abnormality to determine whether it is really an abnormality or a false alarm. Compared with directly judging it as an abnormality, for the case of a false alarm, it can avoid executing the corresponding abnormality handling operation and affecting the normal business of the energy storage system.

[0092] In particular, since the environmental conditions within the transmission loop have changed, the two measurements are not a simple addition of quantities, but are equivalent to verification at different angles under different environmental conditions. This can improve the accuracy of the results and prevent false alarms.

[0093] Step 206a: If the parameter values ​​measured when the transmission loop is in the changed environmental state still have an abnormality, the recorded content is corrected from the suspected abnormality to a confirmed abnormality.

[0094] Step 206b: If there is no abnormality in the parameter values ​​measured when the transmission loop is in the changed environmental state, the recorded information is corrected from the suspected abnormality to normal.

[0095] The environmental conditions within the transmission loop may include: flow rate, pressure, pipeline vibration frequency, pipeline vibration amplitude, coolant temperature, flow direction, etc. Any attributes in the transmission loop that can affect the parameter values ​​of the above-mentioned preset detection parameters can be used as the environmental conditions here, and the present disclosure does not limit this.

[0096] In one embodiment, since it is necessary to temporarily change the environmental state in the transmission loop, it can be classified according to the change speed, for example, it can be divided into a first type of environmental state and a second type of environmental state, and compared with the two types of environmental states: the change speed of the first type of environmental state is relatively fast, while the change speed of the second type of environmental state is relatively slow. Of course, the environmental state of the transmission loop can only include the first type of environmental state or the second type of environmental state, or it can also include the first type of environmental state and the second type of environmental state at the same time. For example, a time threshold can be defined, for the first type of environmental state, the change time required to change the first type of environmental state from the initial environmental state and reach the adjustment target (taking the flow size as an example, from the initial flow to the target flow value), does not exceed the above-mentioned time threshold; and for the second type of environmental state, the change time required to change the second type of environmental state from the initial environmental state and reach the adjustment target (taking the flow direction as an example, from the initial direction to the reverse direction), is greater than the above-mentioned time threshold.

[0097] For example, the first type of environmental state may be related to at least one of the following dimensions: flow rate, pressure, pipeline vibration frequency, and pipeline vibration amplitude; and the second type of environmental state may be related to at least one of the following dimensions: coolant temperature and flow direction.

[0098] Due to the difference in the change speed, if one wishes to temporarily change the environmental state in the transmission loop by combining the first type of environmental state and the second type of environmental state, a variety of combined methods may be used.

[0099] In one embodiment, the change can be made based on the first type of environmental state with a relatively faster change speed to achieve a quick review of suspected abnormalities. If the abnormality is confirmed, there is no need to continue to review based on the second type of environmental state, thereby improving the processing efficiency of preventing false alarms. If the abnormality is not confirmed, the review can be further performed based on the second type of environmental state with a relatively slower change speed, which can further improve the accuracy of preventing false alarms.

[0100] Specifically, the first type of environmental state in the transmission loop can be controlled to be temporarily changed; if there is no abnormality in the parameter values ​​measured after the change, the initial environmental state is restored, and the second type of environmental state in the transmission loop is controlled to be temporarily changed; wherein, if there is still no abnormality in the parameter values ​​measured after the change, the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to be free of abnormality.

[0101] Take the flow dimension involved in the first type of environmental state and the flow direction involved in the second type of environmental state as an example. For a liquid cooling system with a specific structure, it is assumed that the liquid cooling system contains any of the above-mentioned transmission pipeline sections, and the standard flow value (i.e., normal flow value) of any of the transmission pipeline sections under the initial environmental state is Q0, and the determined abnormal flow value range is [0, 0.95Q0). Then, if the value of the real-time flow value Q1 measured under the initial environmental state satisfies 0≤Q1<0.95Q0, it can be recorded that any of the transmission pipeline sections is suspected of being blocked.

[0102] Furthermore, the flow rate of any transmission pipeline section can be changed first, for example, the flow rate can be increased to temporarily change the environmental state, and it is assumed that the standard flow value under the changed environmental state is Q0'=1.2Q0, and the corresponding abnormal flow value range is [0, 0.95Q0']. Then, if the value of the real-time flow value Q2 measured under the initial state satisfies 0≤Q2<0.95Q0', it can be confirmed that any transmission pipeline section is blocked.

[0103] If the value of the real-time flow value Q2 does not satisfy 0≤Q2<0.95Q0', the flow can be reduced to restore to the above-mentioned initial environmental state, and the flow direction of the coolant in any transmission pipeline section can be reversed. And, after the flow direction is reversed, since the flow remains unchanged, the value of the standard flow value under the changed environmental state is still Q0, and the determined abnormal flow value range is [0, 0.95Q0). Then, if the value of the real-time flow value Q3 under the changed environmental state satisfies 0≤Q3<0.95Q0, it can be confirmed that any transmission pipeline section is blocked, otherwise it is considered that the suspected blockage initially recorded is a false alarm, and no blockage actually occurs.

[0104] In addition to increasing the flow rate, the flow rate can also be reduced. That is, in the embodiment of the present disclosure, when adjusting the dimensions related to the environmental state, it is not limited to adjusting them to be relatively larger or relatively smaller, as long as the environmental state can be changed.

[0105] In another embodiment, the first type of environmental state and the second type of environmental state in the transmission loop can be controlled to be temporarily changed at the same time; wherein, if there is no abnormality in the parameter values ​​measured after the change, the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to be free of abnormality.

[0106] Take the flow dimension involved in the first type of environmental state and the flow direction involved in the second type of environmental state as an example. For a liquid cooling system with a specific structure, it is assumed that the liquid cooling system contains any of the above-mentioned transmission pipeline sections, and the standard flow value (i.e., normal flow value) of any of the transmission pipeline sections under the initial environmental state is Q0, and the determined abnormal flow value range is [0, 0.95Q0). Then, if the value of the real-time flow value Q1 measured under the initial environmental state satisfies 0≤Q1<0.95Q0, it can be recorded that any of the transmission pipeline sections is suspected of being blocked.

[0107] Furthermore, the flow rate of any transmission pipeline section and the flow direction of the coolant therein can be changed at the same time, for example, the flow rate can be increased and the flow direction can be reversed to temporarily change the environmental state, and it is assumed that the standard flow value under the changed environmental state is Q0'=1.2Q0, and the corresponding abnormal flow value range is [0, 0.95Q0']. Then, if the value of the real-time flow value Q4 measured under the initial state satisfies 0≤Q2<0.95Q0', it can be confirmed that any transmission pipeline section is blocked, otherwise it is considered that the suspected blockage initially recorded is a false alarm, and no blockage actually occurs.

[0108] In various embodiments of the present disclosure, if it is necessary to control the temporary change of the first type of environmental state in the transmission loop, since the first type of environmental state changes very quickly, in order to minimize the impact on the energy storage business, the change can be gradually made according to a plurality of predefined levels, and the degree of change increases with the increase of the level; if there is an abnormality in the parameter value measured after the change of any level, the change of the subsequent level is terminated, otherwise it is gradually changed to the highest level.

[0109] Still taking the above flow rate as an example, assuming that there are two predefined levels, if the standard flow rate value under the initial environment state is Q0, then the standard flow rate value after the first level change may be Q0_1'=1.1Q0, and the standard flow rate value after the second level change may be Q0_2'=1.2Q0, that is, the degree of change is gradually increased by 10%.

[0110] Take the above scheme of first changing based on the first type of environmental state and then changing based on the second type of environmental state as an example. In the first round of processing, the flow rate can be increased by 10% based on the initial environmental state. If the value of the real-time flow value Q1_1 measured under the initial state satisfies 0≤Q1_1<0.95Q0_1', it can be confirmed that any transmission pipeline section is blocked. Otherwise, the flow rate is increased by 20% based on the initial environmental state. If the value of the real-time flow value Q1_2 measured under the initial state satisfies 0≤Q1_2<0.95Q0_2', it can be confirmed that any transmission pipeline section is blocked. Otherwise, further processing is performed in combination with the second type of environmental state, which will not be repeated here.

[0111] Of course, the present disclosure does not limit the number of levels that are set, the size of the differences between the levels, etc.

[0112] For the transmission circuit, the changes in the flow rate and pressure therein are usually consistent: if more coolant is input into the transmission circuit per unit time, the flow rate and pressure will be greater; if less coolant is input into the transmission circuit per unit time, the flow rate and pressure will be smaller. Then, if it is necessary to temporarily change the flow rate and / or pressure of the entire transmission circuit, the pump used to drive the flow of coolant in the transmission circuit can be controlled, such as by specifically controlling and adjusting the speed of the pump: when the speed of the pump is higher, more coolant can be input into the transmission circuit per unit time, thereby increasing the flow rate and pressure; and, when the speed of the pump is lower, less coolant can be input into the transmission circuit per unit time, thereby reducing the flow rate and pressure.

[0113] As for the aforementioned cold plate liquid cooling system, in addition to being able to temporarily change the flow rate and / or pressure of the entire transmission circuit, since the interior of the cold plate is usually a high-risk area for abnormalities, there is a need to temporarily change the flow rate and / or pressure inside a single cold plate. For example, the transmission circuit includes a cold plate arranged in conjunction with each energy storage unit, and a transmission pipeline for conveying coolant in conjunction with the cold plate, the transmission pipeline is respectively connected to the water inlet and outlet of the cold plate, and a solenoid valve is provided at the connection between the water inlet and the outlet. Then: when the collection point of the initial parameter value is located between the water inlet and the outlet of the cold plate, the opening of at least one solenoid valve is controlled and adjusted.

[0114] Combination Figure 3As shown, the transmission pipeline 12 is respectively connected to the water inlet and the water outlet of the cold plate 11 (for example, the tertiary input pipeline 123a is connected to the water inlet of the cold plate 11, and the tertiary output pipeline 123b is connected to the water outlet of the cold plate 11), and a solenoid valve 111 is provided at the water inlet of the cold plate 11. Accordingly, when the location where the initial parameter value is collected is located between the water inlet and the water outlet of the cold plate 11, the processing mechanism 140 can adjust the opening of the solenoid valve 111 by control: for example, by increasing the opening of the solenoid valve 111 to increase the flow rate and pressure in the transmission circuit, or by reducing the opening of the solenoid valve 111 to reduce the flow rate and pressure in the transmission circuit.

[0115] As mentioned above, the flow rate and pressure in the transmission circuit can be adjusted by controlling the speed of the pump. In addition, if the pump used has the ability to pump in both directions, the pumping direction of the pump can be controlled to change the direction in which it drives the coolant to flow. For example, if the rotation direction of the motor in the pump can be changed by changing the power supply phase sequence or using a reversible motor controller, the pumping direction of the coolant can be changed, thereby changing the flow direction of the coolant in the transmission circuit.

[0116] Of course, if the pump in the transmission loop does not support bidirectional pumping capability, the flow direction can be changed by other means.

[0117] In one embodiment, two pumps may be assembled in the transmission circuit, the input port of the first pump being connected to the first port of the first three-way valve and the output port of the first pump being connected to the first port of the second three-way valve, the first end of the transmission line being connected to the second port of the first three-way valve and the second end of the transmission line being connected to the second port of the second three-way valve, and the output port of the second pump being connected to the third port of the first three-way valve and the input port of the second pump being connected to the third port of the second three-way valve.

[0118] In the initial environment, the first port and the second port of the first three-way valve are connected, the first port and the second port of the second three-way valve are connected, the third port of the first three-way valve and the other ports are not connected, and the third port of the second three-way valve and the other ports are not connected. Then, by starting the first pump, the coolant can be driven from the input port of the first pump (via the first port and the second port of the first three-way valve) to flow into the first end of the transmission pipeline, and from the second end of the transmission pipeline (via the second port and the first port of the second three-way valve) back to the output port of the first pump. In this process, the second pump is idle and can be turned on or off to save resources.

[0119] When the flow direction needs to be changed, the first port of the first three-way valve is controlled to be disconnected from the second port, and the third port of the first three-way valve is connected to the second port, and the first port of the second three-way valve is controlled to be disconnected from the second port, and the third port of the second three-way valve is connected to the second port, so that the first port of the first three-way valve is no longer connected to other ports, and the first port of the second three-way valve is no longer connected to other ports. Then, by starting the second pump, the coolant can be driven to flow from the input port of the second pump (via the third port and the second port of the second three-way valve) into the second end of the transmission pipeline, and from the second end of the transmission pipeline (via the second port and the third port of the first three-way valve) back to the output port of the second pump. In this process, the first pump is idle and can be turned on or off to save resources.

[0120] by Figure 4A-4C For example. Figure 4A The figure shows the connection relationship between the pump, the transmission pipeline and the three-way valve. Figure 4A As shown, the pump includes a first pump 13a and a second pump 13b. The first pump 13a includes an input port A1 and an output port B1, and the second pump 13b includes an input port A2 and an output port B2. The three-way valve includes a first three-way valve 41 and a second three-way valve 42. The first three-way valve 41 includes a first port 411, a second port 412 and a third port 413, and the second three-way valve 42 includes a first port 421, a second port 422 and a third port 423. The first end of the transmission pipeline is end a and the second end is end b. Among them, the first port 411 of the first three-way valve 41 is connected to the input port A1 of the first pump 13a, the second port 412 of the first three-way valve 41 is connected to the end a of the transmission pipeline, and the third port 413 of the first three-way valve 41 is connected to the output port B2 of the second pump 13b, the first port 421 of the second three-way valve 42 is connected to the output port B1 of the first pump 13a, the second port 422 of the second three-way valve 42 is connected to the end b of the transmission pipeline, and the third port 423 of the second three-way valve 42 is connected to the input port A2 of the second pump 13b.

[0121] In the initial environment, if Figure 4B As shown in the figure: the first port 411 and the second port 412 of the first three-way valve 41 are connected, so that the first pump 13a is connected from the input port A1 to the end a of the transmission pipeline, and accordingly the coolant is input into the transmission pipeline; and the first port 421 and the second port 422 of the second three-way valve 42 are connected, so that the first pump 13a is connected from the output port B1 to the end b of the transmission pipeline, and accordingly the coolant is extracted from the transmission pipeline. It can be seen that in the initial environment state, the coolant circulation in the counterclockwise direction is realized based on the first pump 13a. For details, please refer to Figure 4B The second pump 13b is not connected to the transmission pipeline and does not participate in the circulation of the coolant.

[0122] Under the changed environmental conditions, such as Figure 4C As shown: the first port 421 and the second port 422 of the second three-way valve 42 are disconnected, and the second port 422 and the third port 423 of the second three-way valve 42 are connected, so that the second pump 13b is connected from the input port A2 to the b end of the transmission pipeline, and the coolant is input into the transmission pipeline accordingly; and the first port 411 and the second port 412 of the first three-way valve 41 are disconnected, and the second port 412 and the third port 413 of the first three-way valve 41 are connected, so that the second pump 13b is connected from the output port B2 to the a end of the transmission pipeline, and the coolant is extracted from the transmission pipeline accordingly. It can be seen that under the changed environmental state, the coolant circulation in the clockwise direction is realized based on the second pump 13b. For details, please refer to Figure 4C The first pump 13a is not connected to the transmission pipeline and does not participate in the circulation of the coolant.

[0123] In addition to reviewing a suspected abnormality in a transmission loop by temporarily changing the environmental state of the transmission loop, this idea of ​​improving detection accuracy based on changes in environmental states can also be directly used in the process of abnormality detection in the transmission loop.

[0124] Therefore, even if the initial parameter values ​​measured under the initial environmental conditions do not show abnormalities, the environmental conditions in the transmission loop can still be temporarily changed periodically, and the transmission loop can be judged to show abnormalities according to the corresponding parameter values ​​measured. In this way, abnormality detection can be performed on the transmission loop under differentiated environmental conditions from time to time, and inspections from different angles can be achieved during the normal abnormality detection process, especially for relatively small or early leakage points, blockage points and other abnormal conditions that are not easy to detect. Based on the above method, the probability of finding abnormalities can be increased, or at least it can help to find abnormalities relatively earlier, which improves the accuracy of abnormality detection as a whole.

[0125] Among them, the so-called periodic temporary change of the environmental state in the transmission loop, the specific change cycle used can be set according to actual needs, and the present disclosure does not limit this. For example, within the first time period after each confirmation of an abnormality and completion of the abnormality processing, a relatively short change cycle T1 can be used to strengthen detection, and the results of the abnormality processing can be observed accordingly; if an abnormality is detected within the first time period, the timing is restarted after the abnormality processing is completed. If no abnormality is detected within the first time period, it is considered that there is no problem with the previous abnormality processing, and after the first time period ends, a relatively longer change cycle T2 can be used to reduce the additional overhead caused by changing the environmental state.

[0126] In summary, when the present disclosure performs abnormality detection on the transmission circuit of the liquid cooling system in the energy storage scenario, the abnormal initial parameter values ​​measured under the initial environmental state are temporarily recorded as suspected abnormalities, and further abnormality detection is performed again after temporarily changing the environmental state of the transmission circuit, so that the previously recorded suspected abnormalities can be modified or confirmed. Because the environmental state in the transmission circuit has changed, the two previous and subsequent measurements are not a simple addition of quantities, but are equivalent to verification from different angles under different environmental states, so the accuracy of the results can be improved and false alarms can be prevented.

[0127] Figure 5 is a schematic structural diagram of a device provided by an exemplary embodiment. Figure 5 At the hardware level, the device includes a processor 502, an internal bus 504, a network interface 506, a memory 508, and a non-volatile memory 510, and may also include hardware required for other functions. One or more embodiments of this specification may be implemented based on software, such as the processor 502 reading the corresponding computer program from the non-volatile memory 510 into the memory 508 and then running it. Of course, in addition to the software implementation, one or more embodiments of this specification do not exclude other implementations, such as logic devices or a combination of software and hardware, etc., that is, the execution subject of the following processing flow is not limited to each logic unit, but can also be hardware or logic devices.

[0128] Please refer to Figure 6 , the anti-false alarm processing device of the liquid cooling system in the energy storage scenario can be applied to Figure 5 The liquid cooling system is used for thermal management of the containerized energy storage system, and the liquid cooling system at least comprises: a transmission circuit for transmitting cooling liquid to flow through each energy storage unit in the containerized energy storage system to cool it, and an abnormality detection subsystem; the device is applied to the abnormality detection subsystem, and comprises:

[0129] A parameter value measuring unit 601 is configured to obtain a parameter value obtained by measuring a preset detection parameter of the transmission loop;

[0130] A temporary state control unit 602, which records the transmission loop as a suspected abnormality and controls to temporarily change the environmental state in the transmission loop if the initial parameter value measured when the transmission loop is in the initial environmental state is abnormal;

[0131] The record correction unit 603 corrects the recorded content from the suspected abnormality to the confirmed abnormality if there is still an abnormality in the parameter values ​​measured when the transmission loop is in the changed environmental state; if there is no abnormality in the parameter values ​​measured when the transmission loop is in the changed environmental state, the recorded information is corrected from the suspected abnormality to normal.

[0132] Optionally, the environmental state in the transmission loop includes:

[0133] A first type of environmental state, and / or a second type of environmental state; wherein the first type of environmental state changes faster than the second type of environmental state;

[0134] The first type of environmental state is related to at least one of the following dimensions: flow rate, pressure, pipeline vibration frequency, and pipeline vibration amplitude;

[0135] The second type of environmental state is related to at least one of the following dimensions: coolant temperature and flow direction.

[0136] Optionally, the temporary state control unit 602 is specifically configured to:

[0137] Controlling to temporarily change a first type of environmental state within the transmission loop;

[0138] If there is no abnormality in the parameter value measured after the change, the initial environmental state is restored, and the second type of environmental state in the transmission loop is temporarily changed;

[0139] If the parameter values ​​measured after the change still do not have any abnormality, then the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to have no abnormality.

[0140] Optionally, the temporary state control unit 602 is specifically configured to:

[0141] Controlling to temporarily change a first type of environmental state and a second type of environmental state in the transmission loop at the same time;

[0142] If there is no abnormality in the parameter value measured after the change, then the parameter value measured when the transmission loop is in the changed environmental state is determined to be free of abnormality.

[0143] Optionally, the temporary state control unit 602 is specifically configured to:

[0144] If it is necessary to control the temporary change of the first type of environmental state in the transmission loop, the change is gradually performed according to a plurality of predefined levels, and the degree of change increases with the increase of the level;

[0145] If the parameter value measured after any level change is abnormal, the subsequent level change is terminated, otherwise it is gradually changed to the highest level.

[0146] Optionally, the transmission circuit includes a pump for driving the flow of coolant; wherein,

[0147] If it is necessary to control the temporary change of the flow rate and / or pressure in the transmission circuit, then optionally, the temporary state control unit 602 is specifically used to: control and adjust the rotation speed of the pump;

[0148] To control a temporary change in the flow direction in the transmission circuit:

[0149] In the case where the pump supports a bidirectional pumping function, the temporary state control unit 602 is specifically used to: control and adjust the direction in which the pump drives the coolant to flow;

[0150] In the case where the pump in the transmission loop includes a first pump and a second pump that only support a one-way pumping function, the input port of the first pump is connected to the first port of the first three-way valve and the output port of the first pump is connected to the first port of the second three-way valve, the first end of the transmission pipeline in the transmission loop is connected to the second port of the first three-way valve and the second end of the transmission pipeline is connected to the second port of the second three-way valve, the output port of the second pump is connected to the third port of the first three-way valve and the input port of the second pump is connected to the third port of the second three-way valve; wherein, in the initial environment state, the first port and the second port of the first three-way valve are connected, the first port and the second port of the second three-way valve are connected, and the first pump is in a startup state; the temporary state control unit 602 is specifically used for:

[0151] The first three-way valve is controlled to be disconnected from the first port and connected to the second port, and the second three-way valve is controlled to be disconnected from the first port and connected to the second port, and the second pump is controlled to be in a starting state.

[0152] Optionally, the liquid cooling system is a cold plate type liquid cooling system, the transmission circuit includes a cold plate arranged in cooperation with each energy storage unit, and a transmission pipeline for cooperating with the cold plate to transport coolant, the transmission pipeline is respectively connected to the water inlet and the water outlet of the cold plate, and a solenoid valve is provided at the connection between at least one of the water inlet and the water outlet;

[0153] If it is necessary to control the temporary change of the flow rate and / or pressure in the transmission circuit, the temporary state control unit 602 is specifically used to:

[0154] In a case where the location for collecting the initial parameter value is located between the water inlet and the water outlet of the cold plate, the opening of at least one solenoid valve is controlled and adjusted.

[0155] Optionally, also include:

[0156] The periodic state control unit 604 periodically and temporarily changes the environmental state in the transmission loop, and determines whether the transmission loop is abnormal according to the parameter values ​​obtained by corresponding measurements.

[0157] The present disclosure also proposes a computer-readable storage medium on which computer instructions are stored. When the instructions are executed by a processor, the steps described in any of the above embodiments are implemented to realize the processing logic of the anti-false alarm processing method of the liquid cooling system in the energy storage scenario of the present disclosure.

[0158] There are a few points to note:

[0159] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to the general design;

[0160] (2) For the sake of clarity, in the drawings used to describe the embodiments of the present disclosure, the thickness of the layers or regions is enlarged or reduced, that is, these drawings are not drawn according to the actual scale;

[0161] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to obtain new embodiments.

[0162] The above is only a specific implementation of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present disclosure, which should be included in the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A method for preventing false alarms in a liquid cooling system in an energy storage scenario, characterized in that: The liquid cooling system is used for thermal management of a containerized energy storage system, and the liquid cooling system comprises at least: a transmission circuit for transmitting a coolant to flow through each energy storage unit in the containerized energy storage system to cool the energy storage unit, and an abnormality detection subsystem; the method is applied to the abnormality detection subsystem, and comprises: Obtaining parameter values ​​obtained by measuring preset detection parameters of the transmission loop; If there is an abnormality in the initial parameter value measured when the transmission loop is in the initial environmental state, the transmission loop is recorded as a suspected abnormality, and the environmental state in the transmission loop is actively controlled to be temporarily changed; If the parameter value measured when the transmission loop is in the changed environmental state still has an abnormality, the recorded content is corrected from the suspected abnormality to a confirmed abnormality; If there is no abnormality in the parameter value measured when the transmission loop is in the changed environmental state, the recorded information is corrected from the suspected abnormality to normal; The environmental state in the transmission loop includes: a first type of environmental state, and / or a second type of environmental state; wherein the first type of environmental state changes faster than the second type of environmental state; the first type of environmental state is related to at least one of the following dimensions: flow rate, pressure, pipeline vibration frequency, pipeline vibration amplitude; the second type of environmental state is related to at least one of the following dimensions: coolant temperature, flow direction; The transmission circuit includes a pump for driving the flow of coolant; wherein, If it is necessary to control the temporary change of the flow rate and / or pressure in the transmission circuit, the control actively temporarily changes the environmental state in the transmission circuit, including: controlling and adjusting the rotation speed of the pump; To control a temporary change in the flow direction in the transmission circuit: In the case where the pump supports a bidirectional pumping function, the controlling actively temporarily changes the environmental state in the transmission loop, including: controlling to adjust the direction in which the pump drives the coolant to flow; In the case where the pumps in the transmission loop include a first pump and a second pump that only support a unidirectional pumping function, the input port of the first pump is connected to the first port of the first three-way valve and the output port of the first pump is connected to the first port of the second three-way valve, the first end of the transmission pipeline in the transmission loop is connected to the second port of the first three-way valve and the second end of the transmission pipeline is connected to the second port of the second three-way valve, the output port of the second pump is connected to the third port of the first three-way valve and the input port of the second pump is connected to the third port of the second three-way valve; wherein, in the initial environmental state, the first port and the second port of the first three-way valve are connected, the first port and the second port of the second three-way valve are connected, and the first pump is in a startup state; the control actively changes the environmental state in the transmission loop temporarily, including: The first three-way valve is controlled to be disconnected from the first port and connected to the second port, and the second three-way valve is controlled to be disconnected from the first port and connected to the second port, and the second pump is controlled to be in a starting state.

2. The method according to claim 1, characterized in that The controlling actively temporarily changes the environmental state in the transmission loop, including: Controlling to temporarily change a first type of environmental state within the transmission loop; If there is no abnormality in the parameter value measured after the change, the initial environmental state is restored, and the second type of environmental state in the transmission loop is temporarily changed; If the parameter values ​​measured after the change still do not have any abnormality, then the parameter values ​​measured when the transmission loop is in the changed environmental state are determined to have no abnormality.

3. The method according to claim 1, characterized in that The controlling actively temporarily changes the environmental state in the transmission loop, including: Controlling to temporarily change a first type of environmental state and a second type of environmental state in the transmission loop at the same time; If there is no abnormality in the parameter value measured after the change, then the parameter value measured when the transmission loop is in the changed environmental state is determined to be free of abnormality.

4. The method according to claim 2 or 3, characterized in that: The controlling actively temporarily changes the environmental state in the transmission loop, including: If it is necessary to control the temporary change of the first type of environmental state in the transmission loop, the change is gradually performed according to a plurality of predefined levels, and the degree of change increases with the increase of the level; If the parameter value measured after any level change is abnormal, the subsequent level change is terminated, otherwise it is gradually changed to the highest level.

5. The method according to claim 2 or 3, characterized in that: The liquid cooling system is a cold plate type liquid cooling system, the transmission circuit includes a cold plate arranged in cooperation with each energy storage unit, and a transmission pipeline for conveying coolant in cooperation with the cold plate, the transmission pipeline is respectively connected to the water inlet and the water outlet of the cold plate, and a solenoid valve is provided at the connection of at least one of the water inlet and the water outlet; If it is necessary to control the temporary change of the flow rate and / or pressure in the transmission loop, the control actively temporarily changes the environmental state in the transmission loop, including: In a case where the location for collecting the initial parameter value is located between the water inlet and the water outlet of the cold plate, the opening of at least one solenoid valve is controlled and adjusted.

6. The method according to claim 1, characterized in that Also includes: The environmental state in the transmission loop is temporarily changed regularly and proactively, and it is determined whether the transmission loop is abnormal based on the parameter values ​​obtained by corresponding measurements.

7. A liquid cooling system, characterized in that: Used for thermal management of containerized energy storage systems, the liquid cooling system includes: A transmission circuit, used for transmitting coolant to flow through each energy storage unit in the containerized energy storage system to cool the same; The anomaly detection subsystem includes a parameter measurement mechanism and an anomaly confirmation mechanism arranged in the transmission loop; wherein: the parameter measurement mechanism is used to measure the parameter value of the preset detection parameter of the transmission loop, and the anomaly confirmation mechanism is used to perform anti-false alarm processing through the method described in any one of claims 1-6.

8. A computer-readable storage medium, characterized in that: Computer instructions are stored thereon, and when the instructions are executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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