A valve-regulated lead-acid battery gas evolution anomaly detection system and method

Abstract

The application discloses a kind of valve-regulated lead-acid battery gas evolution abnormality detection system and detection method, system includes valve-regulated lead-acid battery group, multiple overflow valves, multiple gas evolution detection modules and processor, valve-regulated lead-acid battery group includes multiple series valve-regulated lead-acid battery body;Overflow valve is set on valve-regulated lead-acid battery body;Gas evolution detection module is covered on overflow valve, processor is electrically connected with each gas evolution detection module;Overflow valve discharges the gas evolution generated by valve-regulated lead-acid battery body;Gas evolution detection module detects gas evolution component signal and gas evolution concentration signal, and carries out signal processing, determines the gas evolution density of valve-regulated lead-acid battery body;Processor receives the gas evolution density of each valve-regulated lead-acid battery body sent by each gas evolution detection module, determines the valve-regulated lead-acid battery body of gas evolution abnormality.Using the above system, the quality of valve-regulated lead-acid battery body is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of valve-regulated lead-acid batteries, and in particular to a valve-regulated lead-acid battery gas evolution anomaly detection system and a detection method. Background Art

[0002] Due to the inconsistency of the manufacturing process and materials of the valve-regulated lead-acid battery itself, the valve opening pressure of the overflow valve of the valve-regulated lead-acid battery is not completely consistent during actual use, resulting in inconsistent exhaust time and exhaust volume of the valve-regulated lead-acid battery, causing inconsistent degradation rates of each valve-regulated lead-acid battery, resulting in inconsistent overall status of the valve-regulated lead-acid battery pack, which is an important reason why the valve-regulated lead-acid battery pack cannot reach the project operation period. Therefore, discovering individual abnormally exhausted valve-regulated lead-acid batteries in the valve-regulated lead-acid battery pack as soon as possible and replacing the abnormal valve-regulated lead-acid batteries in time are key technologies to ensure the safe and stable operation of the valve-regulated lead-acid battery pack.

[0003] In order to ensure the overall degradation rate of the valve-regulated lead-acid battery pack and realize the safe and stable operation of the valve-regulated lead-acid battery pack, there is an urgent need for a method that can detect the abnormal gas evolution discharged by each valve-regulated lead-acid battery in the valve-regulated lead-acid battery pack, so as to quickly find the valve-regulated lead-acid battery with abnormal gas evolution and avoid valve-regulated lead-acid battery failure caused by degradation of the valve-regulated lead-acid battery pack. Summary of the Invention

[0004] The present invention provides a valve-regulated lead-acid battery gas evolution anomaly detection system and detection method, so as to quickly identify valve-regulated lead-acid batteries with gas evolution anomalies, avoid valve-regulated lead-acid battery failures caused by deterioration of the valve-regulated lead-acid battery pack, ensure the safe and stable operation of the valve-regulated lead-acid battery pack, and extend the service life of the valve-regulated lead-acid battery pack.

[0005] In a first aspect, the present invention provides a valve-regulated lead-acid battery gassing anomaly detection system, comprising a valve-regulated lead-acid battery pack, multiple overflow valves, multiple gassing detection modules, and a processor. The valve-regulated lead-acid battery pack comprises multiple valve-regulated lead-acid battery bodies connected in series; the number of valve-regulated lead-acid battery bodies is the same as the number of overflow valves and the number of gassing detection modules.

[0006] The overflow valve is provided on the valve-regulated lead-acid battery body; the gas analysis detection module covers the overflow valve, and the processor is electrically connected to each gas analysis detection module;

[0007] The overflow valve is used to discharge the gas generated by the valve-regulated lead-acid battery body to the gas detection module; the gas detection module is used to detect the gas composition signal and the gas concentration signal of the gas, and to process the gas composition signal and the gas concentration signal to determine the gas density of the valve-regulated lead-acid battery body; the processor is used to receive the gas density of the valve-regulated lead-acid battery body sent by each gas detection module, and to determine the valve-regulated lead-acid battery body with abnormal gas according to the gas density of each valve-regulated lead-acid battery body.

[0008] Optionally, the gas detection module comprises a gas collection box, a gas sensor, an air inlet hole and an air outlet hole, the gas collection box contains a cavity, and the cavity is used to cover the overflow valve; the air inlet hole is arranged on one side of the gas collection box close to the cavity, the air outlet hole is arranged on the side of the gas collection box away from the cavity, and the gas sensor is arranged inside the gas collection box and located on the gas flow path;

[0009] The air inlet hole is used to introduce the gas discharged by the overflow valve into the gas collection box, and the air outlet hole is used to discharge the gas from the gas collection box; the gas sensor is used to detect the gas composition signal and the gas concentration signal of the gas, and to send the gas composition signal and the gas concentration signal to the processor.

[0010] Optionally, the gas detection module further comprises a signal conversion unit and a signal processing unit; the signal conversion unit is electrically connected with the gas sensor, the signal conversion unit and the signal processing unit are electrically connected, and each signal processing unit is electrically connected with the processor;

[0011] The signal conversion unit is used to convert the gas composition signal and the gas concentration signal into digital signals and send them to the signal processing unit; the signal processing unit is used to receive the digital signals and determine the gas density of the valve-regulated lead-acid battery body according to the digital signals.

[0012] Optionally, the gas detection module further comprises a filter amplification unit;

[0013] The filter amplification unit is electrically connected between the signal conversion unit and the gas sensor, and is used to filter and amplify the gas composition signal and the gas concentration signal, so that the amplified gas composition signal and the gas concentration signal are sent to the signal conversion unit.

[0014] Optionally, the number of air outlet holes is greater than or equal to 2; the gas detection module further comprises a sensor sealing cover;

[0015] The sensor sealing cover is located on the side of the gas collection box away from the cavity, and each air outlet hole is uniformly distributed between the peripheral area of the gas collection box and the sensor sealing cover;

[0016] The sensor sealing cover is detachably connected with the gas collection box.

[0017] Optionally, the gas analysis detection module further comprises a collection box sealing ring;

[0018] The collection box sealing ring is located between the gas analysis collection box and the valve-regulated lead-acid battery body, and is used to ensure that the gas analysis collection box is tightly attached to the valve-regulated lead-acid battery body to completely cover the overflow valve.

[0019] Optionally, the system further comprises a display module;

[0020] The display module is electrically connected to the processor; and the processor is further configured to control the display module to display the gas evolution density of each valve-regulated lead-acid battery body after receiving the gas evolution density of each valve-regulated lead-acid battery body.

[0021] Optionally, the system further comprises an alarm module;

[0022] The alarm module is electrically connected to the processor; and the processor is further configured to control the alarm module to alarm after determining the valve-regulated lead-acid battery body with abnormal gas evolution.

[0023] In a second aspect, the present application provides a valve-regulated lead-acid battery gas evolution abnormality detection method, which is characterized in that being executed based on the valve-regulated lead-acid battery gas evolution abnormality detection system described above, and comprising the following steps:

[0024] Receiving the gas evolution density of each valve-regulated lead-acid battery body sent by each gas analysis detection module;

[0025] Determining the valve-regulated lead-acid battery body with abnormal gas evolution according to the gas evolution density of each valve-regulated lead-acid battery body.

[0026] Optionally, determining the valve-regulated lead-acid battery body with abnormal gas evolution according to the gas evolution density of each valve-regulated lead-acid battery body comprises:

[0027] Determining the average gas evolution density, the maximum gas evolution density and the minimum gas evolution density of each valve-regulated lead-acid battery body according to the gas evolution density of each valve-regulated lead-acid battery body;

[0028] Determining the first difference value between the maximum gas evolution density and the average gas evolution density, and the second difference value between the average gas evolution density and the minimum gas evolution density according to the average gas evolution density, the maximum gas evolution density and the minimum gas evolution density;

[0029] Determining the gas evolution abnormality of the valve-regulated lead-acid battery body corresponding to the maximum gas evolution density when the first difference value is greater than a preset gas evolution density limit;

[0030] Determining the gas evolution abnormality of the valve-regulated lead-acid battery body corresponding to the minimum gas evolution density when the second difference value is greater than a preset gas evolution density limit.

[0031] The technical scheme of the present application sets the gas analysis detection module above the overflow valve, so that the gas generated by the valve-regulated lead-acid battery body can be quickly discharged to the gas analysis detection module when it is discharged through the overflow valve. The gas analysis detection module detects the gas composition signal and the gas concentration signal of the gas, and processes the detected signals to determine the gas density of the valve-regulated lead-acid battery body. The determined gas density of each valve-regulated lead-acid battery body is sent to the processor, which analyzes and processes the determined gas density of each valve-regulated lead-acid battery body to determine the valve-regulated lead-acid battery body with abnormal gas. The above system quickly determines the valve-regulated lead-acid battery with abnormal gas, avoids valve-regulated lead-acid battery failure caused by degradation of the valve-regulated lead-acid battery pack, ensures safe and stable operation of the valve-regulated lead-acid battery pack, and improves the quality and service life of the valve-regulated lead-acid battery pack.

[0032] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present application, nor is it intended to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0034] Figure 1 A structure diagram of a valve-regulated lead-acid battery gas abnormality detection system provided by the embodiment of the present application;

[0035] Figure 2 A structure diagram of a valve-regulated lead-acid battery pack provided by the embodiment of the present application;

[0036] Figure 3 A structure diagram of a valve-regulated lead-acid battery body provided by the embodiment of the present application;

[0037] Figure 4 A structure diagram of a gas analysis detection module provided by the embodiment of the present application;

[0038] Figure 5 A top view of a gas analysis detection module provided by the embodiment of the present application;

[0039] Figure 6 A side view of a gas detection module according to an embodiment of the present application is provided;

[0040] Figure 7 A schematic diagram of the physical structure of a gas detection module according to an embodiment of the present application is provided;

[0041] Figure 8 A schematic diagram of the connection relationship of a valve-regulated lead-acid battery gas anomaly detection system according to an embodiment of the present application is provided;

[0042] Figure 9 A schematic diagram of a second valve-regulated lead-acid battery gas anomaly detection system according to an embodiment of the present application is provided;

[0043] Figure 10 A flowchart of a valve-regulated lead-acid battery gas anomaly detection method according to an embodiment of the present application is provided;

[0044] Figure 11 A flowchart of a second valve-regulated lead-acid battery gas anomaly detection method according to an embodiment of the present application is provided. DETAILED DESCRIPTION

[0045] In order to make the technical personnel in the art better understand the present application scheme, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor should be within the scope of protection of the present application.

[0046] It should be noted that the terms "first", "second" and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0047] In an embodiment, Figure 1 A schematic diagram of a valve-regulated lead-acid battery gas anomaly detection system according to an embodiment of the present application is provided, Figure 2A structure schematic diagram of a valve-regulated lead-acid battery pack is provided for an embodiment of the present application, Figure 3 A structure schematic diagram of a valve-regulated lead-acid battery body is provided for an embodiment of the present application, which can be applied to detect the gas evolution of the valve-regulated lead-acid battery body to quickly determine the condition of the valve-regulated lead-acid battery body with abnormal gas evolution, such as Figures 1 to 3 As shown in the figure, the system comprises a valve-regulated lead-acid battery pack 1, a plurality of gas overflow valves 2, a plurality of gas evolution detection modules 3 and a processor 4, the valve-regulated lead-acid battery pack 1 comprises a plurality of valve-regulated lead-acid battery bodies 11 connected in series; the number of valve-regulated lead-acid battery bodies 11 is the same as the number of gas overflow valves 2 and the number of gas evolution detection modules 3; the gas overflow valves 2 are arranged on the valve-regulated lead-acid battery bodies 11; the gas evolution detection modules 3 cover the gas overflow valves 2, and the processor 4 is electrically connected with each gas evolution detection module 3; the gas overflow valves 2 are used to discharge the gas evolution generated by the valve-regulated lead-acid battery bodies 11 to the gas evolution detection modules 3; the gas evolution detection modules 3 are used to detect the gas evolution component signal and the gas evolution concentration signal of the gas evolution, and perform signal processing on the gas evolution component signal and the gas evolution concentration signal to determine the gas evolution density of the valve-regulated lead-acid battery bodies 11; the processor 4 is used to receive the gas evolution density of each valve-regulated lead-acid battery body 11 sent by each gas evolution detection module 3, and determine the valve-regulated lead-acid battery body 11 with abnormal gas evolution according to the gas evolution density of each valve-regulated lead-acid battery body 11.

[0048] The valve-regulated lead acid battery (VRLA) 1 is a sealed lead-acid battery that utilizes a pressure relief valve, or overflow valve 2, to control the release of internal gas, thereby achieving sealing. The VRLA battery 1 comprises multiple VRLA battery cells 11 connected in series, each of which consists of a single cell. The overflow valve 2, also known as a safety valve, automatically opens to release gas when the internal gas pressure of the VRLA battery 11 exceeds a certain value, then automatically closes to prevent air from entering the battery 11. This design ensures the sealing of the VRLA battery 11, preventing acid leakage and preventing moisture and impurities from entering the battery, thereby protecting the performance and lifespan of the VRLA battery 11. The gassing detection module 3 is used to detect and process the signal of gassing generated by the VRLA battery 11 to determine the density of the gas released by the VRLA battery 11. Typically, each VRLA battery 11 is equipped with a relief valve 2 and a gassing detection module 3 mounted on the relief valve 2. The processor 4, the core control unit of the detection system, is responsible for receiving the gas evolution density of the VRLA battery 11 from the gas evolution detection module 3 and identifying VRLA batteries 11 with abnormal gassing based on the gas evolution density.

[0049] Before introducing the technical solution of the present embodiment, the background technology of the valve-regulated lead-acid battery pack 1 is briefly described first. Under normal circumstances, the valve-regulated lead-acid battery body 11 is widely used as a backup power supply for the secondary DC power supply system of a substation because of its high safety and high stability. Because the voltage of the secondary DC power supply system of a substation is generally divided into two types of 110V or 220V, and the large-capacity valve-regulated lead-acid battery body 11 adopts a monomer structure, the rated voltage of a single battery is only 2V. Therefore, when the valve-regulated lead-acid battery body 11 is used as a backup power supply for the secondary DC power supply system of a substation, 54 single cells or 108 single cells are generally connected in series to form a group for use. Figure 2 As shown, B1, B2, ..., Bn represent series-connected valve-regulated lead-acid battery bodies 11. The positive and negative electrodes of the series-connected valve-regulated lead-acid battery pack 1 are respectively connected to a DC bus. The DC bus is connected to the mains via an AC / DC charger.

[0050] In the operation of the substation secondary DC power supply system, 220V AC mains power supplies the DC bus through the AC / DC charger, and provides a small current for float charging or a large current for equalization charging to the valve-regulated lead-acid battery pack 1, so as to maintain the voltage stability of the valve-regulated lead-acid battery pack 1, so as to achieve the backup capability of the valve-regulated lead-acid battery pack 1. When the valve-regulated lead-acid battery pack 1 is in the process of large-current equalization charging, the active material inside the valve-regulated lead-acid battery body 11 will undergo a series of chemical reactions, and the external provided electrical energy will be stored in the form of chemical energy. The chemical equation of this process is: 2PbSO4+2H2O=Pb+PbO2+2H2SO4. It can be seen that the valve-regulated lead-acid battery pack 1 involves sulfuric acid, water and lead compounds in the chemical reaction during charging and discharging. When the valve-regulated lead-acid battery pack 1 is overcharged and long-term overvoltage float charging or large-current equalization charging, the electrolytic water degradation reaction will occur due to the lack of active material inside the valve-regulated lead-acid battery body 11. The chemical equation of this process is 2H2O=2O2↑+2H2↑.

[0051] Reference Figure 3 When the above electrolytic water phenomenon is slight, the gas pressure inside the valve-regulated lead-acid battery body 11 is small, and the overflow valve 2 will not open, so that the hydrogen and oxygen ions generated by the above chemical reaction cannot be discharged and are stored in the electrolyte, waiting for the valve-regulated lead-acid battery body 11 to be charged to return to the water state after the reversible reaction. When the valve-regulated lead-acid battery body 11 is overcharged, the gas pressure generated inside the valve-regulated lead-acid battery body 11 is greater than the control threshold of the overflow valve 2, and the internal gas can be discharged to the outside through the overflow valve 2, thereby preventing the phenomenon of abnormal pressure inside the valve-regulated lead-acid battery body 11 from causing the expansion of the valve-regulated lead-acid battery body 11. Therefore, the overflow valve 2 is an important structure to ensure the normal pressure inside the valve-regulated lead-acid battery body 11, and the quality of the valve-regulated lead-acid battery body 11 can be determined according to the gas, i.e. gas evolution, discharged by the overflow valve 2.

[0052] To determine the gas evolution of each valve-regulated lead-acid battery body 11 in the valve-regulated lead-acid battery pack 1, the embodiment sets a gas evolution detection module 3 on each overflow valve 2, and makes the gas evolution detection module 3 completely cover the overflow valve 2. After the active material in the valve-regulated lead-acid battery body 11 reacts chemically to produce gas evolution, the gas evolution is discharged through the overflow valve 2, enters the gas evolution detection module 3, and the gas evolution detection module 3 detects the gas evolution composition signal and the gas evolution concentration signal of the gas evolution, wherein the gas evolution composition signal can include sulfuric acid, water and lead compounds, and the gas evolution concentration signal is the percentage of the gas evolution composition in air. After the gas evolution detection module 3 detects the gas evolution composition signal and the gas evolution concentration signal of the corresponding valve-regulated lead-acid battery body 11, it processes the detected gas evolution composition signal and gas evolution concentration signal, converts the gas evolution composition signal and gas evolution concentration signal into digital signals, processes the converted digital signals, determines the gas evolution density of the valve-regulated lead-acid battery body 11, and sends the gas evolution density of the valve-regulated lead-acid battery body 11 to the processor 4. After the processor 4 receives the gas evolution density of each valve-regulated lead-acid battery body 11 sent by each gas evolution detection module 3, it calculates and processes the gas evolution density of each valve-regulated lead-acid battery body 11 according to the gas evolution density of each valve-regulated lead-acid battery body 11, and finally determines the valve-regulated lead-acid battery body 11 with abnormal gas evolution.

[0053] The technical scheme of the embodiment of the application sets a gas evolution detection module, and covers the gas evolution detection module above the overflow valve, so that when the gas evolution generated by the valve-regulated lead-acid battery body is discharged through the overflow valve, it can be quickly discharged to the gas evolution detection module. The gas evolution detection module detects the gas evolution composition signal and the gas evolution concentration signal of the gas evolution, processes the detected gas evolution composition signal and gas evolution concentration signal, determines the gas evolution density of the valve-regulated lead-acid battery body, sends the gas evolution density of each valve-regulated lead-acid battery body to the processor, and the processor analyzes and processes the determined gas evolution density of each valve-regulated lead-acid battery body after receiving the gas evolution density of each valve-regulated lead-acid battery body, and finally determines the determined valve-regulated lead-acid battery body with abnormal gas evolution. Using the above system, the valve-regulated lead-acid battery with abnormal gas evolution is quickly determined, the valve-regulated lead-acid battery failure caused by the deterioration of the valve-regulated lead-acid battery pack is avoided, the safe and stable operation of the valve-regulated lead-acid battery pack is ensured, and the quality and service life of the valve-regulated lead-acid battery pack are improved.

[0054] In another specific embodiment, optionally, Figure 4 A structural schematic diagram of a gas evolution detection module provided by the embodiment of the application, Figure 5 A top view of a gas evolution detection module provided by the embodiment of the application,Figure 6 A side view of a gas analysis detection module provided by an embodiment of the present application, Figure 7 A schematic diagram of the physical structure of a gas analysis detection module provided by an embodiment of the present application, referring to Figures 4 to 7 As shown in the figure, the gas analysis detection module 3 comprises a gas analysis collection box 31, a gas sensor 32, an air inlet hole 33 and an air outlet hole 34. The gas analysis collection box 31 contains a cavity 311, which is used to cover the overflow valve 2. The air inlet hole 33 is arranged on the side of the gas analysis collection box 31 close to the cavity 311, and the air outlet hole 34 is arranged on the side of the gas analysis collection box 31 away from the cavity 311. The gas sensor 32 is arranged inside the gas analysis collection box 31 and located on the path of the gas analysis flow. The air inlet hole 33 is used to make the gas analysis discharged by the overflow valve 2 enter the gas analysis collection box 31, and the air outlet hole 34 is used to discharge the gas analysis from the gas analysis collection box 31. The gas sensor 32 is used to detect the gas analysis component signal and the gas analysis concentration signal of the gas analysis and send them to the processor 4.

[0055] The gas analysis collection box 31 is used to ensure that the gas analysis passes through and is discharged. The cavity 311 is arranged inside the gas analysis collection box 31, which is used to cover the overflow valve 2, that is, the overflow valve 2 is located inside the cavity 311. The gas sensor 32 is arranged inside the gas analysis collection box 31 and located on the path of the gas analysis flow, that is, the gas sensor 32 is located between the air inlet hole 33 and the air outlet hole 34, so as to ensure that the gas sensor 32 can detect the gas analysis component signal and the gas analysis concentration signal of the gas analysis after the gas analysis enters the gas analysis collection box 31 from the air inlet hole 33, and send the detected gas analysis component signal and gas analysis concentration signal to the processor 4. The air inlet hole 33 is used to make the gas analysis discharged by the overflow valve 2 enter the gas analysis collection box 31, and the air outlet hole 34 is used to discharge the gas analysis from the gas analysis collection box 31. In this embodiment, in order to ensure that the gas analysis can be quickly discharged, the number of the air inlet hole 33 and the air outlet hole 34 can be set to 4, and 4 air inlet holes 33 are uniformly and symmetrically distributed on the four walls of the gas analysis collection box 31, and 4 air outlet holes 34 are uniformly and symmetrically distributed on the upper surface of the gas analysis collection box 31, referring to Figure 5 As shown in the figure.

[0056] Specifically, after covering the cavity 311 on the overflow valve 2, when the valve-regulated lead-acid battery body 11 generates gas analysis, the gas analysis will enter the air inlet hole 33 of the gas analysis detection module 3 through the overflow valve 2 and be discharged through the air outlet hole 34. At this time, the gas sensor 32 located on the path of the gas analysis flow will detect the gas analysis component signal and the gas analysis concentration signal of the gas analysis flowing through, and send the detected gas analysis component signal and gas analysis concentration signal to the processor 4.

[0057] In another specific embodiment, optionally, Figure 8 A schematic diagram of the structure of the connection relationship of the valve-regulated lead-acid battery gas analysis abnormality detection system provided by an embodiment of the present application, referring toFigure 4 and Figure 8 As shown in FIG. 3, the gas evolution detection module 3 further comprises a signal conversion unit 35 and a signal processing unit 36; the signal conversion unit 35 is electrically connected with the gas sensor 32, the signal conversion unit 35 and the signal processing unit 36 are electrically connected, and each signal processing unit 36 is electrically connected with the processor 4; the signal conversion unit 35 is used for converting the gas evolution component signal and the gas evolution concentration signal into digital signals and sending the digital signals to the signal processing unit 36; and the signal processing unit 36 is used for receiving the digital signals and determining the gas evolution density of the valve-regulated lead-acid battery body 11 according to the digital signals.

[0058] In the embodiment, the signal conversion unit 35 is used for converting the analog signals of the gas evolution component signal and the gas evolution concentration signal into digital signals for the signal processing unit 36 to calculate. The signal processing unit 36 is used for processing and calculating the obtained signals to obtain a preset calculation result. In the embodiment, the signal processing unit 36 is used for processing and calculating the digital signals representing the gas evolution component signal and the gas evolution concentration signal according to the digital signals converted by the signal conversion unit 35, and finally obtaining the gas evolution density of each valve-regulated lead-acid battery body 11. The process of processing the digital signals by the signal processing unit 36 can be determined according to the actual situation, and is not limited herein.

[0059] In another specific embodiment, optionally, continuing to refer to Figure 8 The gas evolution detection module 3 further comprises a filter-amplification unit 39; the filter-amplification unit 39 is electrically connected between the signal conversion unit 35 and the gas sensor 32, and is used for filtering and amplifying the gas evolution component signal and the gas evolution concentration signal, so that the amplified gas evolution component signal and the gas evolution concentration signal are sent to the signal conversion unit 35.

[0060] The filter-amplification unit 39 comprises a filter subunit and an amplification subunit. After receiving the gas evolution component signal and the gas evolution concentration signal, the filter subunit in the filter-amplification unit 39 filters the gas evolution component signal and the gas evolution concentration signal, and then the amplification subunit amplifies the filtered gas evolution component signal and the gas evolution concentration signal, so that the amplified signals are sent to the signal conversion unit 35.

[0061] Optionally, continuing to refer to Figure 4 and Figure 5 The number of the exhaust holes 34 is greater than or equal to 2; the gas evolution detection module 3 further comprises a sensor sealing cover 37; the sensor sealing cover 37 is located on the side of the gas evolution collection box 31 away from the cavity 311, each exhaust hole 34 is uniformly distributed between the peripheral region of the gas evolution collection box 31 and the sensor sealing cover 37; and the sensor sealing cover 37 is detachably connected with the gas evolution collection box 31.

[0062] The sensor sealing cover 37 is used to prevent the gas sensor 32, the signal conversion module 35, the signal processing module 36 and the filter amplification unit 39 from being contaminated and to protect them. In addition, the sensor sealing cover 37 and the gas collection box 31 are detachably connected, and the connection mode can include but is not limited to a hinge connection mode, which is used to facilitate replacement of the gas sensor 32, the signal conversion module 35, the signal processing module 36 and the filter amplification unit 39. In addition, in order to ensure that the exhaust holes 34 do not occupy the positions, the exhaust holes 34 can be evenly distributed between the peripheral area of the gas collection box 31 and the sensor sealing cover 37, as shown in Figure 5

[0063] Optionally, continuing to refer to Figure 4 , the gas detection module 3 further includes a collection box sealing ring 38. The collection box sealing ring 38 is located between the gas collection box 31 and the valve-regulated lead-acid battery body 11, and is used to ensure that the gas collection box 31 is tightly attached to the valve-regulated lead-acid battery body 11 to completely cover the overflow valve 2.

[0064] The collection box sealing ring 38 is arranged between the valve-regulated lead-acid battery body 11 and the gas collection box 31, and is used to completely seal the overflow valve 2, so that all the gas overflowing through the overflow valve 2 is discharged to the gas detection module 3 and is not discharged from other parts, thereby ensuring the accuracy of detection.

[0065] Optionally, Figure 9 A second valve-regulated lead-acid battery gas anomaly detection system provided by the embodiment is shown in FIG. 5. As shown in Figure 9 , the system further includes a display module 5. The display module 5 is electrically connected to the processor 4. The processor 4 is further configured to control the display module 5 to display the gas density of each valve-regulated lead-acid battery body 11 after receiving the gas density of each valve-regulated lead-acid battery body 11.

[0066] Optionally, continuing to refer to Figure 9 , the system further includes an alarm module 6. The alarm module 6 is electrically connected to the processor 4. The processor 4 is further configured to control the alarm module 6 to alarm after determining the valve-regulated lead-acid battery body 11 with the gas anomaly.

[0067] ​The display module 6 is used to display the gas evolution density of each valve-regulated lead-acid battery body 11 after the processor 4 receives the gas evolution density of each valve-regulated lead-acid battery body 11, so that the staff can check the gas evolution of each valve-regulated lead-acid battery body 11 in time. The display module 6 can include but is not limited to a display screen or a projector and other devices that can be used for display. The alarm module 6 is used to alarm after the processor 4 determines the valve-regulated lead-acid battery body 11 with abnormal gas evolution, so as to timely inform the staff that the valve-regulated lead-acid battery body 11 has abnormal gas evolution, facilitate the staff to timely maintenance, and the position of the valve-regulated lead-acid battery body 11 with abnormal gas evolution can be determined according to the content displayed by the display module 6. The alarm sound of the alarm module 6 can include but is not limited to "ticking", "tapping" and other sounds that can be clearly heard by the staff.

[0068] Based on the same inventive concept, Figure 10 A flow chart of a valve-regulated lead-acid battery gas evolution abnormality detection method is provided for the embodiment of the present application. The detection method is executed based on the valve-regulated lead-acid battery gas evolution abnormality detection system described above. Referring to Figure 10 The method includes the following steps:

[0069] S110, receiving the gas evolution density of each valve-regulated lead-acid battery body sent by each gas evolution detection module.

[0070] S120, determining the valve-regulated lead-acid battery body with abnormal gas evolution according to the gas evolution density of each valve-regulated lead-acid battery body.

[0071] Specifically, after receiving the gas evolution density of each valve-regulated lead-acid battery body sent by each gas evolution detection module, the gas evolution density of each valve-regulated lead-acid battery body is calculated and processed according to the gas evolution density of each valve-regulated lead-acid battery body, and finally the valve-regulated lead-acid battery body with abnormal gas evolution can be determined.

[0072] The technical scheme of the embodiment of the present application receives the gas evolution density of each valve-regulated lead-acid battery body sent by each gas evolution detection module, and determines the valve-regulated lead-acid battery body with abnormal gas evolution according to the gas evolution density of each valve-regulated lead-acid battery body. By using the above method, the valve-regulated lead-acid battery with abnormal gas evolution is quickly determined, which avoids the valve-regulated lead-acid battery failure caused by the degradation of the valve-regulated lead-acid battery pack, ensures the safe and stable operation of the valve-regulated lead-acid battery pack, and improves the quality and service life of the valve-regulated lead-acid battery pack.

[0073] In another specific embodiment, Figure 11 A flow chart of a second valve-regulated lead-acid battery gas evolution abnormality detection method is provided for the embodiment of the present application. Referring to Figure 11As shown, the detection method comprises:

[0074] S210, receiving the gas evolution density of each valve-regulated lead-acid battery body sent by each gas evolution detection module.

[0075] S220, determining the average gas evolution density, the maximum gas evolution density and the minimum gas evolution density of each valve-regulated lead-acid battery body according to the gas evolution density of each valve-regulated lead-acid battery body.

[0076] Specifically, after determining the gas evolution density of each valve-regulated lead-acid battery body, the gas evolution density of each valve-regulated lead-acid battery body is accumulated and divided by the number of valve-regulated lead-acid battery bodies, so that the average gas evolution density of each valve-regulated lead-acid battery body can be calculated, that is, The average gas evolution density is ρ k The gas evolution density of each valve-regulated lead-acid battery body is ρ, and n is the number of valve-regulated lead-acid battery bodies. In addition, the maximum gas evolution density and the minimum gas evolution density among the gas evolution densities of each valve-regulated lead-acid battery body need to be determined, that is, Max(ρ1, ρ2, …, ρ k ) and Min(ρ1, ρ2, …, ρ k ), wherein ρ1, ρ2, …, ρ k are the corresponding gas evolution densities of each valve-regulated lead-acid battery body.

[0077] S230, determining the first difference value between the maximum gas evolution density and the average gas evolution density, and the second difference value between the average gas evolution density and the minimum gas evolution density according to the average gas evolution density, the maximum gas evolution density and the minimum gas evolution density.

[0078] Specifically, after determining the average gas evolution density, the maximum gas evolution density and the minimum gas evolution density of each valve-regulated lead-acid battery body, the valve-regulated lead-acid battery body with gas evolution anomaly needs to be determined. In this embodiment, according to the average gas evolution density and the maximum gas evolution density, the first difference value between the maximum gas evolution density and the average gas evolution density can be obtained by difference calculation. According to the average gas evolution density and the minimum gas evolution density, the second difference value between the average gas evolution density and the minimum gas evolution density can be obtained by difference calculation.

[0079] S240, determining that the valve-regulated lead-acid battery body corresponding to the maximum gas evolution density has gas evolution anomaly when the first difference value is greater than the preset gas evolution density limit.

[0080] Specifically, when the first difference is greater than the preset outgassing gas density limit, it indicates that the difference between the average outgassing gas density and the outgassing gas density of the valve-regulated lead-acid battery body with the largest outgassing amount exceeds the set limit value, and the outgassing amount of the valve-regulated lead-acid battery body corresponding to the largest outgassing gas density is too high, so it can be determined that the valve-regulated lead-acid battery body corresponding to the largest outgassing gas density has outgassing abnormality. The preset outgassing gas density limit can be determined according to actual conditions, which is not limited here. For example, the preset outgassing gas density limit is 0.1 g / L.

[0081] S250, when the second difference is greater than the preset outgassing gas density limit, determining that the valve-regulated lead-acid battery body corresponding to the minimum outgassing gas density has outgassing abnormality.

[0082] Specifically, when the second difference is greater than the preset outgassing gas density limit, it indicates that the difference between the average outgassing gas density and the outgassing gas density of the valve-regulated lead-acid battery body with the smallest outgassing amount exceeds the set limit value, and the outgassing amount of the valve-regulated lead-acid battery body corresponding to the minimum outgassing gas density is too low, so it can be determined that the valve-regulated lead-acid battery body corresponding to the minimum outgassing gas density has outgassing abnormality. For example, the preset outgassing gas density limit is 0.1 g / L.

[0083] The technical scheme of the embodiment of the present application quickly determines the valve-regulated lead-acid battery with outgassing abnormality, avoids valve-regulated lead-acid battery pack degradation leading to valve-regulated lead-acid battery failure, ensures safe and stable operation of the valve-regulated lead-acid battery pack, and improves the quality and service life of the valve-regulated lead-acid battery pack.

[0084] It should be understood that the various forms of flow shown above can be reordered, added to, or deleted from. For example, the steps described in the present application can be executed in parallel, in sequence, or in different orders, as long as the desired results of the technical scheme of the present application can be achieved, which is not limited herein.

[0085] The above specific embodiments do not constitute a limitation on the protection scope of the present application. Those skilled in the art should understand that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A gas evolution abnormality detection system for a valve regulated lead acid battery, characterized by, The application relates to a valve-regulated lead-acid battery pack, a plurality of gas overflow valves, a plurality of gas detection modules and a processor, wherein the valve-regulated lead-acid battery pack comprises a plurality of valve-regulated lead-acid battery bodies connected in series; the number of the valve-regulated lead-acid battery bodies is the same as the number of the gas overflow valves and the number of the gas detection modules. The gas overflow valves are arranged on the valve-regulated lead-acid battery bodies; the gas detection modules are arranged on the gas overflow valves, and the processor is electrically connected with the gas detection modules. The gas overflow valves are used for discharging the gas generated by the valve-regulated lead-acid battery bodies to the gas detection modules; the gas detection modules are used for detecting the gas component signal and the gas concentration signal of the gas and performing signal processing on the gas component signal and the gas concentration signal to determine the gas density of the valve-regulated lead-acid battery bodies; and the processor is used for receiving the gas density of each valve-regulated lead-acid battery body sent by each gas detection module and determining the valve-regulated lead-acid battery body with the gas abnormality according to the gas density of each valve-regulated lead-acid battery body. The gas detection module comprises a gas collection box, a gas sensor, an air inlet hole and an air outlet hole; the gas collection box contains a cavity; the cavity is used for covering the gas overflow valve; the air inlet hole is arranged on one side of the gas collection box close to the cavity; the air outlet hole is arranged on the side of the gas collection box away from the cavity; and the gas sensor is arranged in the gas collection box and located on the gas flow path. The air inlet hole is used for allowing the gas discharged by the gas overflow valve to enter the gas collection box, and the air outlet hole is used for discharging the gas from the gas collection box; and the gas sensor is used for detecting the gas component signal and the gas concentration signal of the gas and sending the gas component signal and the gas concentration signal to the processor.

2. The detection system of claim 1, wherein, The gas detection module further comprises a signal conversion unit and a signal processing unit; the signal conversion unit is electrically connected with the gas sensor; the signal conversion unit and the signal processing unit are electrically connected; and each signal processing unit is electrically connected with the processor. The signal conversion unit is used for converting the gas component signal and the gas concentration signal into digital signals and sending the digital signals to the signal processing unit; and the signal processing unit is used for receiving the digital signals and determining the gas density of the valve-regulated lead-acid battery body according to the digital signals.

3. The detection system of claim 2, wherein, The gas detection module further comprises a filter amplification unit. The filter amplification unit is electrically connected between the signal conversion unit and the gas sensor and is used for filtering and amplifying the gas component signal and the gas concentration signal so that the amplified gas component signal and the amplified gas concentration signal are sent to the signal conversion unit.

4. The detection system of claim 1, wherein, The number of the air outlet holes is greater than or equal to 2; and the gas detection module further comprises a sensor sealing cover. The sensor sealing cover is located on the side of the gas evolution collection box away from the cavity, and each exhaust hole is uniformly distributed between the peripheral area of the gas evolution collection box and the sensor sealing cover. The sensor sealing cover is detachably connected with the gas evolution collection box.

5. The detection system of claim 1, wherein, The gas evolution detection module further comprises a collection box sealing ring. The collection box sealing ring is located between the gas evolution collection box and the valve-regulated lead-acid battery body, and is used to ensure that the gas evolution collection box is tightly attached to the valve-regulated lead-acid battery body to completely cover the overflow valve.

6. The detection system of claim 1, wherein, Further comprising a display module; The display module is electrically connected with the processor; and the processor is further used to control the display module to display the evolved gas density of each valve-regulated lead-acid battery body after receiving the evolved gas density of each valve-regulated lead-acid battery body.

7. The detection system of claim 1, wherein, Further comprising an alarm module; The alarm module is electrically connected with the processor; and the processor is further used to control the alarm module to alarm after determining the valve-regulated lead-acid battery body with evolved gas abnormality.

8. A method of detecting abnormal gas evolution in a valve regulated lead acid battery, characterized by, The valve-regulated lead-acid battery evolved gas abnormality detection system based on any one of claims 1-7 comprises: receiving the evolved gas density of each valve-regulated lead-acid battery body sent by each gas evolution detection module; determining the valve-regulated lead-acid battery body with evolved gas abnormality according to the evolved gas density of each valve-regulated lead-acid battery body.

9. The detection method according to claim 8, characterized in that, Determining the valve-regulated lead-acid battery body with evolved gas abnormality according to the evolved gas density of each valve-regulated lead-acid battery body comprises: determining the average evolved gas density, the maximum evolved gas density and the minimum evolved gas density of each valve-regulated lead-acid battery body according to the evolved gas density of each valve-regulated lead-acid battery body; determining the first difference between the maximum evolved gas density and the average evolved gas density, and the second difference between the average evolved gas density and the minimum evolved gas density according to the average evolved gas density, the maximum evolved gas density and the minimum evolved gas density; determining the evolved gas abnormality of the valve-regulated lead-acid battery body corresponding to the maximum evolved gas density when the first difference is greater than a preset evolved gas density limit; determining the evolved gas abnormality of the valve-regulated lead-acid battery body corresponding to the minimum evolved gas density when the second difference is greater than a preset evolved gas density limit.

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