A system and method for monitoring the health of an electrical storage device

Abstract

The embodiment of the application discloses a kind of health state monitoring system and method of power storage equipment, the system includes: data acquisition module, electromagnetic interference isolation module and equipment state analysis module;Electromagnetic interference isolation module is used to isolate power storage equipment and data acquisition module in electromagnetic interference isolation module when data acquisition module works, to avoid the accuracy of voltage value and current value that data acquisition module collects is influenced by electromagnetic interference equipment in ring main unit;Equipment state analysis module is used to determine the current voltage value and current current value that data acquisition module obtains at current time point according to current time point, determines that power storage equipment is normal at current time point, obtains the current operating cycle that current time point is located, and according to current operating cycle under current voltage average and current current average, determine the health state of power storage equipment in current operating cycle, reduce health state monitoring cost, improve health state determination efficiency and accuracy.

Description

Technical Field

[0001] This invention relates to the field of power system technology, and in particular to a health status monitoring system and method for energy storage devices. Background Technology

[0002] In the power industry, ring main units (RMS) are crucial power equipment, playing a vital role in protection, distribution, and monitoring. The protection devices and distribution terminals within the RMS, as its core components, are powered by two separate sets of energy storage devices. However, due to the physical characteristics of these energy storage devices, their performance may degrade or they may become damaged over time or due to environmental degradation. This can lead to malfunctions in the protection devices and distribution terminals, and in severe cases, even cause widespread power outages, battery fires, or explosions.

[0003] In existing technologies, the health status of energy storage devices in distribution network ring network cabinets is usually obtained through regular manual inspections, or only when protection devices or distribution terminals fail.

[0004] However, due to the large number of ring main units in operation and their dispersed installation locations, it is difficult to conduct timely and accurate inspections of the health status of each energy storage device within the ring main unit using existing technologies, thus affecting the monitoring efficiency of the energy storage devices. Secondly, manual inspection of energy storage devices leads to excessively high inspection costs and poses potential personal safety hazards when there are numerous devices installed in dispersed locations. Summary of the Invention

[0005] This invention provides a health status monitoring system and method for energy storage devices, which can reduce the cost of monitoring the health status of energy storage devices and improve the efficiency and accuracy of determining the health status of energy storage devices.

[0006] In a first aspect, embodiments of the present invention provide a health status monitoring system for energy storage devices, the system comprising: a data acquisition module, an electromagnetic interference isolation module, and a device status analysis module;

[0007] Among them, the equipment status analysis module is connected to the data acquisition module, the data acquisition module is connected to the energy storage device, the data acquisition module and the energy storage device are set inside the electromagnetic interference isolation module, and both the electromagnetic interference isolation module and the equipment status analysis module are set inside the ring network cabinet;

[0008] The data acquisition module is used to acquire the voltage and current values ​​of the energy storage device at different time points and send the voltage and current values ​​to the device status analysis module.

[0009] The electromagnetic interference isolation module is used for isolating the power storage device and the data acquisition module in the electromagnetic interference isolation module when the data acquisition module works, so as to avoid the influence of the electromagnetic interference device in the ring main unit on the accuracy of the voltage value and the current value collected by the data acquisition module.

[0010] The device state analysis module is configured to determine that the power storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point, obtain a current operation period in which the current time point is located, and determine a health state of the power storage device in the current operation period according to a current voltage average value and a current current average value in the current operation period.

[0011] Optionally, the device state analysis module is specifically configured to: after receiving the current voltage value and the current current value collected by the data acquisition module at the current time point and determining that the current operation period in which the current time point is located is not an initial operation period of the power storage device, obtain a previous operation period in which voltage values and current values closest to the current operation period are located; each operation period includes a set number of time points; obtain a target time point corresponding to the current time point in the previous operation period, and obtain a target voltage value and a target current value collected by the data acquisition module at the target time point; if a difference between the target voltage value and the current voltage value is less than a first preset voltage difference value, and a difference between the target current value and the current current value is less than a first preset current difference value, it is determined that the power storage device is normal at the current time point; if the difference between the target voltage value and the current voltage value is greater than or equal to the first preset voltage difference value, or the difference between the target current value and the current current value is greater than or equal to the first preset current difference value, it is determined that the power storage device is abnormal at the current time point.

[0012] Optionally, the device state analysis module is further configured to: when it is determined that the power storage device is normal at the current time point, acquire a current voltage average value and a current current average value at the current operation period, and a previous voltage average value and a previous current average value at a previous operation period; if a difference between the current voltage average value and the previous voltage average value is less than a second preset voltage difference value, and a difference between the current current average value and the previous current average value is less than a second preset current difference value, determine whether each time point at the current operation period is greater than any time point at a preset operation period; if yes, acquire an initial voltage average value and an initial current average value corresponding to an initial operation period; if a difference between the current voltage average value and the initial voltage average value is less than a third preset voltage difference value, and a difference between the current current average value and the initial current average value is less than a third preset current difference value, determine that the power storage device is normal at the current operation period; if a difference between the current voltage average value and the initial voltage average value is greater than or equal to the third preset voltage difference value, and a difference between the current current average value and the initial current average value is greater than or equal to the third preset current difference value, determine that the power storage device is abnormal at the current operation period; if no, directly output that the power storage device is normal at the current operation period.

[0013] Optionally, the device state analysis module is further configured to: if a difference between the current voltage average value and the previous voltage average value is greater than or equal to the second preset voltage difference value, or a difference between the current current average value and the previous current average value is greater than or equal to the second preset current difference value, determine that the power storage device is abnormal at the current operation period.

[0014] Optionally, the electromagnetic interference isolation module comprises: an isolation cover, a first gear, a driving frame and a second gear; wherein the isolation cover is arranged above the power storage device and the data acquisition module, the first gear, the driving frame and the second gear are arranged at the top end of the isolation cover, and the driving frame is arranged between the first gear and the second gear; the side surfaces of the isolation cover are all open, at least one rotating shaft is arranged in each opening, each rotating shaft is fixedly connected with a sealing plate, and each rotating shaft is fixedly connected with the first gear arranged at the top end of the isolation cover; the second gear is configured to drive the first gear connected with the driving frame to rotate through the driving frame, and drive the rotating shaft connected with the first gear to rotate through the first gear.

[0015] Optionally, the driving frame comprises a first rack, a second rack and at least two connecting rods; wherein the two connecting rods are fixedly arranged between the first rack and the second rack, the first rack is meshingly connected with the first gear, and the second rack is meshingly connected with the second gear; the second rack is configured to drive the first rack to drive the first gear to rotate through the connecting rods.

[0016] Optionally, the electromagnetic interference isolation module further comprises a third rack gear; wherein a driving frame is arranged between the second gear and the first gear located on the first side of the isolation cover, and between the second gear and the first gear located on the third side of the isolation cover; a third rack gear is arranged between the second gear and the first gear located on the second side of the isolation cover, and between the second gear and the first gear located on the fourth side of the isolation cover; the first side and the third side are opposite sides, and the second side and the fourth side are opposite sides; one side of the third rack gear is engagedly connected with the second gear, and the other side of the third rack gear is engagedly connected with the first gear.

[0017] In a second aspect, the embodiments of the present application further provide a health state monitoring method of a power storage device, which is applied to the health state monitoring system of any embodiment of the present application, and the method comprises:

[0018] The voltage value and the current value of the power storage device at different time points are acquired by the data acquisition module, and the voltage value and the current value are sent to the device state analysis module;

[0019] The power storage device and the data acquisition module are isolated in the electromagnetic interference isolation module when the data acquisition module is working, so as to avoid the influence of the electromagnetic interference equipment in the ring network cabinet on the accuracy of the voltage value and the current value collected by the data acquisition module.

[0020] After the device state analysis module determines that the power storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point, the current running cycle in which the current time point is located is acquired, and the health state of the power storage device in the current running cycle is determined according to the current voltage average value and the current current average value in the current running cycle.

[0021] Optionally, the determination that the power storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point comprises: after the current voltage value and the current current value collected by the data acquisition module at the current time point are received, and it is determined that the current running cycle in which the current time point is located is not an initial running cycle of the power storage device, the last running cycle in which the voltage value and the current value closest to the current running cycle are located is acquired; wherein each running cycle comprises a set number of time points; the target time point corresponding to the current time point in the last running cycle is acquired, and the target voltage value and the target current value collected by the data acquisition module at the target time point are acquired; if the difference between the target voltage value and the current voltage value is less than a first preset voltage difference value, and the difference between the target current value and the current current value is less than a first preset current difference value, it is determined that the power storage device is normal at the current time point.

[0022] Optionally, the health state of the power storage device in the current operation cycle is determined according to the current voltage average value and the current current average value in the current operation cycle, including: when it is determined that the power storage device is normal at the current time point, the current voltage average value and the current current average value in the current operation cycle, and the previous voltage average value and the previous current average value in the previous operation cycle are obtained; if the difference between the current voltage average value and the previous voltage average value is less than a second preset voltage difference value, and the difference between the current current average value and the previous current average value is less than a second preset current difference value, whether each time point in the current operation cycle is greater than any time point in the preset operation cycle is determined; if yes, the initial voltage average value and the initial current average value corresponding to the initial operation cycle are obtained, if the difference between the current voltage average value and the initial voltage average value is less than a third preset voltage difference value, and the difference between the current current average value and the initial current average value is less than a third preset current difference value, it is determined that the power storage device is normal in the current operation cycle; if the difference between the current voltage average value and the initial voltage average value is greater than or equal to the third preset voltage difference value, and the difference between the current current average value and the initial current average value is greater than or equal to the third preset current difference value, it is determined that the power storage device is abnormal in the current operation cycle; if no, the power storage device is directly output as normal in the current operation cycle.

[0023] The technical scheme of the embodiment of the application monitors the health state of the energy storage battery through the data acquisition module and the device state analysis module, solves the problem that the health state of the power storage device is monitored by manpower, resulting in low monitoring efficiency and high cost of the power storage device, reduces the cost of monitoring the health state of the power storage device, and improves the efficiency of monitoring the health state of the power storage device. Secondly, the electromagnetic interference isolation module is arranged on the external cover of the data acquisition module and the power storage device, which can avoid the influence of the electromagnetic interference equipment in the ring network cabinet on the accuracy of the voltage value and the current value collected by the data acquisition module, thereby improving the accuracy of determining the health state of the power storage device.

[0024] 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 application, nor is it used to limit the scope of the application. Other features of the application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0026] Figure 1is a structural schematic diagram of a health state monitoring system of a power storage device according to an embodiment of the present application;

[0027] Figure 2 is a schematic diagram for reflecting the position of an electromagnetic interference isolation module in a ring main unit according to an embodiment of the present application;

[0028] Figure 3 is a structural schematic diagram of an electromagnetic interference isolation module according to an embodiment of the present application;

[0029] Figure 4 is a flow chart of a health state monitoring method of a power storage device according to an embodiment three of the present application. DETAILED DESCRIPTION

[0030] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with 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 the person skilled in the art without creative labor should belong to the scope of protection of the present application.

[0031] 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 have to describe a specific order or 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 those 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 including 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.

[0032] Embodiment one

[0033] Figure 1 is a structural schematic diagram of a health state monitoring system of a power storage device according to an embodiment one of the present application, and the present embodiment can be applied to the case of monitoring the health state of the power storage device arranged in the ring main unit.

[0034] As shown in Figure 1 , the health state monitoring system of the power storage device disclosed in the present embodiment comprises a data acquisition module 11, an electromagnetic interference isolation module 12 and a device state analysis module 13.

[0035] The device state analysis module 13 is connected with the data acquisition module 11, and the data acquisition module 11 is connected with the power storage device. The data acquisition module 11 and the power storage device are arranged in the internal part of the electromagnetic interference isolation module 12, and the electromagnetic interference isolation module 12 and the device state analysis module 13 are arranged in the internal part of the ring main unit. Specifically, the electromagnetic interference isolation module 12 can be arranged at the position as shown in FIG. 8 in the ring main unit. Figure 2

[0036] In the embodiment, the type of the power storage device can be various, for example, a battery. The data acquisition module 11 can be used to acquire the voltage value and the current value of the power storage device at different time points, and send the voltage value and the current value to the device state analysis module 13.

[0037] Specifically, the preset overall test period can be divided into multiple operation periods containing the same number of time points. Then, the voltage value and the current value of the power storage device at a certain time point can be acquired by the data acquisition module 11, and the voltage value and the current value at the certain time point can be taken as the voltage value and the current value of the corresponding time point. The time point can be set according to the user demand, for example, a day.

[0038] For example, assuming that the overall test period is half a year, each operation period can be set to one month, and the time points in the operation period can be set to days. At this time, the voltage value and the current value of the power storage device can be acquired by the data acquisition module 11 at a certain time point every day, and the voltage value and the current value at the certain time point can be taken as the voltage value and the current value of the corresponding time point (day).

[0039] The electromagnetic interference isolation module 12 can be used to isolate the power storage device and the data acquisition module 11 in the electromagnetic interference isolation module 12 when the data acquisition module 11 works, so as to avoid the electromagnetic interference device in the ring main unit affecting the accuracy of the voltage value and the current value acquired by the data acquisition module 11.

[0040] Specifically, when the data acquisition module 11 acquires the voltage value and the current value of the power storage device, the electromagnetic interference generated by the electromagnetic interference device arranged outside the electromagnetic interference isolation module 12 can be isolated by the electromagnetic interference isolation module 12. The electromagnetic interference device can be a device arranged in the ring main unit and capable of generating electromagnetic interference to the voltage value and the current value of the power storage device. The electromagnetic interference device can be various, for example, a switching power supply, a motor, a frequency converter, a sensor, etc.

[0041] ​The device state analysis module 13 can be configured to determine that the energy storage device is normal at the current time point according to the current voltage value and the current current value collected by the data collection module 11 at the current time point, obtain a current operation cycle in which the current time point is located, and determine the health state of the energy storage device in the current operation cycle according to the current voltage average value and the current current average value in the current operation cycle.

[0042] Specifically, the device state analysis module 13 can determine whether the energy storage device is normal at the current time point according to the current voltage value, the upper limit voltage value, the current current value, and the upper limit current value. Alternatively, the device state analysis module 13 can obtain a target time point corresponding to the current time point and a target voltage value and a target current value of the energy storage device at the target time point, and determine whether the energy storage device is normal at the current time point according to the difference between the target voltage value and the current voltage value and the difference between the target current value and the current current value.

[0043] If it is determined that the energy storage device is normal at the current time point, a current operation cycle in which the current time point is located and a historical operation cycle corresponding to the current operation cycle are obtained. Then, a historical voltage average value and a historical current average value in the historical operation cycle can be obtained, and the health state of the energy storage device in the current operation cycle can be determined according to the difference between the historical voltage average value and the current voltage average value and the difference between the historical current average value and the current current average value. The health state can include normal and abnormal of the energy storage device.

[0044] The advantages of such a setting are as follows. First, compared with the way of manually inspecting the storage battery, monitoring the health state of the energy storage battery by the data collection module and the device state analysis module can reduce the cost of monitoring the health state of the energy storage device and improve the efficiency of monitoring the health state of the energy storage device. Second, by further determining the health state of the energy storage device in the current operation cycle after determining that the energy storage device is normal at the current time point, the health state of the energy storage device can be accurately determined, and a basis for analyzing the abnormal reason of the energy storage device can be provided. For example, if the current voltage value of the energy storage device is higher than the current voltage average value and higher than a preset voltage threshold, it can be determined that the abnormal reason of the energy storage device is overcharging. Finally, by arranging the electromagnetic interference isolation module outside the data collection module and the energy storage device, the accuracy of the voltage value and the current value collected by the data collection module can be improved, and the accuracy of determining the health state of the energy storage device can be improved.

[0045] The technical scheme of the embodiment provides a health state monitoring system of a power storage device, which comprises a data acquisition module, an electromagnetic interference isolation module and a device state analysis module; wherein the data acquisition module is used to acquire voltage values and current values of the power storage device at different time points and send the voltage values and the current values to the device state analysis module; the electromagnetic interference isolation module is used to isolate the power storage device and the data acquisition module in the electromagnetic interference isolation module when the data acquisition module works, so as to avoid that the electromagnetic interference equipment in the ring network cabinet affects the accuracy of the voltage values and the current values collected by the data acquisition module; and the device state analysis module is used to determine that the power storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point, acquire a current operation period in which the current time point is located, and determine the health state of the power storage device in the current operation period according to a current voltage average value and a current current average value in the current operation period, thereby solving the problem that the health state of the power storage device is monitored by manual work, resulting in low monitoring efficiency and high cost of the power storage device, reducing the cost of monitoring the health state of the power storage device, and improving the efficiency and accuracy of determining the health state of the power storage device.

[0046] Embodiment two

[0047] The embodiment is further optimization and expansion based on the above-mentioned embodiments, and can be combined with each optional technical scheme in the above-mentioned embodiments.

[0048] As shown in Figure 1 A health state monitoring system of a power storage device is disclosed in the embodiment, which comprises a data acquisition module 11, an electromagnetic interference isolation module 12 and a device state analysis module 13.

[0049] In the embodiment, the device state analysis module 13 is specifically configured to: after receiving the current voltage value and the current current value collected by the data acquisition module 11 at the current time point and determining that the current operation period in which the current time point is located is not an initial operation period of the power storage device, acquire a previous operation period in which voltage values and current values closest to the current operation period are located; wherein each operation period comprises a set number of time points; acquire a target time point corresponding to the current time point in the previous operation period, and acquire a target voltage value and a target current value collected by the data acquisition module at the target time point; if the difference between the target voltage value and the current voltage value is less than a first preset voltage difference value, and the difference between the target current value and the current current value is less than a first preset current difference value, it is determined that the power storage device is normal at the current time point; if the difference between the target voltage value and the current voltage value is greater than or equal to the first preset voltage difference value, or the difference between the target current value and the current current value is greater than or equal to the first preset current difference value, it is determined that the power storage device is abnormal at the current time point.

[0050] In one specific embodiment, after receiving the current voltage value and the current current value collected by the data collection module 11 at the current time point, it can be determined whether the current operation cycle in which the current time point is located is the initial operation cycle of the power storage device. If the current operation cycle in which the current time point is located is not the initial operation cycle of the power storage device, the last operation cycle in which the voltage value and the current value closest to the collection time point and the current operation cycle are obtained, and the target time point corresponding to the current time point in the last operation cycle is obtained according to the position of the current time point in the current operation cycle. The number of time points between the current time point and the target time point is set to be one less. If the current operation cycle in which the current time point is located is the initial operation cycle of the power storage device, the current voltage value and the current current value at the current time point are directly taken as the reference data, so as to determine the health state of the power storage device in other operation cycles.

[0051] The advantage of such setting is that, in actual application, the electromagnetic interference devices in the ring main unit are not operated at the same time, and it may occur that multiple electromagnetic interference devices generate electromagnetic interference at the previous collection time point, but no electromagnetic interference device generates electromagnetic interference at the next collection time point, so that the data collected at adjacent time points have a large deviation. Therefore, the technical scheme of the present embodiment can accurately determine the health state of the power storage device at the current time point when the electromagnetic interference isolation module fails by comparing the current voltage value and the current current value in the current operation cycle with the target voltage value and the target current value in the last operation cycle, and further ensures the accuracy of the health state of the power storage device at the current time point.

[0052] Optionally, the device state analysis module 13 is further configured to: when it is determined that the power storage device is normal at the current time point, acquire a current voltage average value and a current current average value in the current operation period, and a previous voltage average value and a previous current average value in a previous operation period; if a difference between the current voltage average value and the previous voltage average value is less than a second preset voltage difference value, and a difference between the current current average value and the previous current average value is less than a second preset current difference value, determine whether each time point in the current operation period is greater than any time point in a preset operation period; if yes, acquire an initial voltage average value and an initial current average value corresponding to an initial operation period; if a difference between the current voltage average value and the initial voltage average value is less than a third preset voltage difference value, and a difference between the current current average value and the initial current average value is less than a third preset current difference value, determine that the power storage device is normal in the current operation period; if a difference between the current voltage average value and the initial voltage average value is greater than or equal to the third preset voltage difference value, and a difference between the current current average value and the initial current average value is greater than or equal to the third preset current difference value, determine that the power storage device is abnormal in the current operation period; if no, directly output that the power storage device is normal in the current operation period.

[0053] For example, assuming that the preset operation period is a third operation period, the current operation period is a fourth operation period, and each time point in the fourth operation period is greater than any time point in the third operation period, the device state analysis module 13 can determine whether the power storage device is normal in the current operation period again according to a difference between the current voltage average value and the initial voltage average value, and a difference between the current current average value and the initial current average value after determining that the power storage device is normal in the current operation period according to a difference between the current voltage average value and the previous voltage average value, and a difference between the current current average value and the previous current average value.

[0054] In this way, the device state analysis module 13 determines whether the power storage device is normal in the current operation period again according to a difference between the current voltage average value and the initial voltage average value, and a difference between the current current average value and the initial current average value after determining that the power storage device is normal in the current operation period according to a difference between the current voltage average value and the previous voltage average value, and a difference between the current current average value and the previous current average value, which avoids the situation that the health state of the power storage device is determined inaccurately due to the fact that the data collected in the current operation period and the previous operation period are both abnormal because the power storage device has been running for a long time.

[0055] Optionally, the device state analysis module 13 is further configured to: if the difference between the current voltage average value and the previous voltage average value is greater than or equal to the second preset voltage difference value, or the difference between the current current average value and the previous current average value is greater than or equal to the second preset current difference value, determine that the power storage device is abnormal in the current operation period.

[0056] Optionally, the device state analysis module 13 can include a power supply conversion module, a communication conversion module, a 4G communication module and a data communication card. The power supply conversion module can be used to supply power to the device state analysis module 13 using the power supply in the ring network cabinet. The communication conversion module can be used to convert the health status of the power storage device, and the voltage data and current data obtained by the data acquisition module 11 into network digital signals that can be sent through the 4G communication module. The data communication card can be inserted into the 4G communication module for communication between the 4G communication module and the user terminal.

[0057] The advantage of such an arrangement is that by providing a power supply conversion module, a communication conversion module, a 4G communication module and a data communication card in the device state analysis module, the health status of the power storage device can be timely feedback to the user and the user's operation instructions can be received, providing a basis for timely maintenance of the power storage device.

[0058] Optionally, as shown in Figure 3 The electromagnetic interference isolation module 12 includes an isolation cover 201, a first gear 202, a drive frame 203 and a second gear 204.

[0059] The isolation cover 201 is provided above the power storage device and the data acquisition module 11. The first gear 202, the drive frame 203 and the second gear 204 are all arranged at the top end of the isolation cover 201, and the drive frame 203 is arranged between the first gear 202 and the second gear 204. The side of the isolation cover 201 is provided with an opening 2011, and at least one shaft 2012 is arranged in each opening 2011. Each shaft 2012 is fixedly connected with a sealing plate 2013, and each shaft 2012 is fixedly connected with the first gear 202 arranged at the top end of the isolation cover 201.

[0060] In this embodiment, the second gear 204 is used to drive the first gear 202 connected with the drive frame 203 to rotate through the drive frame 203, and drive the shaft 2012 connected with the first gear 202 to rotate through the first gear 202, so as to drive the sealing plate 2013 connected with the shaft 2012 to rotate through the shaft 2012.

[0061] In a specific embodiment, after the second gear 204 is driven to rotate by the motor, the drive frame 203 can be driven by the second gear 204 to drive the first gear 202 connected with the drive frame 203 to rotate through the drive frame 203.

[0062] Optionally, as shown in Figure 3 The drive frame 203 includes a first rack 2031, a second rack 2032 and at least two connecting rods 2033.

[0063] Two connecting rods 2033 are arranged between the first rack 2031 and the second rack 2032, the first rack 2031 is in meshing connection with the first gear 202, and the second rack 2032 is in meshing connection with the second gear 204. The second rack 2032 is used to drive the first rack 2031 through the connecting rod 2033 to drive the first gear 202 to rotate.

[0064] Optionally, as shown in Figure 3 The electromagnetic interference isolation module 12 further comprises a third rack 205.

[0065] The second gear 204 and the first gear 202 located on the first side of the isolation cover 201, and the second gear 204 and the first gear 202 located on the third side of the isolation cover 201 are provided with a driving frame 203, and the first side of the isolation cover 201 and the third side of the isolation cover 201 are opposite sides. The second gear 204 and the first gear 202 located on the second side of the isolation cover 201, and the second gear 204 and the first gear 202 located on the fourth side of the isolation cover 201 are provided with a third rack 205, and the second side of the isolation cover 201 and the fourth side of the isolation cover 201 are opposite sides. One side of the third rack 205 is in meshing connection with the second gear 204, and the other side of the third rack 205 is in meshing connection with the first gear 202.

[0066] Specifically, after the second gear 204 is driven to rotate by the motor, the third rack 205 is driven to rotate by the second gear 204, so that the first gear 202 is driven to rotate by the third rack 205.

[0067] The advantages of such an arrangement are that, compared with the prior art of directly sleeving a metal isolation cover outside the data acquisition module and the energy storage device, the technical scheme of the embodiment drives the sealing plate to rotate when the data acquisition module is working, so as to seal the opening of the isolation cover after all the sealing plates are rotated by a certain angle, thereby isolating all electromagnetic interference from the outside of the isolation cover, ensuring the accuracy of the voltage data and current data collected by the data acquisition module, and providing a basis for accurately determining the health status of the energy storage device. By driving the sealing plate to rotate again when the data acquisition module stops working, the opening of the isolation cover is opened, which avoids the situation that the energy storage device is sealed in the isolation cover for a long time, so that the heat emitted by the energy storage device cannot be discharged in time, affecting the performance of the energy storage device.

[0068] The technical solution has the advantages that after determining that the power storage device is normal at the current operation period, the difference between the current voltage average value and the initial voltage average value and the difference between the current current average value and the initial current average value are determined again to determine whether the power storage device is normal at the current operation period, thereby avoiding the situation that the data collected at the current operation period and the previous operation period are both abnormal due to long-time operation of the power storage device, so that the health state determination result of the power storage device is inaccurate. In addition, the isolation cover is placed in the sealed state only when the data acquisition module is working, thereby avoiding the situation that the heat emitted by the power storage device cannot be discharged in time due to long-time sealing of the power storage device in the isolation cover, thereby affecting the performance of the power storage device.

[0069] Embodiment three

[0070] Figure 4 is a flowchart of a health state monitoring method of a power storage device according to embodiment three of the present application. The present embodiment is a further optimization and expansion based on the above-mentioned embodiments, and can be combined with each optional technical solution in the above-mentioned embodiments.

[0071] As shown in Figure 4 , the health state monitoring method of the power storage device disclosed in the present embodiment is applied to a health state monitoring system of a power storage device, and the method comprises the following steps.

[0072] S110, acquiring voltage values and current values of the power storage device at different time points by the data acquisition module, and sending the voltage values and the current values to the device state analysis module.

[0073] In this step, specifically, the preset overall test period can be divided into multiple operation periods containing the same number of time points, and the voltage values and the current values of the power storage device at a certain moment at different time points are acquired by the data acquisition module, and the voltage values and the current values at the certain moment are taken as the voltage values and the current values of the corresponding time points.

[0074] S120, isolating the power storage device and the data acquisition module in the electromagnetic interference isolation module by the electromagnetic interference isolation module when the data acquisition module is working, so as to avoid the influence of the electromagnetic interference equipment in the ring network cabinet on the accuracy of the voltage values and the current values collected by the data acquisition module.

[0075] S130, determining that the power storage device is normal at the current time point by the device state analysis module according to the current voltage value and the current current value collected by the data acquisition module at the current time point, acquiring a current operation period in which the current time point is located, and determining the health state of the power storage device at the current operation period according to the current voltage average value and the current current average value at the current operation period.

[0076] At this step, specifically, whether the power storage device is normal at the current time point can be determined according to the current voltage value, the upper limit value of the voltage, the current current value and the upper limit value of the current. Alternatively, a target time point corresponding to the current time point can be obtained, and a target voltage value and a target current value of the power storage device at the target time point can be obtained. Whether the power storage device is normal at the current time point can be determined according to a difference between the target voltage value and the current voltage value, and a difference between the target current value and the current current value. If it is determined that the power storage device is normal at the current time point, a current operation cycle in which the current time point is located and a historical operation cycle corresponding to the current operation cycle can be obtained. Then, a historical voltage average value and a historical current average value can be obtained, and a health state of the power storage device in the current operation cycle can be determined according to a difference between the historical voltage average value and the current voltage average value, and a difference between the historical current average value and the current current average value.

[0077] Optionally, after the current voltage value and the current current value collected by the data collection module at the current time point are received, and it is determined that the current operation cycle in which the current time point is located is not an initial operation cycle of the power storage device, a previous operation cycle in which voltage values and current values closest to the current operation cycle are located can be obtained. Each operation cycle includes a set number of time points. Then, a target time point corresponding to the current time point in the previous operation cycle can be obtained, and a target voltage value and a target current value collected by the data collection module at the target time point can be obtained. If a difference between the target voltage value and the current voltage value is less than a first preset voltage difference value, and a difference between the target current value and the current current value is less than a first preset current difference value, it is determined that the power storage device is normal at the current time point. If the difference between the target voltage value and the current voltage value is greater than or equal to the first preset voltage difference value, or the difference between the target current value and the current current value is greater than or equal to the first preset current difference value, it is determined that the power storage device is abnormal at the current time point.

[0078] Optionally, if the difference between the current voltage average value and the previous voltage average value is greater than or equal to the second preset voltage difference value, or the difference between the current current average value and the previous current average value is greater than or equal to the second preset current difference value, it is determined that the energy storage device is abnormal in the current operation period.

[0079] Optionally, if the difference between the current voltage average value and the previous voltage average value is greater than or equal to the second preset voltage difference value, or the difference between the current current average value and the previous current average value is greater than or equal to the second preset current difference value, it is determined that the energy storage device is abnormal in the current operation period.

[0080] Optionally, the device state analysis module can communicate with the user terminal, for example, sending the health status of the energy storage device to the user, and receiving the operation instruction of the user.

[0081] The technical scheme of the embodiment, through the data acquisition module, acquires the voltage value and the current value of the energy storage device at different time points, and sends the voltage value and the current value to the device state analysis module; through the electromagnetic interference isolation module, the energy storage device and the data acquisition module are isolated in the electromagnetic interference isolation module when the data acquisition module works, so as to avoid the influence of the electromagnetic interference equipment in the ring network cabinet on the accuracy of the voltage value and the current value collected by the data acquisition module; through the device state analysis module, after it is determined that the energy storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point, the current operation period in which the current time point is located is acquired, and the health status of the energy storage device in the current operation period is determined according to the current voltage average value and the current current average value in the current operation period, which solves the problem that the health status of the energy storage device is monitored by manual, resulting in low monitoring efficiency and high cost of the energy storage device, reduces the cost of monitoring the health status of the energy storage device, and improves the efficiency and accuracy of determining the health status of the energy storage device.

[0082] It should be understood that the various forms of flow shown above can be used to reorder, add, or remove steps. For example, the steps described in the present application can be performed in parallel, in series, or in a different order, as long as the desired results of the technical solutions of the present application can be achieved, which are not limited herein.

[0083] The above detailed description does 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 health state monitoring system of an electrical storage device, characterized by, The system comprises a data acquisition module, an electromagnetic interference isolation module and a device state analysis module; The device state analysis module is connected with the data acquisition module, the data acquisition module is connected with the power storage device, the data acquisition module and the power storage device are arranged in the electromagnetic interference isolation module, and the electromagnetic interference isolation module and the device state analysis module are arranged in the ring network cabinet; The data acquisition module is configured to acquire voltage values and current values of the power storage device at different time points and send the voltage values and the current values to the device state analysis module; The electromagnetic interference isolation module is configured to isolate the power storage device and the data acquisition module in the electromagnetic interference isolation module when the data acquisition module is working, so as to avoid the influence of electromagnetic interference devices in the ring network cabinet on the accuracy of the voltage values and the current values collected by the data acquisition module; The device state analysis module is configured to determine the health state of the power storage device in the current operation period according to the current voltage average value and the current current average value in the current operation period after determining that the power storage device is normal at the current time point. The device state analysis module is specifically configured to: After receiving the current voltage value and the current current value collected by the data acquisition module at the current time point and determining that the current operation period is not the initial operation period of the power storage device, the device state analysis module acquires the last operation period in which the voltage value and the current value closest to the current operation period are located. Each operation period includes a set number of time points. The device state analysis module acquires the target time point corresponding to the current time point in the last operation period and acquires the target voltage value and the target current value collected by the data acquisition module at the target time point. If the difference between the target voltage value and the current voltage value is less than a first preset voltage difference value, and the difference between the target current value and the current current value is less than a first preset current difference value, it is determined that the power storage device is normal at the current time point. If the difference between the target voltage value and the current voltage value is greater than or equal to the first preset voltage difference value, or the difference between the target current value and the current current value is greater than or equal to the first preset current difference value, it is determined that the power storage device is abnormal at the current time point. The device state analysis module is further specifically configured to: When it is determined that the power storage device is normal at the current time point, the device state analysis module acquires the current voltage average value and the current current average value in the current operation period, and the last voltage average value and the last current average value in the last operation period. If the difference between the current voltage average value and the last voltage average value is less than a second preset voltage difference value, and the difference between the current current average value and the last current average value is less than a second preset current difference value, it is determined whether each time point in the current operation period is greater than any time point in the preset operation period. If yes, an initial voltage average value and an initial current average value corresponding to an initial running cycle are obtained, and if a difference between the current voltage average value and the initial voltage average value is less than a third preset voltage difference value and a difference between the current current average value and the initial current average value is less than a third preset current difference value, it is determined that the power storage device is normal in the current running cycle; If the difference between the current voltage average value and the initial voltage average value is greater than or equal to the third preset voltage difference value and the difference between the current current average value and the initial current average value is greater than or equal to the third preset current difference value, it is determined that the power storage device is abnormal in the current running cycle; If no, the power storage device is directly output as normal in the current running cycle.

2. The system of claim 1, wherein, The device state analysis module is further configured to: If the difference between the current voltage average value and the previous voltage average value is greater than or equal to a second preset voltage difference value or the difference between the current current average value and the previous current average value is greater than or equal to a second preset current difference value, it is determined that the power storage device is abnormal in the current running cycle.

3. The system of claim 1, wherein, The electromagnetic interference isolation module comprises an isolation cover, a first gear, a driving frame and a second gear; The isolation cover is arranged above the power storage device and the data acquisition module, the first gear, the driving frame and the second gear are arranged at the top end of the isolation cover, and the driving frame is arranged between the first gear and the second gear. The side surfaces of the isolation cover are all open, at least one rotating shaft is arranged in each opening, each rotating shaft is fixedly connected with a sealing plate, and each rotating shaft is fixedly connected with the first gear arranged at the top end of the isolation cover. The second gear is configured to drive the first gear connected with the driving frame to rotate through the driving frame, and drive the rotating shaft connected with the first gear to rotate through the first gear.

4. The system of claim 3, wherein, The driving frame comprises a first rack, a second rack and at least two connecting rods; The two connecting rods are fixedly arranged between the first rack and the second rack, the first rack is meshingly connected with the first gear, and the second rack is meshingly connected with the second gear. The second rack is configured to drive the first rack to drive the first gear to rotate through the connecting rod.

5. The system of claim 3, wherein, The electromagnetic interference isolation module further comprises a third rack; The second gear and the first gear located on the first side of the isolation cover are connected through the driving frame, and the second gear and the first gear located on the third side of the isolation cover are connected through the driving frame. The second gear and the first gear located on the second side of the isolation cover are connected through the third rack, and the second gear and the first gear located on the fourth side of the isolation cover are connected through the third rack. The first side and the third side are opposite sides, and the second side and the fourth side are opposite sides. One side of the third rack is meshingly connected with the second gear, and the other side of the third rack is meshingly connected with the first gear.

6. A method for monitoring the health status of an energy storage device, characterized in that, The method is applied to the health state monitoring system of the power storage device as claimed in any one of claims 1-5, and the method comprises: The voltage value and the current value of the power storage device at different time points are acquired by the data acquisition module, and the voltage value and the current value are sent to the device state analysis module; The power storage device and the data acquisition module are isolated in the electromagnetic interference isolation module when the data acquisition module is working, so as to avoid the influence of the electromagnetic interference equipment in the ring network cabinet on the accuracy of the voltage value and the current value collected by the data acquisition module; The current running cycle in which the current time point is located is acquired after the device state analysis module determines that the power storage device is normal at the current time point according to the current voltage value and the current current value collected by the data acquisition module at the current time point, and the health status of the power storage device in the current running cycle is determined according to the current voltage average value and the current current average value in the current running cycle; The current voltage value and the current current value collected by the data acquisition module at the current time point are received, and it is determined that the current running cycle in which the current time point is located is not the initial running cycle of the power storage device, and the last running cycle in which the voltage value and the current value closest to the current running cycle are located is acquired; Each running cycle includes a set number of time points; The target time point corresponding to the current time point in the last running cycle is acquired, and the target voltage value and the target current value collected by the data acquisition module at the target time point are acquired; If the difference between the target voltage value and the current voltage value is less than the first preset voltage difference value, and the difference between the target current value and the current current value is less than the first preset current difference value, it is determined that the power storage device is normal at the current time point; If the difference between the target voltage value and the current voltage value is greater than or equal to the first preset voltage difference value, or the difference between the target current value and the current current value is greater than or equal to the first preset current difference value, it is determined that the power storage device is abnormal at the current time point; The current voltage average value and the current current average value in the current running cycle and the last voltage average value and the last current average value in the last running cycle are acquired when it is determined that the power storage device is normal at the current time point, and it is determined whether each time point in the current running cycle is greater than any time point in the preset running cycle if the difference between the current voltage average value and the last voltage average value is less than the second preset voltage difference value, and the difference between the current current average value and the last current average value is less than the second preset current difference value; If yes, the initial voltage average value and the initial current average value corresponding to the initial running cycle are acquired, and it is determined that the power storage device is normal in the current running cycle if the difference between the current voltage average value and the initial voltage average value is less than the third preset voltage difference value, and the difference between the current current average value and the initial current average value is less than the third preset current difference value; ​ ​ ​ If the difference between the current voltage average value and the initial voltage average value is greater than or equal to a third preset voltage difference value, and the difference between the current current average value and the initial current average value is greater than or equal to a third preset current difference value, it is determined that the power storage device is abnormal in the current operation cycle; If not, directly output that the power storage device is normal in the current operation cycle.

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