Liquid leakage monitoring device, method and system and application device thereof
By forming monitoring points through staggered electrode layers and utilizing capacitance information and the principle of projected self-inductance capacitance, the problem of low accuracy in battery leakage detection is solved, and timely and accurate monitoring of internal battery leakage and dynamic path tracking are achieved.
Patent Information
- Application Number
- CN202510608604.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-09-12
AI Technical Summary
In the existing technology, the accuracy of battery leakage detection is poor, and it is impossible to monitor the leakage inside the battery in a timely and accurate manner. In particular, when identifying water ingress into the battery pack sealing structure, it is difficult to describe the dynamic situation of the ingress water flow.
Monitoring points are formed by staggered first and second electrode layers. The capacitance information of the monitoring points is used to determine whether water has entered the monitoring area. The principle of projected self-inductance capacitance is used to sense the capacitance change between the electrodes to determine the leakage location. Combined with the waterproof structure and control module, accurate monitoring is achieved.
It realizes timely monitoring of internal battery leakage, improves the accuracy of leakage location judgment, can dynamically track the water inlet path, and reduces detection cost and complexity.
Smart Images
Figure CN120628461A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of battery monitoring technology, and in particular to a leakage monitoring device, system, battery management system, battery system, electrical equipment, electric energy equipment, leakage identification method, device, electronic equipment, storage medium and program product. Background Art
[0002] The core driving force of new energy vehicles comes from power batteries. As high-energy-density, electrically charged carriers, their sealing and waterproofing properties are crucial. If a power battery's sealing and waterproofing fails, even small leaks, if not detected in time, could cause internal short circuits, cell material deterioration, or even a thermal runaway chain reaction, seriously threatening the safety of the entire vehicle.
[0003] Currently, multiple positive and negative conductors are embedded in a checkerboard pattern within the same organic layer, covering the entire organic layer at the flow battery detection point. If leakage from the battery seeps into the organic layer, current is conducted at the intersection of the positive and negative conductors, altering the resistance of the entire circuit and ultimately triggering an alarm. However, this solution requires leakage to reach the intersection of the positive and negative conductors before an alarm is triggered, resulting in poor accuracy.
[0004] Therefore, timely and accurate monitoring of battery leakage is an urgent problem to be solved. Summary of the Invention
[0005] The embodiments of the present application provide a leakage monitoring device, system, battery management system, battery system, electrical equipment, electrical energy equipment, leakage identification method, device, electronic equipment, storage medium and program product, which are used to achieve the effect of timely and accurate monitoring of internal leakage of the battery.
[0006] In a first aspect, an embodiment of the present application provides a liquid leakage monitoring device, comprising a liquid leakage monitoring component and a control module, wherein the liquid leakage monitoring component and the control module are connected;
[0007] The liquid leakage monitoring component includes two stacked first electrode layers and a second electrode layer;
[0008] The first electrode layer is provided with multiple rows of first electrodes, and the second electrode layer is provided with multiple rows of second electrodes, the multiple rows of first electrodes and the multiple rows of second electrodes are staggered, and any intersecting first electrode and second electrode constitute a monitoring point in the monitoring area;
[0009] The control module is used to drive the first electrode and the second electrode and obtain capacitance information of the monitoring point; the capacitance information is used to determine whether water has entered the monitoring area.
[0010] In one embodiment, the control module includes a driving unit, a sensing unit, and a control unit;
[0011] The control unit is connected to the driving unit and the sensing unit respectively;
[0012] The driving unit is connected to both ends of the first electrode and both ends of the second electrode; the driving unit is used to drive the first electrode and the second electrode;
[0013] The sensing unit is connected to both ends of the first electrode and both ends of the second electrode; the sensing unit is used to sample and obtain sensing signals of the first electrode and the second electrode;
[0014] The control unit is used to generate capacitance information of the monitoring point based on the sensing signals of the first electrode and the second electrode.
[0015] In one embodiment, a driving bus and a sensing bus are further provided on the first electrode layer and the second electrode layer;
[0016] The driving unit is connected to the first electrode and the second electrode via a driving bus;
[0017] The sensing unit is connected to the first electrode and the second electrode through a sensing bus.
[0018] In one embodiment, a waterproof structure is provided on the liquid leakage monitoring component.
[0019] In one embodiment, the first electrodes of the first electrode layer and the second electrodes of the second electrode layer are both geometrically shaped conductive material electrodes and are arranged in an array structure.
[0020] In one embodiment, the thickness of the first electrode is less than the thickness of the first electrode layer;
[0021] The thickness of the second electrode is smaller than the thickness of the second electrode layer.
[0022] In one embodiment, an isolation layer is provided between the first electrode layer and the second electrode layer.
[0023] In one embodiment, the thickness of the first electrode layer and the second electrode layer is less than or equal to a preset value.
[0024] In one embodiment, an insulating waterproof layer is provided at the bottom of the leakage monitoring assembly.
[0025] In a second aspect, an embodiment of the present application provides a liquid leakage monitoring system, comprising a processing module and any of the above-mentioned liquid leakage monitoring devices; the liquid leakage monitoring device is connected to the processing module;
[0026] The leakage monitoring device is arranged in the area to be monitored of the sealing structure of the battery;
[0027] The processing module is used to determine whether water has entered the monitored area based on the capacitance information of the monitoring point.
[0028] In one embodiment, there are multiple leakage monitoring devices;
[0029] Different leakage monitoring devices are arranged in different areas to be monitored of the sealing structure.
[0030] In one embodiment, the processing module is further configured to:
[0031] When it is determined that water has entered the monitored area based on the capacity information of the monitoring point, an alarm message is output.
[0032] In one embodiment, the processing module is further configured to:
[0033] When water ingress is determined in the monitored area based on the capacitance information of the monitoring points, the water ingress position and / or water ingress time is determined based on the capacitance change corresponding to the monitoring points.
[0034] In one embodiment, the processing module is further configured to:
[0035] When water inflow is determined in the monitored area based on the capacitance information of the monitoring point, the amount of water inflow and / or the path of water movement are determined based on the capacitance change corresponding to the monitoring point and the sampling time.
[0036] In a third aspect, an embodiment of the present application provides a battery management system, including any of the above-mentioned leakage monitoring systems.
[0037] In a fourth aspect, an embodiment of the present application provides a battery system, comprising a battery and the battery management system as described above.
[0038] In a fifth aspect, an embodiment of the present application provides an electrical device including the above-mentioned battery system.
[0039] In a sixth aspect, an embodiment of the present application provides an electric energy device, comprising the above-mentioned battery system.
[0040] In a seventh aspect, an embodiment of the present application provides a method for identifying a liquid leakage, comprising:
[0041] Obtain the capacitance information of monitoring points within the monitoring area;
[0042] Determine whether water has entered the monitored area based on the capacitance information of the monitoring point.
[0043] In an eighth aspect, an embodiment of the present application provides a liquid leakage identification device, comprising:
[0044] An acquisition device, used to obtain capacitance information of monitoring points within a monitoring area;
[0045] The processing device is used to determine whether water has entered the area to be monitored based on the capacitance information of the monitoring point.
[0046] In a ninth aspect, an embodiment of the present application provides an electronic device, the electronic device comprising: a processor, and a memory communicatively connected to the processor;
[0047] Memory stores computer-executable instructions;
[0048] The processor executes the computer-executable instructions stored in the memory to implement the above-mentioned method.
[0049] In a tenth aspect, an embodiment of the present application provides a computer-readable storage medium, in which computer-executable instructions are stored. When the computer-executable instructions are executed by a processor, they are used to implement the method as described above.
[0050] In an eleventh aspect, an embodiment of the present application provides a computer program product, comprising a computer program, which implements the above method when executed by a processor.
[0051] The embodiments of the present application provide a leakage monitoring device, system, battery management system, battery system, electrical equipment, electrical energy equipment, leakage identification method, device, electronic equipment, storage medium and program product. The device includes a leakage monitoring component and a control module, and the leakage monitoring component and the control module are connected. The leakage monitoring component includes two stacked first electrode layers and a second electrode layer. The first electrode layer is provided with multiple rows of first electrodes, and the second electrode layer is provided with multiple rows of second electrodes. The multiple rows of first electrodes and the multiple rows of second electrodes are staggered, and any intersecting first and second electrodes constitute a monitoring point in the monitoring area. The control module is used to drive the first and second electrodes and obtain capacitance information of the monitoring points. The capacitance information is used to determine whether water has entered the monitoring area. The monitoring points formed by the first and second electrodes are used to determine whether water has entered the monitoring area through the capacitance information of the monitoring points, thereby timely monitoring the leakage situation inside the battery. Secondly, the first and second electrodes in the first and second electrode layers are staggered. The capacitance information of the monitoring points can be used to monitor any position in the monitoring area, making the judgment of the water ingress position more accurate. BRIEF DESCRIPTION OF THE DRAWINGS
[0052] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.
[0053] Figure 1 A schematic structural diagram of a liquid leakage monitoring device provided in one embodiment of the present application;
[0054] Figure 2 A schematic structural diagram of a liquid leakage monitoring device provided in one embodiment of the present application;
[0055] Figure 3 A schematic top view of a liquid leakage monitoring device provided in one embodiment of the present application;
[0056] Figure 4 For this application Figure 3 A side view of the liquid leakage monitoring device in the embodiment;
[0057] Figure 5 For this application Figure 3 An oblique cross-sectional view of the leakage monitoring device in the embodiment;
[0058] Figure 6 A schematic diagram of liquid leakage at different locations in the monitoring area provided in one embodiment of the present application;
[0059] Figure 7 A schematic diagram of a liquid leakage monitoring system provided in one embodiment of the present application;
[0060] Figure 8 A flowchart of a method for identifying a liquid leakage according to an embodiment of the present application;
[0061] Figure 9 This is a schematic diagram of the structure of the electronic device provided in this application.
[0062] Reference numerals:
[0063] 100, leakage monitoring component; 200, control module; Dx, first electrode; Sy, second electrode; 210, drive unit; 220, sensing unit; 230, control unit; 1-1, first layer of PCB board; 1-2, first electrode layer; 1-3, second electrode layer; 6, waterproof wiring harness; 7, waterproof glue layer; 8, insulating waterproof layer; 9, isolation layer; 130, monitoring area; 710, leakage monitoring device; 720, processing module.
[0064] The above drawings illustrate specific embodiments of the present application, which will be described in more detail below. These drawings and the textual description are not intended to limit the scope of the present application in any way, but rather to illustrate the concepts of the present application to those skilled in the art by reference to specific embodiments. DETAILED DESCRIPTION
[0065] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
[0066] Existing Technology: A flow battery leakage detection device is constructed by embedding multiple positive and negative conductors in a checkerboard pattern within a single organic layer, with minimal gaps between the positive and negative conductors. This layer covers the flow battery detection area. If leakage from the battery seeps into the organic layer, current conducts at the intersection of the positive and negative conductors, altering the overall circuit resistance and ultimately triggering an alarm.
[0067] Disadvantages: This solution requires leaked liquid to reach the intersection of the positive and negative conductors before an alarm is triggered, resulting in relatively poor accuracy. Improving accuracy would increase the cost and complexity of the device. Furthermore, the circuit can only statically detect battery fluid that has penetrated the organic layer, determining whether leakage has occurred. If the device is directly used to identify water ingress within the battery pack's sealed structure, it would be difficult to describe the dynamic state of the water flow.
[0068] To address the shortcomings of the prior art, the inventors of this proposal have conducted creative research and designed a new solution. This solution provides a leakage detection device to address the problem of poor accuracy in leakage detection through resistance changes in the prior art. The specific application scenarios of this application are the new energy vehicle industry, energy storage systems, electronic equipment, battery production, and battery maintenance and testing, etc. This application is not limited to the above-mentioned application scenarios.
[0069] In combination with the above scenarios, it can be seen that in the prior art, the use of a resistance circuit to determine leakage through resistance changes has a technical problem of relatively poor accuracy.
[0070] The leakage monitoring device provided in the present application determines whether water has entered the monitoring area through the monitoring point formed by the first electrode and the second electrode through the capacitance information of the monitoring point, thereby timely monitoring the leakage situation inside the battery; secondly, the first electrode and the second electrode in the first electrode layer and the second electrode layer are arranged alternately, and the capacitance information of the monitoring point can be used to monitor any position in the monitoring area, so that the water ingress position can be judged more accurately, thereby improving the monitoring accuracy.
[0071] The following specific embodiments describe in detail the technical solution of the present application and how the technical solution of the present application solves the above-mentioned technical problems. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.
[0072] like Figure 1 As shown, Figure 1This is a schematic diagram of the structure of a liquid leakage monitoring device provided in one embodiment of the present application. The liquid leakage monitoring device includes a liquid leakage monitoring component 100 and a control module 200, which are connected to each other. The liquid leakage monitoring component 100 includes two stacked first and second electrode layers. The first electrode layer is provided with multiple rows of first electrodes Dx, and the second electrode layer is provided with multiple rows of second electrodes Sy. The multiple rows of first electrodes Dx and multiple rows of second electrodes Sy are arranged in an alternating manner, and any intersecting first electrodes Dx and second electrodes Sy constitute a monitoring point in the monitoring area 130. The control module 200 is used to drive the first electrodes Dx and second electrodes Sy and obtain capacitance information of the monitoring point. The capacitance information is used to determine whether water has entered the monitoring area 130.
[0073] Specifically, when liquid enters the monitoring area 130, the dielectric constant of the liquid is different from that of the air, which will cause the capacitance between the electrodes to change. The control module 200 drives the first electrode Dx and the second electrode Sy, and measures the capacitance information of each monitoring point to determine whether liquid has entered the monitoring area 130. By comparing the capacitance changes at different monitoring points, the location of the leakage can be accurately located. The first electrode layer and the second electrode layer are staggered to form multiple monitoring points. The design of multiple rows of electrodes can achieve large-area monitoring, and at the same time improve the detection accuracy through the capacitor matrix; secondly, the location of the leakage can be accurately located and measures can be taken quickly. Among them, the capacitance information includes the distribution of the capacitance and the capacitance of the capacitance. Among them, Figure 1 The colors in the figure are only for the convenience of distinguishing the first electrode from the second electrode and have no other meaning.
[0074] The present application forms a monitoring point by the first electrode Dx and the second electrode Sy, and determines whether water has entered the monitoring area 130 through the capacitance information of the monitoring point, thereby timely monitoring the leakage inside the battery; secondly, compared with the resistance scheme of the prior art that can only detect leakage at the intersection of the resistance wires, the present application can monitor any position of the monitoring area 130 through the capacitance information of the monitoring point, making the water ingress position judgment more accurate and improving the monitoring accuracy.
[0075] In one embodiment, the leakage monitoring device is tested before shipment by dripping water at different locations within the monitoring area 130 to monitor its operating status. The initial capacitance value of the leakage monitoring assembly 100 without dripping water is recorded, as well as the capacitance distribution of the leakage monitoring assembly 100 under the influence of water drops at different locations. This is used to determine the capacitance change of the leakage monitoring device when water enters the device. Alternatively, the capacitance change at a set monitoring point from the initial capacitance value to the monitored capacitance value is used to determine if leakage is present within the battery.
[0076] In one embodiment, the number of the first electrodes Dx and the second electrodes Sy is adjustable. Specifically, the number of the first electrodes Dx and the second electrodes Sy can be adjusted according to actual needs to accommodate monitoring areas 130 of different sizes and shapes.
[0077] Specifically, the first electrode layer 1-2 is provided with multiple rows of first electrodes Dx, and the second electrode layer 1-3 is provided with multiple rows of second electrodes Sy. The first electrodes Dx and the second electrodes Sy are arranged in a staggered manner. The terms x and y herein represent the number of rows of electrodes, and are both integers greater than or equal to 1. The maximum values of x and y can be the same or different, depending on the number of rows of electrodes provided in the electrode layer. Figure 1 This is a schematic diagram taking the x value as 4 and the y value as 8 as an example.
[0078] The first electrode Dx and / or the second electrode Sy can be regarded as a sensor. Taking the first electrode Dx as an example, there is a capacitance value between the first electrode Dx and the ground. When a water droplet falls on the waterproof structure of the monitoring area 130, a parallel circuit is formed between the water droplet and the first electrode Dx, which will change the internal capacitance value of the electrode near the location of the water droplet. The capacitance information of the first electrode Dx and the second electrode Sy is monitored by the sensing unit 220. Therefore, by checking which first electrode Dx on the x-axis and which second electrode Sy on the y-axis have the largest capacitance change (or the largest deviation from the initial capacitance value), the initial position of the water droplet in the monitoring area 130, i.e., the x and y coordinate positions, can be locked.
[0079] In one embodiment, Figure 2 As shown, Figure 2 This is a schematic diagram of the structure of a liquid leakage monitoring device 710 provided in one embodiment of the present application. The control module 200 includes a driving unit 210, a sensing unit 220, and a control unit 230; the control unit 230 is connected to the driving unit 210 and the sensing unit 220 respectively; the driving unit 210 is connected to both ends of the first electrode Dx and both ends of the second electrode Sy; the driving unit 210 is used to drive the first electrode Dx and the second electrode Sy; the sensing unit 220 is connected to both ends of the first electrode Dx and both ends of the second electrode Sy; the sensing unit 220 is used to sample and obtain sensing signals from the first electrode Dx and the second electrode Sy; and the control unit 230 is used to generate capacitance information of the monitoring point based on the sensing signals from the first electrode Dx and the second electrode Sy.
[0080] Specifically, the control unit 230 sends a driving signal through the driving unit 210, and the control unit 230 sends an instruction to the driving unit 210. The driving unit 210 applies an excitation signal to the first electrode Dx and the second electrode Sy according to the instruction. The excitation signal can be a periodic voltage or current pulse, which is used to excite the electric field between the electrodes. The present application adopts the projected self-inductance capacitance principle. The sensing unit 220 detects the sensing signals of the first electrode Dx and the second electrode Sy respectively. The sensing signal reflects the capacitance change of the first electrode and the second electrode before and after encountering water. When liquid enters the monitoring area 130, the capacitance increases. The present application affects the capacitance change of the first electrode Dx and the second electrode Sy when liquid enters. It has high sensitivity and can monitor tiny leakage.
[0081] In one embodiment, please refer to Figure 2 A driving bus and a sensing bus are also provided on the first electrode layer 1-2 and the second electrode layer 1-3; the driving unit 210 is connected to the first electrode Dx and the second electrode Sy through the driving bus; the sensing unit 220 is connected to the first electrode Dx and the second electrode Sy through the sensing bus.
[0082] Specifically, the first electrode layer 1-2 is also provided with a drive bus and a sensing bus of the first electrode Dx. At the same time, the second electrode layer 1-3 is also provided with a drive bus and a sensing bus of the second electrode Sy. The drive bus is used to connect the drive unit 210 and the first electrode Dx and the second electrode Sy; the sensing bus is used to connect the sensing unit 220 and the first electrode Dx and the second electrode Sy. This application adopts the principle of projected self-inductance capacitance. When a voltage is applied to the electrode, an electric field is formed around the electrode. This electric field will make the electrode have a certain capacitance. When the liquid approaches or contacts the electrode, a parallel circuit is formed between the water droplet and the first electrode Dx, which will change the internal capacitance value of the electrode near the water droplet position. The sensing unit determines whether water has entered the monitoring area by detecting the capacitance change of the electrode.
[0083] In one embodiment, the leakage monitoring assembly 100 is provided with a waterproof structure.
[0084] Optionally, the waterproof structure is a waterproof membrane. The thickness of the waterproof structure can be determined according to actual conditions, and this application does not limit it here. In this example, the thickness of the waterproof structure does not exceed 1 mm. Specifically, the design of the waterproof structure not only ensures that the first electrode Dx and the second electrode Sy are not in direct contact with water, but also ensures that the water flow has an impact on the capacitance value of the copper foil. Compared with the resistance scheme in the prior art, the present application only has two resistance change states of conduction and non-conduction, and the corresponding detection points are often unable to perform subsequent tests after encountering water. The leakage monitoring component 100 of the present application is not in direct contact with water. When the leakage monitoring component 100 detects water ingress, the capacitance information it monitors will change dynamically with the dynamic situation of the water. It can still work well after water ingress, can better track the water inlet path, and has stronger test universality.
[0085] In one embodiment, the first electrodes Dx of the first electrode layer 1 - 2 and the second electrodes Sy of the second electrode layer 1 - 3 are both geometrically shaped conductive material electrodes and are arranged in an array structure.
[0086] Specifically, the geometric shape includes but is not limited to rhombus, rectangle, and trapezoid. The conductive material includes but is not limited to metal, conductive polymer, and conductive composite material. The array structure includes but is not limited to string, grid, and matrix. Please refer to Figure 1 and Figure 2 , the first electrode Dx and the second electrode Sy are a diamond copper foil string structure. The geometric shape of the diamond electrode makes its electric field distribution more uniform. Compared with traditional rectangular or other shaped electrodes, the diamond structure can effectively reduce the edge effect of the electric field, avoid detection errors caused by excessive local electric field strength, and improve sensitivity and stability. Secondly, the diagonal design of the diamond electrode increases the effective electric field coverage area between the electrodes, which can more accurately capture the capacitance change when the liquid enters the monitoring area 130. Even a tiny leak can be quickly detected through the change in capacitance. The diamond copper foil string structure forms a high-density monitoring point by staggering multiple rows of electrodes. This layout greatly improves the resolution of the monitoring area 130 and can more accurately locate the location of the leak.
[0087] In one embodiment, the spacing between the diamond electrodes is adjustable, and by adjusting the spacing between the diamond electrodes, the uniformity and monitoring accuracy are further improved.
[0088] In one embodiment, the corners of the diamond-shaped electrode are adjustable. Specifically, the corners of the diamond can be fine-tuned, such as by using a rounded corner design, to further reduce the edge effect of the electric field and improve the durability of the electrode.
[0089] In one embodiment, the thickness of the first electrode Dx is smaller than the thickness of the first electrode layer 1 - 2 ; the thickness of the second electrode Sy is smaller than the thickness of the second electrode layer 1 - 3 .
[0090] Specifically, the thickness of the first electrode Dx is less than the thickness of the first electrode layer 1-2; the thickness of the second electrode Sy is less than the thickness of the second electrode layer 1-3. This is to avoid the first electrode Dx and the second electrode Sy being too close in the vertical direction, to avoid direct contact and conduction between the first electrode Dx and the second electrode Sy, which would affect the monitoring results and cause false alarms.
[0091] In one embodiment, an isolation layer 9 is provided between the first electrode layer 1 - 2 and the second electrode layer 1 - 3 .
[0092] Specifically, isolation layer 9 is provided between first electrode layer 1-2 and second electrode layer 1-3 to prevent direct contact and conduction between first electrode Dx and second electrode Sy, which could affect monitoring results and cause false alarms. Optionally, isolation layer 9 is made of plastic to vertically isolate first x-axis electrode Dx from second y-axis electrode Sy.
[0093] In one embodiment, the thickness of the first electrode layer 1 - 2 and the second electrode layer 1 - 3 is less than or equal to a preset value.
[0094] Specifically, the thickness of the first electrode layer 1-2 and the second electrode layer 1-3 can be adjusted according to actual conditions. In this example, the thickness of the first electrode layer 1-2 and the second electrode layer 1-3 is less than or equal to 1.6 mm to ensure that the self-capacitance of the first electrode Dx and the second electrode Sy is sensitive to the water condition on their surfaces.
[0095] In one embodiment, the entire leakage monitoring device 710 can be integrated into a PCB circuit board, and the control module 200 is located on the upper layer of the leakage monitoring component 100. The entire device is designed to be waterproof to prevent internal damage caused by leakage.
[0096] In one embodiment, an insulating waterproof layer 8 is provided at the bottom of the liquid leakage monitoring assembly 100 .
[0097] Specifically, the insulating waterproof layer 8 is used to prevent the components in the leakage monitoring device 710 from being damaged by water ingress when leakage occurs. In one embodiment, the insulating waterproof layer 8 can be attached to the monitored area of the battery's sealing structure, thereby monitoring leakage inside the battery.
[0098] This application will be explained with an example. Figure 3 As shown, Figure 3 Schematic top view of a liquid leakage monitoring device 710 provided in one embodiment of the present application. Figure 4 For this application Figure 3A side view of a liquid leakage monitoring device 710 in an embodiment. Figure 5 For this application Figure 3 An oblique cross-sectional view of a liquid leakage monitoring device 710 in an embodiment. Figure 3 、 Figure 4 and Figure 5 The colors are for the convenience of distinction only and do not indicate anything else. Figure 3 、 Figure 4 and Figure 5 The main body of the leakage monitoring device 710 is composed of three layers of PCB boards, each with printed circuits. The first PCB board 1-1 carries the control module 200. The three PCB boards are stacked directly without gaps between them, and the circuit connections between the layers are achieved through through-holes. Within the monitoring area 130, the second PCB board is the first electrode layer 1-2, which is equipped with four first electrodes Dx on the x-axis. The first electrodes Dx are arranged in a diamond-shaped copper foil string structure. The third PCB board is the second electrode layer 1-3, which is equipped with eight second electrodes Sy on the y-axis. The second electrodes Sy are arranged in a diamond-shaped copper foil string structure. The first and second electrodes Dx and Sy are connected to the control module 200 by wires. The control module 200 records the capacitance value of each first electrode Dx and each second electrode Sy. The waterproof wiring harness 6 includes a data transmission line and a power line. The entire circuit board integrates the leakage monitoring component 100, the control module 200 and the waterproof wiring harness 6, which are connected through printed circuits, simplifying the structure, strengthening the integrated wiring, and facilitating installation and use. In one of the feasible methods, the first layer of PCB board 1-1 is hollowed out at the monitoring area 130, and the position of the monitoring area 130 on the first electrode layer 1-2 is covered with a waterproof film or filled with waterproof material. Waterproof potting glue is poured on the surface and sides of the entire circuit board. Among them, waterproof potting glue does not need to be poured above the monitoring area 130 to avoid affecting the monitoring accuracy. Figure 4 As can be seen in the figure, there is a waterproof glue layer 7 above the control module 200. The insulating waterproof layer 8 at the bottom of the circuit board can be glued and fixed to the sealing interface of the battery. The entire circuit board is waterproofed to prevent damage to components after water ingress. In this example, four x-axis and eight y-axis copper foil strips are set. This is not a fixed number and can be adjusted accordingly based on the size of the monitoring area 130 and the required accuracy. At the same time, the diamond size of the x-axis and y-axis copper foil is kept as consistent as possible to cover the entire detection area.
[0099] The copper foil is formed into multiple diamond-shaped strips connected in series. These strips are parallel to each other (on the x-axis or y-axis), while the x- and y-axis strips intersect perpendicularly. This ensures effective coverage of the entire monitoring area 130. Each strip can be considered a sensor, with a capacitance between it and the ground. When a water droplet lands on monitoring area 130, a parallel circuit is formed between the droplet and the strip, changing the internal capacitance of the strip near the droplet's location. This change is detected by circuits at each end of the strip. Therefore, by examining the x- and y-axis strips with the largest capacitance change (the largest deviation from the normal capacitance), the x and y coordinates of the water droplet can be located within monitoring area 130. Furthermore, the copper foil strips have a long sensing range and high sensitivity for water droplets. Even if a water droplet lands between two strips (or closer to one but not directly above it), the difference in position can be inferred from the difference in capacitance between the two strips, resulting in more accurate positioning.
[0100] Next, we will use four different water ingress situations to specifically illustrate the impact of water ingress on the capacitance value of the monitoring area 130. The specific capacitance values listed in the following examples are only for demonstration and relative comparison. The specific capacitance value change depends on the actual hardware. Moreover, water droplets at any position in the monitoring area 130 can simultaneously change the capacitance value of the 4 x-axis and 8 y-axis copper foil strips. Here, we only illustrate the capacitance value change of 1 to 2 copper foil strips closest to the water droplets. The capacitance value of copper foil strips farther away does not change much. Figure 6 As shown, Figure 6 A schematic diagram of liquid leakage at different locations in monitoring area 130, provided in one embodiment of the present application. The first electrode layer 1-2 is provided with four first electrodes Dx, designated 3-1 through 3-4; the second electrode layer 1-3 is provided with eight second electrodes Sy, designated 4-1 through 4-8. Assuming that the initial capacitance of the electrodes, when not exposed to water, is 10 (no specific unit is given, for reference only), in the embodiment of water ingress location A, a small amount of water falls near the intersection of the copper foil strips 3-3 and 4-2. In this case, copper foil strips 3-3 and 4-2 directly form a new capacitance with the water droplet. This new capacitance is connected in parallel with the original self-capacitance of copper foil strips 3-3 and 4-2 to ground, increasing the total capacitance of copper foil strips 3-3 and 4-2 detected by the control module 200. For example, the capacitance of copper foil strips 3-3 and 4-2 increases to 50, while the capacitance of the other copper foil strips remains at 10. On the other hand, if the recorded capacitance values only show an increase of 50 at 3-3 and 4-2, the control module 200 can determine the water ingress position. In the xy coordinate axis, the water drop position is at the intersection of 3-3 and 4-2.
[0101] Please refer to Figure 6In the embodiment of water inlet position B, a small amount of water enters between the copper foil strips 4-2 and 4-3 in the x-axis direction and between the copper foil strips 3-2 and 3-3 in the y-axis direction. In this case, there will be no change in the reading of the resistance sensor. However, in this application, the capacitance values of the copper foil strips 4-2, 4-3, 3-2, and 3-3 will all increase to 40 (lower than 50 and higher than 10), and the capacitance values of the other copper foil strips are 10. However, if the capacitance values of two adjacent copper foil strips are detected to increase at the same time, it can be determined that the water droplet is located between these two copper foils, and then the water inlet position can be determined. Compared with the resistance solution, the water leakage can be monitored more accurately.
[0102] In the embodiment of water inlet position C, please refer to Figure 6 , the water droplet remains between the copper foil strips, but is closer to copper foil strips 4-3 and 3-4, and farther away from copper foil strips 4-4 and 3-3. In this case, the capacitance increase between 4-3 and 3-4 is higher than that between 4-4 and 3-3. For example, the capacitance increase between 4-3 and 3-4 is 45, while the capacitance increase between 4-4 and 3-3 is 35. Therefore, when an increase in the capacitance of two adjacent copper foil strips is detected, and the increase is inconsistent, the capacitance distribution can be used to determine which copper foil strip the water droplet is closer to, and even the exact xy value of the location can be calculated based on the precise capacitance change.
[0103] exist Figure 6 In the embodiment where the water inlet position is D, the capacitance values of 3-1 to 3-4 all increase, and 3-1 and 3-4 are slightly lower than 3-2 and 3-3, while the capacitance values of 4-5 to 4-7 increase significantly. The capacitance values of other y-axis copper foil strips do not increase significantly, thereby determining the water inlet area.
[0104] Combine Figure 6 In the embodiment, the control module 200 can obtain the capacitance information of the monitoring point, that is, the capacitance value of the x- or y-axis copper foil strip corresponding to the water inlet increases, and the increase value is not consistent. The water inlet position and water inlet amount can be determined in turn through the distribution of this capacitance value change.
[0105] In one embodiment, the capacitance of the first electrode Dx and / or the second electrode Sy varies depending on the composition of the water source (tap water, salt water, muddy water, etc.). Therefore, the initial capacitance of the first electrode Dx and / or the second electrode Sy can be adjusted for different water sources. Specifically, the capacitance of the first electrode Dx and the second electrode Sy before contact with water is adjusted to improve the sensitivity of the entire leakage monitoring assembly 100, enabling detection of different types of leakage.
[0106] like Figure 7 As shown, Figure 7This is a schematic diagram of a leakage monitoring system according to an embodiment of the present application. The leakage monitoring system includes a processing module 720 and a leakage monitoring device 710, such as any of the aforementioned ones. The leakage monitoring device 710 is connected to the processing module 720. The leakage monitoring device 710 is located in the monitored area of the battery's sealed structure. The processing module 720 is configured to determine whether water has entered the monitored area 130 based on capacitance information at monitoring points within the monitored area 130.
[0107] In one embodiment, the area to be monitored overlaps or partially overlaps with the monitoring area 130 of the leakage monitoring device 710. When the area to be monitored overlaps or partially overlaps with the monitoring area 130 of the leakage monitoring device 710, when water enters the area to be monitored, it can be detected in time by the monitoring area 130 of the leakage monitoring device 710.
[0108] Specifically, the leakage monitoring device 710 is connected to the processing module 720 through the waterproof harness 6 to monitor the monitored area of the battery sealing structure to ensure that leakage of the battery sealing structure can be discovered in time, thereby improving the battery safety system and maintaining stable operation of the system.
[0109] In one embodiment, the processing module 720 may be a host computer or a locked power supply system.
[0110] In one embodiment, the leakage monitoring system further includes an alarm module, which is connected to the processing module 720 and is triggered after determining that water has entered the monitored area. The alarm module can be a buzzer or notify the terminal display of the water ingress.
[0111] In one embodiment, there are multiple leakage monitoring devices 710; different leakage monitoring devices 710 are arranged in different areas to be monitored in the sealing structure.
[0112] In one embodiment, the processing module 720 is further configured to output an alarm message when it is determined based on the capacitance information of the monitoring point that water has entered the monitored area.
[0113] Specifically, the leakage monitoring device 710 is installed in the monitored area of the battery's sealed structure. The processing module 720 is connected to the leakage monitoring device 710 via a signal line and receives capacitance information from the monitoring device. The processing module 720 includes a data processing unit and an alarm unit. The data processing unit analyzes the capacitance information to determine whether a leakage has occurred, while the alarm unit issues an alarm when a leakage is detected. Promptly detecting a leakage can effectively prevent safety accidents caused by the leakage and ensure the safety of equipment and personnel.
[0114] In one embodiment, the processing module 720 is further configured to: when it is determined that water has entered the monitored area based on the capacitance information of the monitoring point, determine the water ingress position and / or water ingress time based on the capacitance change corresponding to the monitoring point.
[0115] In one embodiment, the processing module 720 is further used to: when it is determined that water has entered the monitored area based on the capacitance information of the monitoring point, determine the amount of water entering and / or the path of water movement based on the capacitance change corresponding to the monitoring point and the sampling time.
[0116] Specifically, compared to the resistance scheme, which only has two resistance change states (conduction and non-conduction), and often cannot perform subsequent testing on the corresponding detection points after contact with water, the leakage monitoring component 100 of the present application does not directly contact water. The capacitance distribution and value will change dynamically with the dynamic situation of the water. It can continue to work well after water ingress and can better track the water ingress path. Compared with previous testing methods, the present application has higher accuracy in determining the water ingress location, stronger dynamic analysis capabilities for the water ingress path, and can trigger an alarm. It has a simple structure and reliable performance, which can significantly improve testing efficiency and reduce testing manpower and resource costs.
[0117] An embodiment of the present application provides a battery management system, including any of the above-mentioned leakage monitoring systems.
[0118] An embodiment of the present application provides a battery system, including a battery and the battery management system as described above.
[0119] An embodiment of the present application provides an electrical device including the above-mentioned battery system.
[0120] An embodiment of the present application provides an electric energy device, including the above-mentioned battery system.
[0121] like Figure 8 As shown, Figure 8 This is a flowchart of a method for identifying a liquid leakage according to an embodiment of the present application. The method includes the following steps:
[0122] Step S801: Acquire the content value information of the monitoring points in the monitoring area 130.
[0123] Step S802: Determine whether water has entered the area to be monitored based on the capacitance information of the monitoring point.
[0124] The present application forms a monitoring point through the first electrode Dx and the second electrode Sy, and determines whether water has entered the monitored area through the capacitance information of the monitoring point, thereby timely monitoring the internal leakage of the battery; the water ingress location is judged more accurately, thereby improving the monitoring accuracy.
[0125] An embodiment of the present application provides a liquid leakage identification device, including: an acquisition device for acquiring capacity value information of monitoring points in the monitoring area 130; and a processing device for determining whether water has entered the monitored area based on the capacity value information of the monitoring points.
[0126] The liquid leakage identification device provided in this embodiment can execute the method provided in the above method embodiment. Its implementation principle and technical effects are similar, and are not described in detail in this embodiment.
[0127] An embodiment of the present application provides an electronic device, which includes: a processor, and a memory communicatively connected to the processor; the memory stores computer-executable instructions; and the processor executes the computer-executable instructions stored in the memory to implement the method described above.
[0128] Figure 9 This is a schematic diagram of the structure of the electronic device provided in this application. Figure 9 As shown, the electronic device 900 provided in this embodiment includes: at least one processor 901 and a memory 902. Optionally, the electronic device 900 further includes a communication component 903. The processor 901, the memory 902 and the communication component 903 are connected via a bus 904.
[0129] During the specific implementation process, at least one processor 901 executes the computer-executable instructions stored in the memory 902, so that the at least one processor 901 performs the above method.
[0130] The specific implementation process of the processor 901 can be found in the above method embodiment. Its implementation principle and technical effects are similar and will not be repeated here in this embodiment.
[0131] In the above embodiments, it should be understood that the processor may be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), etc. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the method disclosed in the present invention may be directly implemented by a hardware processor or implemented by a combination of hardware and software modules in the processor.
[0132] The memory may include random access memory (RAM) and may also include non-volatile memory (NVM), such as at least one disk storage.
[0133] A bus can be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus. Buses can be categorized as address buses, data buses, and control buses. For ease of illustration, the buses in the drawings of this application are not limited to just one bus or just one type of bus.
[0134] The present application also provides a computer program product, including a computer program, which implements the above method when executed by a processor.
[0135] The present application also provides a computer-readable storage medium, in which computer-executable instructions are stored. When a processor executes the computer-executable instructions, the above method is implemented.
[0136] The readable storage medium may be implemented by any type of volatile or non-volatile memory device, or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk. The readable storage medium may be any available medium that can be accessed by a general-purpose or special-purpose computer.
[0137] An exemplary readable storage medium is coupled to a processor so that the processor can read information from the readable storage medium and write information to the readable storage medium. Of course, the readable storage medium can also be an integral part of the processor. The processor and the readable storage medium can be located in an application specific integrated circuit (ASIC). Of course, the processor and the readable storage medium can also exist in a device as discrete components.
[0138] The division of units is merely a logical functional division; actual implementations may employ alternative divisions, such as combining or integrating multiple units or components into another system, or omitting or disabling certain features. Furthermore, any direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection between devices or units, either through an interface, electrical, mechanical, or other means.
[0139] Units described as separate components may or may not be physically separate, and components shown as units may or may not be physical units, that is, they may be located in one place or distributed across multiple network units. Some or all of these units may be selected to achieve the purpose of this embodiment according to actual needs.
[0140] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
[0141] If a function is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, or the portion that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, server, or network device, etc.) to execute all or part of the steps of the various embodiments of the method of the present invention. The aforementioned storage medium includes various media that can store program code, such as USB flash drives, mobile hard drives, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical disks.
[0142] Those skilled in the art will appreciate that all or part of the steps in the above-described method embodiments can be implemented using hardware associated with program instructions. The aforementioned program can be stored in a computer-readable storage medium. When executed, the program performs the steps of the above-described method embodiments. The aforementioned storage medium includes various media capable of storing program code, such as ROM, RAM, magnetic disks, or optical disks.
[0143] Finally, it should be noted that those skilled in the art will readily identify other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses, or adaptations of the present invention that follow the general principles of the present invention and include common knowledge or customary techniques in the art not disclosed herein. The present invention is not limited to the precise structure described above and illustrated in the accompanying drawings, and various modifications and variations may be made without departing from the scope thereof. The scope of the present invention is limited solely by the appended claims.
Claims
1. A liquid leakage monitoring device, characterized in that: It includes a liquid leakage monitoring component and a control module, wherein the liquid leakage monitoring component is connected to the control module; The leakage monitoring assembly includes two stacked first electrode layers and a second electrode layer; The first electrode layer is provided with multiple rows of first electrodes, and the second electrode layer is provided with multiple rows of second electrodes, the multiple rows of first electrodes and the multiple rows of second electrodes are staggered, and any intersecting first electrodes and second electrodes constitute a monitoring point in the monitoring area; The control module is used to drive the first electrode and the second electrode, and obtain capacitance information of the monitoring point; the capacitance information is used to determine whether water has entered the monitoring area.
2. The device according to claim 1, characterized in that The control module includes a driving unit, a sensing unit and a control unit; The control unit is connected to the driving unit and the sensing unit respectively; The driving unit is connected to both ends of the first electrode and both ends of the second electrode; the driving unit is used to drive the first electrode and the second electrode; The sensing unit is connected to both ends of the first electrode and both ends of the second electrode; the sensing unit is used to sample and obtain sensing signals of the first electrode and the second electrode; The control unit is configured to generate capacitance information of the monitoring point based on the sensing signals of the first electrode and the second electrode.
3. The device according to claim 2, characterized in that A driving bus and a sensing bus are also provided on the first electrode layer and the second electrode layer; The driving unit is connected to the first electrode and the second electrode via the driving bus; The sensing unit is connected to the first electrode and the second electrode through the sensing bus.
4. The device according to claim 1, characterized in that The liquid leakage monitoring component is provided with a waterproof structure.
5. The device according to claim 1, characterized in that The first electrodes of the first electrode layer and the second electrodes of the second electrode layer are both geometrically shaped conductive material electrodes and are arranged in an array structure.
6. The device according to claim 1, characterized in that The thickness of the first electrode is smaller than the thickness of the first electrode layer; The thickness of the second electrode is smaller than the thickness of the second electrode layer.
7. The device according to claim 1, characterized in that An isolation layer is provided between the first electrode layer and the second electrode layer.
8. The device according to claim 1, characterized in that The thickness of the first electrode layer and the second electrode layer is less than or equal to a preset value.
9. The device according to claim 1, characterized in that An insulating waterproof layer is provided at the bottom of the liquid leakage monitoring component.
10. A liquid leakage monitoring system, characterized in that: comprising a processing module and a liquid leakage monitoring device according to any one of claims 1 to 9; the liquid leakage monitoring device is connected to the processing module; The leakage monitoring device is arranged in the area to be monitored of the sealing structure of the battery; The processing module is used to determine whether water has entered the area to be monitored based on the capacity information of the monitoring point.
11. The system according to claim 10, wherein: There are multiple leakage monitoring devices; Different leakage monitoring devices are arranged in different areas to be monitored of the sealing structure.
12. The system according to claim 10, wherein: The processing module is further configured to: When it is determined according to the capacity information of the monitoring point that water has entered the area to be monitored, an alarm message is output.
13. The system according to claim 10, wherein: The processing module is further configured to: In the case where water intrusion into the monitored area is determined based on the capacitance information of the monitoring point, the water intrusion position and / or water intrusion time is determined based on the capacitance change corresponding to the monitoring point.
14. The system according to claim 13, wherein: The processing module is further configured to: When water ingress is determined in the monitored area based on the capacitance information of the monitoring point, the amount of water ingress and / or the path of water movement are determined based on the capacitance change corresponding to the monitoring point and the sampling time.
15. A battery management system, characterized in that: The invention comprises the liquid leakage monitoring system according to any one of claims 10 to 14.
16. A battery system, characterized in that: The invention comprises a battery and a battery management system as claimed in claim 15 .
17. An electrical device, characterized in that: A battery system comprising the battery system of claim 16.
18. An electric energy device, characterized in that: A battery system comprising the battery system of claim 16.
19. A method for identifying liquid leakage, characterized in that: include: Obtain the capacitance information of monitoring points within the monitoring area; Determine whether water has entered the area to be monitored based on the capacitance information of the monitoring point.
20. A liquid leakage identification device, characterized in that: include: An acquisition device, used to obtain capacitance information of monitoring points within a monitoring area; The processing device is used to determine whether water has entered the area to be monitored based on the capacity information of the monitoring point.
21. An electronic device, characterized in that: The electronic device includes: a processor, and a memory communicatively connected to the processor; The memory stores computer-executable instructions; The processor executes the computer-executable instructions stored in the memory to implement the method as claimed in claim 19.
22. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer-executable instructions, which are used to implement the method as claimed in claim 19 when executed by a processor.
23. A computer program product, characterized in that The invention comprises a computer program which, when executed by a processor, implements the method as claimed in claim 19.