CN218866061U - Lithium battery composite detection early warning intelligent device - Google Patents
Lithium battery composite detection early warning intelligent device Download PDFInfo
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- CN218866061U CN218866061U CN202221005865.3U CN202221005865U CN218866061U CN 218866061 U CN218866061 U CN 218866061U CN 202221005865 U CN202221005865 U CN 202221005865U CN 218866061 U CN218866061 U CN 218866061U
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Abstract
The utility model discloses a lithium cell composite detection early warning intelligent device in advance belongs to lithium cell thermal runaway and detects technical field, and aim at solves that current lithium cell thermal runaway check out test set early warning time is limited, application scope is little, there is the false retrievalTo (3) is described. The system comprises an MCU master control analysis module, wherein the MCU master control analysis module is electrically connected with an early warning signal bus output module, the MCU master control analysis module is also electrically connected with a unit lithium battery strain force detection module, the MCU master control analysis module is also electrically connected with a unit lithium battery CO detection module, and the MCU master control analysis module is also electrically connected with a unit lithium battery H 2 And the early warning signal bus output module is in signal connection with a system management platform. The utility model is suitable for a lithium cell composite detection early warning intelligent device in advance.
Description
Technical Field
The utility model belongs to the technical field of lithium cell thermal runaway detects, concretely relates to lithium cell composite detection early warning intelligent device in advance.
Background
The safety detection of the existing lithium battery generally comprises the steps of monitoring the voltage, the current and the temperature of two electrodes on the lithium battery electrode of a unit, comparing the acquired information, and defaulting the thermal runaway of the lithium battery once the acquired information is suddenly changed, wherein the detection mode is suitable for the detection of the thermal runaway of part of lithium batteries, such as internal short circuit caused by puncture and violent collision of the lithium batteries, and has individuality and particularity; meanwhile, the detection mode has the possibility of false detection, such as short circuit and electric leakage of an electrical connection system between lithium battery units, so that the detection mode does not represent the general characteristics of lithium battery thermal runaway, has particularity, individuality and no universality, and is more difficult to realize trend analysis, trend prejudgment, lithium battery thermal runaway early warning and the like on the lithium battery thermal runaway.
The existing market also has a safety detection mode of the lithium battery, namely, sensors such as smoke detection, temperature detection and flame detection are installed around the environment of the lithium battery, the essence of the safety detection mode is to detect smoke, high temperature and flame generated after the thermal runaway of a lithium battery unit, all detected characteristics are from the characteristics generated after the thermal runaway of the lithium battery, and the early detection and early warning before the thermal runaway of the lithium battery cannot be realized.
Through voltage, electric current and the two poles of the earth temperature on the monitoring unit lithium cell electrode, the sudden change data of detecting unit lithium cell like this to there is following problem in the safety inspection early warning mode of realization lithium electricity:
1. the lithium battery has individuality and particularity, is effective for internal short circuit caused by lithium battery puncture and violent collision, and is not practical for other lithium electric heating out-of-control conditions.
2. The method has the possibility of false detection, for example, voltage, current and bipolar temperature sudden changes caused by short circuit, electric leakage and the like of an electrical connection system between lithium battery units cannot be effectively identified and eliminated.
3. The system does not have the function of early warning and generally occurs in thermal runaway.
4. The method does not have the universal characteristic of detecting various thermal runaway of the lithium battery.
By monitoring smoke, high temperature, flame and the like generated after the lithium battery unit is out of control thermally around the lithium battery environment of the unit, the following problems exist in the safety detection mode:
1. the characteristics of smoke, high temperature, flame and the like are all from the characteristics generated after the thermal runaway of the lithium battery, and the advanced detection and early warning before the thermal runaway of the lithium battery cannot be realized.
2. The sensor is installed in lithium cell next door space, and detection sensor has certain detection distance with lithium cell, and the real-time is relatively poor, simultaneously because the interference influence of environment, has the false retrieval nature.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a: the utility model provides a lithium battery composite detection early warning intelligent device in advance, solves the problem that current lithium battery thermal runaway check detecting equipment early warning time is limited, application scope is little, have the false retrieval.
The utility model adopts the technical scheme as follows:
the intelligent early warning device for composite detection of lithium battery comprises an MCU (microprogrammed control unit) master control analysis module, wherein the MCU master control analysis module is electrically connected with an early warning signal bus output module, and the MCU master control analysis module is also electrically connected with a unit lithium batteryThe system comprises a strain force detection module, an MCU master control analysis module, a unit lithium battery CO detection module, an MCU lithium battery H detection module and an MCU master control analysis module 2 And the early warning signal bus output module is in signal connection with a system management platform.
Furthermore, the unit lithium battery strain force detection module comprises a unit lithium battery strain gauge adhered to the surface of the unit lithium battery, the unit lithium battery strain gauge is electrically connected with a constant current power supply, the unit lithium battery strain gauge is electrically connected with an A/D sampling circuit, and the A/D sampling circuit is electrically connected with the MCU master control analysis module.
Furthermore, the working temperature range of the unit lithium battery strain gauge is-40 ℃ to 220 ℃.
Further, the unit lithium battery strain gauge is a resistance strain gauge.
Further, the early warning signal bus output module comprises an SPI interface, a CAN bus interface, an RS422 bus interface and an RS485 bus interface.
Further, the unit lithium battery CO detection module is a CO gas detector, and the unit lithium battery H is a unit lithium battery 2 The detection module is H 2 A gas detector.
To sum up, owing to adopted above-mentioned technical scheme, the beneficial effects of the utility model are that:
1. in the utility model, a unit lithium battery strain gauge as thin as paper is pasted on a unit lithium battery shell (hard pack or soft pack) to continuously detect the deformation parameters of the unit lithium battery shell in all weather, the unit lithium battery strain gauge presents different resistance values along with the stress change, the constant current power supply is applied and the sampling is carried out by an A/D sampling circuit, and the sampling value is transmitted to an MCU master control analysis module; CO gas detector and H 2 Gas detector respectively detects characteristic gases CO and H released by thermal runaway of unit lithium battery 2 CO gas detector and H 2 The gas detector transmits the detected gas data signals to the MCU master control analysis module, and the MCU master control analysis module acquires the gas data signals according to the output of the A/D sampling circuitSample and CO gas detector, H 2 The gas data signal comprehensive analysis that the gas detector exported and judge the unit lithium cell thermal runaway situation in advance, and then early warning signal bus output module warns this unit lithium cell health status in advance to system management platform in advance to through changing early warning trouble unit lithium cell in advance, reach the safety protection of lithium cell.
2. The utility model discloses in, MCU master control analysis module exports four kinds of bus interfaces respectively through early warning signal bus output module with the result of analysis early warning in advance: SPI interface, CAN bus interface, RS422 bus interface, RS485 bus interface, communication protocol open for the corresponding system management platform of user access, then be convenient for the user to carry out various early warning according to early warning result application system management platform and deal with: such as power input and output cut-off, acousto-optic prompt early warning and replacement of the lithium battery of the early warning unit.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and that for those skilled in the art, other relevant drawings can be obtained according to the drawings without inventive effort, wherein:
FIG. 1 is a block diagram of the overall structure of the present invention;
fig. 2 is an overall schematic block diagram of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
It should be noted that: reference numerals and letters designate similar items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; mechanical connection or electrical connection can be realized; the two original pieces can be directly connected or indirectly connected through an intermediate medium, or the interiors of the two original pieces are communicated. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The utility model provides a lithium cell composite detection intelligent device that gives early warning in advance, includes MCU master control analysis module, MCU master control analysis module electric signal connection has early warning signal bus output module, MCU master control analysis module still electric signal connection has unit lithium cell strain force detection module, MCU master control analysis module still electric signal connection has unit lithium cell CO detection module, MCU master control analysis module still electric signal connection has unit lithium cell H 2 And the early warning signal bus output module is in signal connection with a system management platform.
Furthermore, the unit lithium battery strain force detection module comprises a unit lithium battery strain gauge adhered to the surface of the unit lithium battery, the unit lithium battery strain gauge is electrically connected with a constant current power supply, the unit lithium battery strain gauge is electrically connected with an A/D sampling circuit, and the A/D sampling circuit is electrically connected with the MCU master control analysis module.
Furthermore, the working temperature range of the unit lithium battery strain gauge is-40 ℃ to 220 ℃.
Further, the unit lithium battery strain gauge is a resistance strain gauge.
Further, the early warning signal bus output module comprises an SPI interface, a CAN bus interface, an RS422 bus interface and an RS485 bus interface.
Furthermore, the unit lithium battery CO detection module is a CO gas detector, and the unit lithium battery H is a unit lithium battery 2 The detection module is H 2 A gas detector.
The utility model discloses in the implementation, because no matter be lithium iron phosphate, ternary lithium, lithium manganate and other lithium cells, all exist with the free form of lithium cell. In order to use and take safety consideration, the single lithium battery can be packaged (such as soft package or hard package), and meanwhile, the pressure valve can be designed, so that the packaging and safety guarantee measures can make the thermal runaway of the lithium battery more difficult on one hand, and on the other hand, the thermal runaway of the lithium battery must be ensuredThe method is a process of quality change caused by quantitative change, and researches and analysis find that the mechanism causes the biggest commonality of lithium battery thermal runaway: no matter the single lithium battery is soft-packaged or hard-packaged, the external packaging of the single lithium battery has a deformation process which breaks through a pressure valve before thermal runaway. However, with the development of time and repeated charge and discharge, the unit lithium battery has the possibility of aging failure, once the pressure valve fails, the thermal runaway is easily caused, but the thermal runaway of all lithium batteries has another commonality: release of CO and H 2 When the gas pressure valve fails, the gas can be gradually released, particularly, the gas such as CO is colorless, tasteless and toxic, the H2 accounts for more than a certain volume in the air and is easy to cause explosion, so that the additional detection of thermal runaway caused by the gas leakage is also necessary. In the working process of the unit lithium battery, the inside of the unit lithium battery can generate chemical electrolyte reaction, when the inside of the unit lithium battery has a tendency of thermal runaway, pressure can be gradually released, because of a shell (a hard bag or a soft bag) and a pressure valve, the thermal runaway can not occur at once, and in the time, a unit lithium battery shell (the hard bag or the soft bag) can generate very small deformation which is in direct proportion to the tendency of the internal thermal runaway, so that according to the general commonality of the thermal runaway of the lithium battery, a unit lithium battery strain gauge as thin as paper is pasted on the unit lithium battery shell (the hard bag or the soft bag) to continuously detect the deformation parameters of the unit lithium battery shell in all weather, the unit lithium battery strain gauge presents different resistance values along with the stress change, the constant current power supply is applied, the sampling is carried out through the A/D sampling circuit, and the sampling value is transmitted to the MCU analysis module; meanwhile, when the unit lithium battery is developed along with time and repeatedly charged and discharged, the unit lithium battery has the possibility of aging failure, the pressure valve fails or breaks down, gases such as CO and H2 are released, and the gases pass through the CO gas sensor and the H gas sensor 2 The gas sensor detects the released CO and H 2 Gas, CO gas detector and H 2 The gas detector transmits the detected gas data signals to the MCU master control analysis module, and the MCU master control analysis module outputs the sampling values according to the A/D sampling circuit, the CO gas detector and the H gas detector 2 Gas output from gas detectorThe volume data signal is combined with big data modeling, analysis and database comparison, so that the thermal runaway condition of the unit lithium battery is analyzed and pre-judged, the health condition of the unit lithium battery is warned to a system management platform in advance through an early warning signal bus output module, the lithium battery can be realized day by day, week by week or even month in advance, and the safety protection of the lithium battery is realized by replacing the early warning fault unit lithium battery in advance.
The MCU master control analysis module respectively outputs four bus interfaces through the early warning signal bus output module according to the analysis and early warning results: SPI interface, CAN bus interface, RS422 bus interface, RS485 bus interface, communication protocol open for the corresponding system management platform of user access, because early warning time is longer (several days, several weeks even several months), the user of then being convenient for carries out various early warnings according to early warning result application system management platform and deals with: such as power input and output cut-off, acousto-optic prompt early warning and replacement of the lithium battery of the early warning unit. Meanwhile, the system management platform can also collect detected data, then perform big data analysis, modeling and machine learning, and optimize the early warning precision of the MCU master control analysis module.
The working temperature range of the unit lithium battery strain gauge is wider and is-40-220 ℃, and the unit lithium battery strain gauge can be perfectly suitable for the high-temperature environment detection of lithium battery thermal runaway.
Example 1
The utility model provides a lithium cell composite detection early warning intelligent device in advance, includes MCU master control analysis module, MCU master control analysis module electric signal connection has early warning signal bus output module in advance, MCU master control analysis module still electric signal connection has unit lithium cell strain force detection module, MCU master control analysis module still electric signal connection has unit lithium cell CO detection module, MCU master control analysis module still electric signal connection has unit lithium cell H 2 And the early warning signal bus output module is in signal connection with a system management platform.
Example 2
On the basis of embodiment 1, unit lithium cell strain capacity detection module is including pasting the unit lithium cell foil gage on unit lithium cell surface, unit lithium cell foil gage electricity is connected with constant current power supply, unit lithium cell foil gage electricity signal connection has AD sampling circuit, AD sampling circuit and MCU master control analysis module electricity signal connection.
Example 3
On the basis of the embodiment, the working temperature range of the unit lithium battery strain gauge is-40-220 ℃.
Example 4
On the basis of the embodiment, the unit lithium battery strain gauge is a resistance strain gauge.
Example 5
On the basis of the above embodiment, the early warning signal bus output module includes an SPI interface, a CAN bus interface, an RS422 bus interface, and an RS485 bus interface.
Example 6
On the basis of the embodiment, the CO detection module of the unit lithium battery is a CO gas detector, and the unit lithium battery H is a lithium battery 2 The detection module is H 2 A gas detector.
The embodiments of the present invention are described above. The foregoing is the preferred embodiments of the present invention, and if they are not obviously contradictory or are not assumed to be obvious, all the preferred embodiments can be combined and used by any superposition, and the specific parameters in the embodiments are only for clearly representing the verification process of the present invention, and are not used to limit the patent protection scope of the present invention, which is still subject to the claims, and all the equivalent structural changes made by applying the contents of the specification and the drawings of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a lithium cell composite detection intelligent device that warns in advance which characterized in that, includes MCU master control analysis module, MCU master control analysis module electric signal connection has early warning signal bus output module in advance, MCU master control analysis module is still electric signal connection has early warning signal bus output moduleThe unit lithium battery strain force detection module is characterized in that the MCU master control analysis module is electrically connected with the unit lithium battery CO detection module, and the MCU master control analysis module is electrically connected with the unit lithium battery H 2 The early warning signal bus output module is in signal connection with a system management platform; the unit lithium battery strain force detection module comprises a unit lithium battery strain gauge adhered to the surface of a unit lithium battery, the unit lithium battery strain gauge is electrically connected with a constant current power supply, the unit lithium battery strain gauge is electrically connected with an A/D sampling circuit, and the A/D sampling circuit is electrically connected with an MCU master control analysis module.
2. The intelligent device for early warning of composite detection of lithium batteries according to claim 1, wherein the working temperature range of the strain gauge of the unit lithium battery is-40 ℃ to 220 ℃.
3. The intelligent device for early warning in composite detection of lithium batteries according to claim 1 or 2, wherein the strain gauge of the unit lithium battery is a resistance strain gauge.
4. The intelligent early warning device for composite detection of lithium batteries according to claim 1, wherein the early warning signal bus output module comprises an SPI interface, a CAN bus interface, an RS422 bus interface, and an RS485 bus interface.
5. The intelligent device for early warning of composite detection of lithium battery as claimed in claim 1, wherein the CO detection module of the unit lithium battery is a CO gas detector, and the unit lithium battery H is a CO gas detector 2 The detection module is H 2 A gas detector.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239264A (en) * | 2023-11-15 | 2023-12-15 | 深圳市百酷新能源有限公司 | Battery safety control method and device, intelligent battery and medium |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117239264A (en) * | 2023-11-15 | 2023-12-15 | 深圳市百酷新能源有限公司 | Battery safety control method and device, intelligent battery and medium |
| CN117239264B (en) * | 2023-11-15 | 2024-01-26 | 深圳市百酷新能源有限公司 | Battery safety control method and device, intelligent battery and medium |
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