Novel lithium battery detection controller

Abstract

The utility model discloses a novel lithium battery detection and control device, belongs to the technical field of lithium battery thermal runaway monitoring, and aims to provide the novel lithium battery detection and control device to solve the problem that the existing vehicle lithium battery is lack of thermal runaway early warning. The system comprises a master control module, the master control module is in electric signal connection with a detection module, an acquisition module, a battery state signal output module and an early warning signal output module, the detection module comprises an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit and a flame detection unit, and the acquisition module is in electric signal connection with a vehicle-mounted BMS system. And the main control module is also electrically connected with a power supply module. The utility model is suitable for a novel lithium battery detection controller.

Description

Technical Field

[0001] The utility model belongs to the technical field of lithium battery thermal runaway monitoring, and particularly relates to a new type of lithium battery detector. Background Technique

[0002] Vehicle-mounted lithium batteries are the power batteries of hybrid electric vehicles and electric vehicles, and have characteristics such as high energy density and large capacity. The thermal runaway of vehicle-mounted lithium batteries means that during the charging, discharging and other processes of vehicle-mounted lithium batteries, due to internal short circuits, external short circuits, overcharging, over-discharging, overheating and other factors, the internal temperature of the battery rises rapidly, triggering a chain reaction of a series of exothermic reactions. This chain reaction will further increase the battery temperature, ultimately leading to battery failure, fire or even explosion.

[0003] Existing vehicle-mounted lithium batteries generally lack thermal runaway warning measures, mainly relying on the BMS system to monitor various state parameters of the battery in real time, such as temperature, voltage, current, etc. It can only realize the basic state monitoring of lithium batteries. Even if it detects a sudden change in the parameters of the lithium battery and gives an alarm, since the sudden change in parameters generally occurs after thermal runaway, it does not have the function of early warning of thermal runaway. Content of the Utility Model

[0004] The purpose of the utility model is to provide a new type of lithium battery detector to solve the problem that existing vehicle-mounted lithium batteries lack early warning of thermal runaway.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A new type of lithium battery detector includes a main control module, which is electrically connected to a detection module, a collection module, a battery state signal output module and an early warning signal output module. The detection module includes an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit and a flame detection unit. The collection module includes a lithium battery voltage collection unit and a lithium battery current collection unit. The main control module is also electrically connected to a power supply module.

[0007] Further, the H2 detection unit includes an H2 sensor group combining low and high ranges.

[0008] Further, the CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector.

[0009] Further, the smoke detection unit includes an infrared emitting tube and an infrared receiving tube.

[0010] Further, the temperature detection unit includes a thermosensitive sensor.

[0011] Further, the flame detection unit includes an ultraviolet optical detector.

[0012] Furthermore, the main control module is an MCU micro control unit.

[0013] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present utility model are as follows:

[0014] 1. In the present utility model, it includes a main control module, which is electrically connected to a detection module, a collection module, a battery status signal output module, and an early warning signal output module. The detection module includes an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit, and a flame detection unit. The collection module includes a lithium battery voltage collection unit and a lithium battery current collection unit. The main control module is also electrically connected to a power supply module. Through this setting, the detector is set at the lithium battery to be monitored. The main control module relies on the collection module to receive the lithium battery voltage, current, and surface temperature data transmitted by the in-vehicle BMS system, predicts the battery health status and remaining usage time, evaluates the consistency risk of the battery pack at the same time, and relies on the battery status signal output module to output corresponding information, providing reliable processing suggestions for the inspection, maintenance, and replacement of the battery; the main control module relies on the H2 detection unit, CO detection unit, smoke detection unit, temperature detection unit, and flame detection unit to detect various characteristic quantities of lithium battery thermal runaway in real time, judges the lithium battery thermal runaway state, conducts hierarchical early warning according to the thermal runaway state level, and relies on the early warning signal output module to output the hierarchical early warning signal, realizing the early warning of the lithium battery thermal runaway risk, and effectively solving the problem that the existing vehicle lithium battery lacks early warning of thermal runaway.

[0015] 2. In the present utility model, the H2 detection unit includes an H2 sensor group combining low and high ranges. Through this setting, it can cover both low-concentration and high-concentration hydrogen detection ranges simultaneously to provide a wider and more accurate hydrogen concentration measurement. In the low-concentration range, low-range and high-sensitivity hydrogen sensors, such as electrochemical sensors or optical sensors, are used to accurately detect trace amounts of hydrogen. In the high-concentration range, hydrogen sensors with a higher range, such as thermal conductivity sensors, are used to provide accurate measurements when exceeding the range of the low-concentration sensor. Through the H2 sensor group combining low and high ranges, precise detection of H2 within 300 ppm and 300 - 1000 ppm with an error of 1% can be achieved, ensuring that the main control module can obtain accurate data, thereby accurately judging the thermal runaway state of the lithium battery.

[0016] 3. In the present utility model, the CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector. Through this setting, by using the NDIR infrared absorption detection principle, accurate measurement of CO can be realized, facilitating the main control module to accurately judge the thermal runaway state of the lithium battery.

[0017] 4. In the present utility model, the smoke detection unit includes an infrared transmitting tube and an infrared receiving tube. Through this arrangement, based on the principle of light scattering by smoke, the presence or absence of smoke can be determined. When there is no smoke, the infrared receiving tube cannot receive the infrared light emitted by the infrared transmitting tube. When there is smoke and dust, through the refraction and reflection of light, the infrared receiving tube receives the infrared light and generates an electrical signal, realizing the detection of smoke, which facilitates the main control module to accurately judge the thermal runaway state of the lithium battery.

[0018] 5. In the present utility model, the temperature detection unit includes a thermosensitive sensor. Through this arrangement, by utilizing the characteristic that the resistance of the thermosensitive sensor changes with temperature, the temperature range from -50°C to 500°C can be detected, and the ambient temperature data of the lithium battery can be detected, which facilitates the main control module to accurately judge the thermal runaway state of the lithium battery.

[0019] 6. In the present utility model, the flame detection unit includes an ultraviolet optical detector. Through this arrangement, relying on the ultraviolet phototube, the ultraviolet optical detector utilizes the photoelectric emission effect of metals and the electron multiplication theory to realize the detection of flames, which facilitates the main control module to accurately judge the thermal runaway state of the lithium battery. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings, where:

[0021] Figure 1 is the structural schematic diagram of the present utility model. Detailed Embodiments

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts fall within the scope of protection of the present utility model.

[0024] It should be noted that the reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the present utility model and is a simplified description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0026] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging vertically, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0027] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] A new type of lithium battery detector includes a main control module, and the main control module is electrically connected to a detection module, a collection module, a battery status signal output module and an early warning signal output module. The detection module includes an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit and a flame detection unit. The collection module includes a lithium battery voltage collection unit and a lithium battery current collection unit. The main control module is also electrically connected to a power supply module.

[0029] Further, the H2 detection unit includes an H2 sensor group combining low and high ranges.

[0030] Further, the CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector.

[0031] Further, the smoke detection unit includes an infrared emitting tube and an infrared receiving tube.

[0032] Furthermore, the temperature detection unit includes a thermosensitive sensor.

[0033] Furthermore, the flame detection unit includes an ultraviolet optical detector.

[0034] Furthermore, the main control module is an MCU micro-control unit.

[0035] During the implementation of the present utility model, the detector is set at the lithium battery to be monitored. The main control module relies on the acquisition module to receive the lithium battery voltage, current, and surface temperature data transmitted by the in-vehicle BMS system, predicts the battery health status and remaining usage time, and at the same time evaluates the battery pack consistency risk, and outputs corresponding information relying on the battery status signal output module, providing reliable treatment suggestions for the inspection, maintenance, and replacement of the battery; the main control module relies on the H2 detection unit, CO detection unit, smoke detection unit, temperature detection unit, and flame detection unit to detect various characteristic quantities of the lithium battery thermal runaway in real time, judge the lithium battery thermal runaway state, perform hierarchical early warning according to the thermal runaway state level, and output the hierarchical early warning signal relying on the early warning signal output module, realizing the early warning of the battery thermal runaway risk, effectively solving the problem that the existing vehicle lithium battery lacks early warning of thermal runaway.

[0036] Specifically, the H2 detection unit includes an H2 sensor group combining low and high ranges. Through this setting, it is possible to cover both low-concentration and high-concentration hydrogen detection ranges simultaneously to provide a wider and more accurate hydrogen concentration measurement. In the low-concentration range, a low-range, high-sensitivity hydrogen sensor, such as an electrochemical sensor or an optical sensor, is used to accurately detect trace amounts of hydrogen. In the high-concentration range, a hydrogen sensor with a higher range, such as a thermal conductivity sensor, is used to provide accurate measurements when exceeding the range of the low-concentration sensor. Through the H2 sensor group combining low and high ranges, it is possible to accurately detect H2 within 300 ppm and 300 - 1000 ppm with an error of 1%, ensuring that the main control module can obtain accurate data, thereby accurately judging the thermal runaway state of the lithium battery.

[0037] Specifically, the CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector. Through this setting, using the NDIR infrared absorption detection principle, accurate measurement of CO can be achieved, facilitating the main control module to accurately judge the thermal runaway state of the lithium battery.

[0038] Specifically, the smoke detection unit includes an infrared emitting tube and an infrared receiving tube. Through this setting, using the principle of smoke scattering light, it is possible to judge the presence or absence of smoke. When there is no smoke, the infrared receiving tube cannot receive the infrared light emitted by the infrared emitting tube. When there is smoke and dust, through the refraction and reflection of light, the infrared receiving tube receives the infrared light and generates an electrical signal to achieve the detection of smoke, facilitating the main control module to accurately judge the thermal runaway state of the lithium battery.

[0039] Specifically, the temperature detection unit includes a thermosensitive sensor. With this setting, by utilizing the characteristic that the resistance of the thermosensitive sensor changes with temperature, the temperature range of -50°C to 500°C can be detected, and the ambient temperature data of the lithium battery can be detected, facilitating the main control module to accurately judge the thermal runaway state of the lithium battery.

[0040] Specifically, the flame detection unit includes an ultraviolet optical detector. With this setting, relying on the ultraviolet phototube, the ultraviolet optical detector utilizes the photoelectric emission effect of metals and the electron multiplication theory to achieve the detection of flames, facilitating the main control module to accurately judge the thermal runaway state of the lithium battery.

[0041] Specifically, the main control module is an MCU micro control unit.

[0042] Embodiment 1

[0043] A new type of lithium battery detector includes a main control module, which is electrically connected to a detection module, a collection module, a battery status signal output module, and an early warning signal output module. The detection module includes an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit, and a flame detection unit. The collection module includes a lithium battery voltage collection unit and a lithium battery current collection unit. The main control module is also electrically connected to a power supply module.

[0044] Embodiment 2

[0045] On the basis of Embodiment 1, the H2 detection unit includes an H2 sensor group combining low and high ranges.

[0046] Embodiment 3

[0047] On the basis of the above embodiments, the CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector.

[0048] Embodiment 4

[0049] On the basis of the above embodiments, the smoke detection unit includes an infrared emitting tube and an infrared receiving tube.

[0050] Embodiment 5

[0051] On the basis of the above embodiments, the temperature detection unit includes a thermosensitive sensor.

[0052] Embodiment 6

[0053] On the basis of the above embodiments, the flame detection unit includes an ultraviolet optical detector.

[0054] Embodiment 7

[0055] Based on the above embodiments, the main control module is an MCU micro control unit.

[0056] The above is the embodiment of the present invention. The foregoing are the various preferred embodiments of the present invention. If the preferred implementation manners in the various preferred embodiments are not obviously self - contradictory or premised on a certain preferred implementation manner, the various preferred implementation manners can be arbitrarily superimposed and combined. The embodiments and the specific parameters in the embodiments are only for clearly expressing the verification process of the invention, and are not used to limit the patent protection scope of the present invention. The patent protection scope of the present invention still depends on its claims. Any equivalent structural changes made by using the content of the specification and drawings of the present invention should similarly be included in the protection scope of the present invention.

Claims

1. A new type of lithium battery detector, characterized in that, It includes a main control module, which is electrically connected to a detection module, a collection module, a battery status signal output module, and an early warning signal output module. The detection module includes an H2 detection unit, a CO detection unit, a smoke detection unit, a temperature detection unit, and a flame detection unit. The collection module is electrically connected to an in-vehicle BMS system, and the main control module is also electrically connected to a power supply module.

2. The novel lithium battery detector according to claim 1, characterized in that, The H2 detection unit includes an H2 sensor group combining low and high ranges.

3. A novel lithium battery detector according to claim 1, characterized in that, The CO detection unit includes a MEMS infrared light source and a dual-channel pyroelectric detector.

4. A novel lithium battery detector according to claim 1, characterized in that, The smoke detection unit includes an infrared emitting tube and an infrared receiving tube.

5. A novel lithium battery detector according to claim 1, characterized in that, The temperature detection unit includes a thermosensitive sensor.

6. A novel lithium battery detector according to claim 1, characterized in that, The flame detection unit includes an ultraviolet optical detector.

7. A novel lithium battery detector according to claim 1, characterized in that, The main control module is an MCU micro-control unit.

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