A data calibration system for a lithium battery thickness detection device
By combining dual laser displacement sensors and temperature and humidity sensor compensation circuits, the single-point measurement error and environmental influence problems of lithium battery thickness detection devices are solved, realizing high-precision, non-contact lithium battery thickness detection.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN HENGYI LITHIUM ENERGY TECH CO LTD
- Filing Date
- 2025-10-21
- Publication Date
- 2026-08-04
AI Technical Summary
Existing lithium battery thickness detection devices suffer from large single-point measurement errors, are susceptible to sensor drift and environmental changes, and lack real-time environmental compensation, resulting in low detection accuracy.
Dual laser displacement sensors are used for dual detection, combined with differential amplifier circuit to eliminate system errors, and temperature and humidity sensors and hardware compensation circuit are integrated to detect environmental parameters in real time and perform signal compensation.
It effectively eliminates single-point measurement errors, improves detection accuracy, avoids damage to the lithium battery surface caused by traditional contact measurement, and realizes non-contact high-precision measurement.
Smart Images
Figure CN224593913U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of lithium battery technology, specifically a data calibration system for a lithium battery thickness detection device. Background Technology
[0002] In the manufacturing process of lithium batteries, the thickness of electrodes, cells, and finished batteries is one of the key process parameters, directly affecting the battery's energy density, safety performance, and consistency. Currently, non-contact laser displacement sensors and other thickness detection devices are commonly used in industrial production for online or offline inspection.
[0003] However, existing thickness detection devices and their data processing systems have significant limitations in practical applications: Existing technologies mostly rely on a single sensor for single-point measurement, which cannot effectively identify and eliminate accidental errors caused by the sensor's own instantaneous drift, microscopic undulations on the battery surface, or mechanical vibrations in the field. The accuracy of precision measuring components such as laser displacement sensors is easily affected by changes in temperature and humidity in the production environment, causing the measured values to drift. Most existing systems lack effective real-time environmental compensation functions.
[0004] Therefore, this application proposes a data calibration system for a lithium battery thickness detection device to improve detection accuracy. Utility Model Content
[0005] To address the shortcomings of existing technologies, this application provides a data calibration system for a lithium battery thickness detection device.
[0006] To address the above problems, this application provides the following technical solution: A data calibration system for a lithium battery thickness detection device includes: The first thickness acquisition unit is used for preliminary detection of the thickness of the lithium battery; The second thickness acquisition unit is used to detect the thickness of the lithium battery again; The signal processing circuit includes a differential amplifier circuit and a comparator circuit; the signal output terminal of the first thickness acquisition unit is connected to the non-inverting input terminal of the differential amplifier circuit, the signal output terminal of the second thickness acquisition unit is connected to the inverting input terminal of the differential amplifier circuit, and the signal output terminal of the differential amplifier circuit is connected to the signal input terminal of the comparator circuit. An environmental data acquisition unit is used to detect the temperature and humidity of the surrounding environment. The microcontroller receives data from the first thickness acquisition unit, the second thickness acquisition unit, the signal processing circuit, and the environmental acquisition unit, performs data analysis, and drives the calibration unit to operate. The output terminals of the first and second thickness acquisition units are connected to the signal input terminal of the microcontroller, and the signal output terminal of the comparator circuit is connected to the signal input terminal of the microcontroller. The calibration unit receives the drive signal from the microcontroller and performs calibration; the signal output terminal of the microcontroller is connected to the signal input terminal of the calibration unit. The alarm unit receives the alarm signal from the microcontroller and performs an audible and visual alarm; the signal output terminal of the microcontroller is connected to the signal input terminal of the alarm unit.
[0007] Preferably, the first thickness acquisition unit includes a first laser displacement sensor and a first filtering circuit, and the second thickness acquisition unit includes a second laser displacement sensor and a second filtering circuit.
[0008] Preferably, the comparator circuit includes a first comparator and a second comparator; the signal output terminal of the differential amplifier circuit is connected to the non-inverting input terminal of the first comparator and the inverting input terminal of the second comparator, respectively.
[0009] Preferably, the first comparator is an LM393 and the second comparator is an LM393.
[0010] Preferably, the calibration unit includes a voltage regulator and an adder; the voltage regulator provides a stable reference for the calibration unit; the non-inverting input of the adder is connected to the signal output of the microcontroller to receive the compensation voltage output by the microcontroller; the non-inverting input of the adder is connected to the signal output of the first laser displacement sensor and the second laser displacement sensor to receive the signals from the first laser displacement sensor and the second laser displacement sensor.
[0011] Preferably, the alarm unit includes a buzzer and an LED light.
[0012] Preferably, the environmental acquisition unit detects temperature and humidity using a temperature and humidity sensor; the selected temperature and humidity sensor is model SHT30.
[0013] Compared with the prior art, this application provides a data calibration system for a lithium battery thickness detection device, which has the following advantages: The system employs a first laser displacement sensor and a second laser displacement sensor for dual detection, and eliminates system errors through a differential amplifier circuit, effectively solving the problem of random errors in single-point measurement. Furthermore, the use of laser displacement sensors for measurement enables non-contact measurement, avoiding damage or contamination to the lithium battery surface caused by traditional contact measurement, and meeting the requirements for product integrity in the lithium battery production process.
[0014] This system integrates temperature and humidity sensors with hardware compensation circuits, enabling it to detect environmental parameters in real time and compensate for laser signals through hardware circuits, effectively improving detection accuracy.
[0015] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description
[0016] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram illustrating the principle of this application; Figure 2 This is a circuit diagram of this application.
[0017] Reference numerals in the attached figures: 1 First thickness acquisition unit, 2 Second thickness acquisition unit, 3 Signal processing circuit, 4 Environmental acquisition unit, 5 Microcontroller, 6 Calibration unit, 7 Alarm unit. Detailed Implementation
[0018] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0019] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0020] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0021] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0022] This application provides a new technical solution: a data calibration system for a lithium battery thickness detection device, comprising: a first thickness acquisition unit 1, a second thickness acquisition unit 2, a signal processing circuit 3, an environmental acquisition unit 4, a microcontroller 5, a calibration unit 6, and an alarm unit 7; The first thickness acquisition unit 1 is used for preliminary detection of the thickness of the lithium battery; The second thickness acquisition unit 2 is used to detect the thickness of the lithium battery again; The signal processing circuit 3 includes a differential amplifier circuit U2 and a comparator circuit 310; the signal output terminal of the first thickness acquisition unit 1 is connected to the non-inverting input terminal of the differential amplifier circuit U2, the signal output terminal of the second thickness acquisition unit 2 is connected to the inverting input terminal of the differential amplifier circuit U2, and the signal output terminal of the differential amplifier circuit U2 is connected to the signal input terminal of the comparator circuit 310. Environmental acquisition unit 4 is used to detect the temperature and humidity of the surrounding environment; The microcontroller 5 receives data from the first thickness acquisition unit 1, the second thickness acquisition unit 2, the signal processing circuit 3, and the environmental acquisition unit 4, performs data analysis, and drives the operation of the calibration unit 6; the output terminals of the first thickness acquisition unit 1 and the second thickness acquisition unit 2 are connected to the signal input terminal of the microcontroller 5, and the signal output terminal of the comparator circuit 310 is connected to the signal input terminal of the microcontroller 5. The calibration unit 6 receives the drive signal from the microcontroller 5 and performs calibration; the signal output terminal of the microcontroller 5 is connected to the signal input terminal of the calibration unit 6. The alarm unit 7 receives the alarm signal from the microcontroller 5 and performs an audible and visual alarm; the signal output terminal of the microcontroller 5 is connected to the signal input terminal of the alarm unit 7.
[0023] In this invention, the first thickness acquisition unit 1 includes a first laser displacement sensor H1 and a first filter circuit, and the second thickness acquisition unit 2 includes a second laser displacement sensor H2 and a second filter circuit.
[0024] In a specific embodiment, the first laser displacement sensor H1 is connected to pin -IN of the differential amplifier circuit U2 via the first filter circuit; the first laser displacement sensor H1 is connected to pin PA0 of the microcontroller 5 via the first filter circuit. The second laser displacement sensor H2 is connected to the +IN pin of the differential amplifier circuit U2 via the second filter circuit. The second laser displacement sensor H2 is also connected to PA1 of the microcontroller 5 via the second filter circuit.
[0025] In this invention, the comparator circuit 310 includes a first comparator U3.1 and a second comparator U4.1; the signal output terminal of the differential amplifier circuit U2 is connected to the non-inverting input terminal of the first comparator U3.1 and the inverting input terminal of the second comparator U4.1, respectively.
[0026] The first comparator U3.1 and the second comparator U4.1 are both LM393. Other models can also be used for the first comparator U3.1 and the second comparator U4.1.
[0027] In a specific embodiment, the signal output terminal of the differential amplifier circuit U2 is connected to the non-inverting input terminal of the first comparator U3.1, and the inverting input terminal of the first comparator U3.1 is connected to a positive reference voltage. When the output voltage of the differential amplifier circuit U2 is greater than or equal to the positive reference voltage, the first comparator U3.1 outputs a high level to pin A of the OR gate circuit U5. When the output voltage of the differential amplifier circuit U2 is less than the positive reference voltage, the first comparator U3.1 outputs a low level to pin A of the OR gate circuit U5.
[0028] The signal output terminal of the differential amplifier circuit U2 is connected to the inverting input terminal of the second comparator U4.1, and the non-inverting input terminal of the second comparator U4.1 is connected to a negative reference voltage. When the output voltage of the differential amplifier circuit U2 is less than or equal to the negative reference voltage, the second comparator U4.1 outputs a high level to pin B of the OR gate circuit U5; when the output voltage of the differential amplifier circuit U2 is greater than the negative reference voltage, the second comparator U4.1 outputs a low level to pin B of the OR gate circuit U5. Pin Y of the OR gate circuit U5 is connected to pin PB0 of the microcontroller 5.
[0029] In a specific embodiment, the absolute values of the positive reference voltage and the negative reference voltage are equal, the positive reference voltage can be set to +0.003V, and the negative reference voltage can be set to -0.003V.
[0030] In this invention, the calibration unit 6 includes a voltage regulator U6 and an adder U7.1; the voltage regulator U6 provides a stable reference for the calibration unit; the non-inverting input of the adder U7.1 is connected to the signal output of the microcontroller 5 to receive the compensation voltage output by the microcontroller 5; the non-inverting input of the adder U7.1 is connected to the signal output of the first thickness acquisition unit 1 and the second thickness acquisition unit 2 to receive the signals from the first thickness acquisition unit 1 and the second thickness acquisition unit 2.
[0031] In a specific embodiment, the first laser displacement sensor H1 is connected to pin 3 of adder U7.1 via a first filter circuit, with a 1kΩ resistor R4 connected in series between them; the second laser displacement sensor H2 is connected to pin 3 of adder U7.1 via a second filter circuit, with a 1kΩ resistor R6 connected in series between them; pin PA4 of microcontroller 5 is connected to pin 3 of adder U7.1, with a 1kΩ resistor R3 connected in series between them.
[0032] The reference pin 1 of the voltage regulator is connected to pin 2 of the adder U7.1, and the anode pin 3 of the voltage regulator is grounded with the microcontroller U1.
[0033] In this invention, the alarm unit 7 includes a buzzer 710 and an LED light 720.
[0034] In this invention, the environmental acquisition unit 4 detects temperature and humidity through the temperature and humidity sensor H3. When the temperature and humidity detected by the temperature and humidity sensor H3 are greater than the set threshold, the microcontroller 5 drives the calibration unit 6.
[0035] In a specific embodiment, the SCL pin of the temperature and humidity sensor H3 is connected to the PB8 pin of the microcontroller 5, and the SDA pin of the temperature and humidity sensor H3 is connected to the PB9 pin of the microcontroller 5.
[0036] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0037] Although embodiments of this application have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A data calibration system for a lithium battery thickness detection device, characterized in that, include: The first thickness acquisition unit is used for preliminary detection of the thickness of the lithium battery; The second thickness acquisition unit is used to detect the thickness of the lithium battery again; The signal processing circuit includes a differential amplifier circuit and a comparator circuit; the signal output terminal of the first thickness acquisition unit is connected to the non-inverting input terminal of the differential amplifier circuit, the signal output terminal of the second thickness acquisition unit is connected to the inverting input terminal of the differential amplifier circuit, and the signal output terminal of the differential amplifier circuit is connected to the signal input terminal of the comparator circuit. An environmental data acquisition unit is used to detect the temperature and humidity of the surrounding environment. The microcontroller receives data from the first thickness acquisition unit, the second thickness acquisition unit, the signal processing circuit, and the environmental acquisition unit, performs data analysis, and drives the calibration unit to operate. The output terminals of the first and second thickness acquisition units are connected to the signal input terminal of the microcontroller, and the signal output terminal of the comparator circuit is connected to the signal input terminal of the microcontroller. The calibration unit receives the drive signal from the microcontroller and performs calibration; the signal output terminal of the microcontroller is connected to the signal input terminal of the calibration unit. The alarm unit receives the alarm signal from the microcontroller and performs an audible and visual alarm; the signal output terminal of the microcontroller is connected to the signal input terminal of the alarm unit.
2. The data calibration system for a lithium battery thickness detection device according to claim 1, characterized in that, The first thickness acquisition unit includes a first laser displacement sensor and a first filtering circuit, and the second thickness acquisition unit includes a second laser displacement sensor and a second filtering circuit.
3. The data calibration system for a lithium battery thickness detection device according to claim 1, characterized in that, The comparator circuit includes a first comparator and a second comparator; the signal output terminal of the differential amplifier circuit is connected to the non-inverting input terminal of the first comparator and the inverting input terminal of the second comparator, respectively.
4. The data calibration system for a lithium battery thickness detection device according to claim 3, characterized in that, The first comparator is an LM393, and the second comparator is an LM393.
5. The data calibration system for a lithium battery thickness detection device according to claim 2, characterized in that, The calibration unit includes a voltage regulator and an adder; the voltage regulator provides a stable reference for the calibration unit; the non-inverting input of the adder is connected to the signal output of the microcontroller to receive the compensation voltage output by the microcontroller; the non-inverting input of the adder is connected to the signal output of the first laser displacement sensor and the second laser displacement sensor to receive the signals from the first laser displacement sensor and the second laser displacement sensor.
6. The data calibration system for a lithium battery thickness detection device according to claim 1, characterized in that, The alarm unit includes a buzzer and an LED light.
7. The data calibration system for a lithium battery thickness detection device according to claim 1, characterized in that, The environmental acquisition unit detects temperature and humidity using a temperature and humidity sensor; the selected temperature and humidity sensor is model SHT30.