CN-224202601-U - New energy automobile BMS temperature monitoring parameter acquisition device

CN224202601UCN 224202601 UCN224202601 UCN 224202601UCN-224202601-U

Abstract

The utility model relates to the technical field of new energy automobile battery management systems, in particular to a new energy automobile BMS temperature monitoring parameter acquisition device. The system comprises a compound monitoring unit, a working condition identification unit and a filtering optimization unit. According to the utility model, the composite monitoring unit is used for carrying out multidimensional acquisition on battery temperature data by using the surface contact type temperature sensor, the internal penetrating type temperature sensor and the non-contact type temperature sensor, the working condition identification unit is used for constructing an optimal classification hyperplane by using the support vector machine, classifying characteristic data of different working conditions, judging the current working condition of the battery, dynamically adjusting the size of a filtering window according to the working condition, and carrying out multistage amplification and filtering treatment on the acquired temperature data by the filtering optimization unit through the amplifying and filtering circuit, so that the problem that the traditional single sensor cannot comprehensively reflect the thermal state of the battery is solved, and the integrity and accuracy of the temperature data are improved.

Inventors

Xie Daizhong
ZHU LIPING
HUANG YONGYE
LUO JIANQUAN

Assignees

深圳市则成电子股份有限公司

Dates

Publication Date: 20260505
Application Date: 20250626

Claims (7)

1. The BMS temperature monitoring parameter acquisition device for the new energy automobile is characterized by comprising a compound monitoring unit (100), a working condition identification unit (200) and a filtering optimization unit (300), wherein the compound monitoring unit (100) is connected with the working condition identification unit (200), and the working condition identification unit (200) is connected with the filtering optimization unit (300); The combined type monitoring unit (100) utilizes a surface contact type temperature sensor, an internal penetrating type temperature sensor and a non-contact type temperature sensor to carry out multi-dimensional acquisition on battery temperature data, the working condition identification unit (200) acquires vehicle acceleration, motor current and voltage data, the support vector machine is utilized to classify characteristic data of different working conditions by constructing an optimal classifying hyperplane, the running working condition of the current battery is judged, the size of a filtering window is dynamically adjusted according to the working conditions, and the filtering optimization unit (300) carries out multi-stage amplification and filtering processing on the acquired temperature data through the amplifying and filtering circuit.
2. The device for collecting the temperature monitoring parameters of the BMS of the new energy automobile according to claim 1, wherein the composite monitoring unit (100) is attached to the surface of the battery through a surface contact type temperature sensor to collect data, an internal penetrating type temperature sensor is adopted to obtain the internal temperature of the battery, and a non-contact type temperature sensor is adopted to obtain the overall temperature distribution of the battery.
3. The device for collecting the temperature monitoring parameters of the BMS of the new energy automobile according to claim 1, wherein the working condition identification unit (200) divides the acquired data samples into a training set and a testing set, the training set data is used for training a support vector machine model, and model performance is continuously optimized by adjusting model parameters.
4. The device for collecting the temperature monitoring parameters of the BMS of the new energy automobile according to claim 1, wherein the working condition identification unit (200) adopts a polynomial kernel function to map the nonlinear data in the original low-dimensional space to the high-dimensional space so that the data becomes linearly separable in the high-dimensional space.
5. The BMS temperature monitoring parameter acquisition device for the new energy automobile according to claim 1, wherein the filtering optimization unit (300) comprises an amplifying and filtering circuit, wherein the amplifying and filtering circuit comprises a primary amplifying circuit, a filtering circuit and a diode amplifying circuit, and the primary amplifying circuit comprises a triode Q1; the base of the triode Q1 is connected with one end of a resistor R1 in parallel connection with one end of a resistor R4, the other end of the resistor R1 is connected with the positive electrode of an input voltage UI, the emitting electrode of the triode Q1 is connected with the negative electrode of the input voltage UI, and the collecting electrode of the triode Q1 is connected with one end of a resistor R3 in parallel connection with one end of the resistor R4.
6. The device for collecting the BMS temperature monitoring parameters of the new energy automobile according to claim 1, wherein the filtering optimizing unit (300) comprises a filtering circuit, and the filtering circuit comprises an operational amplifier A; One end of a resistor R6 is connected in parallel with one end of a capacitor C1 by a pin 2 of the operational amplifier A, one end of a resistor R5 is connected with the pin 3 of the operational amplifier A, the other end of the resistor R5 is grounded, and one end of the resistor R6 is connected with the other end of the capacitor C1 by a pin 1 of the operational amplifier A.
7. The device for collecting the temperature monitoring parameters of the BMS of the new energy automobile according to claim 1, wherein the filtering optimizing unit (300) comprises a diode amplifying circuit, and the diode amplifying circuit comprises a triode Q2; The collector of the triode Q2 is connected with one end of a resistor R7 in parallel connection with the positive electrode of the output voltage UO, the resistor R7 in parallel connection with the resistor R2 and the resistor R3 are connected with a power supply VCC, and the emitter of the triode Q2 is connected with the negative electrode of the output voltage UO.

Description

New energy automobile BMS temperature monitoring parameter acquisition device Technical Field The utility model relates to the technical field of new energy automobile battery management systems, in particular to a new energy automobile BMS temperature monitoring parameter acquisition device. Background Under the background of rapid development of new energy automobile industry, a Battery Management System (BMS) is used as a core component for guaranteeing safe and efficient operation of a power battery, and a temperature monitoring function of the battery management system is very important. The performance and the service life of the battery are closely related to the working temperature, the aging of the battery can be accelerated even safety accidents such as thermal runaway are caused when the temperature is too high, and the charge and discharge efficiency of the battery can be reduced when the temperature is too low. Thus, accurate and reliable temperature monitoring is the basis for achieving efficient management of the battery. At present, traditional battery management system adopts single thermistor or thermocouple more, can't satisfy the demand that electric core surface high accuracy temperature measurement, inside temperature monitoring and whole temperature field distribute obtained simultaneously, under the operating mode such as vehicle rapid acceleration, rapid deceleration, vibration and electromagnetic interference can lead to temperature data fluctuation, current filtering algorithm is difficult to real-time self-adaptation adjustment parameter, in order to carry out multistage amplification to temperature parameter, improves temperature monitoring parameter's accuracy, consequently, we propose a new energy automobile BMS temperature monitoring parameter acquisition device. Disclosure of utility model The utility model aims to provide a BMS temperature monitoring parameter acquisition device for a new energy automobile, which aims to solve the problems in the background technology. In order to achieve the above purpose, the utility model provides a new energy automobile BMS temperature monitoring parameter acquisition device, which comprises a compound monitoring unit, a working condition identification unit and a filtering optimization unit, wherein the compound monitoring unit is connected with the working condition identification unit, and the working condition identification unit is connected with the filtering optimization unit; The composite monitoring unit utilizes a surface contact type temperature sensor, an internal penetrating type temperature sensor and a non-contact type temperature sensor to carry out multidimensional acquisition on battery temperature data, the working condition identification unit acquires vehicle acceleration, motor current and voltage data, the support vector machine is utilized to classify characteristic data of different working conditions by constructing an optimal classification hyperplane, the running working condition of the current battery is judged, the size of a filtering window is dynamically adjusted according to the working conditions, and the filtering optimization unit carries out multistage amplification and filtering processing on the acquired temperature data through the amplifying and filtering circuit. Compared with the prior art, the utility model has the beneficial effects that: 1. According to the BMS temperature monitoring parameter acquisition device of the new energy automobile, the surface contact type temperature sensor, the internal penetrating type temperature sensor and the non-contact type temperature sensor are utilized to carry out multi-dimensional acquisition on battery temperature data through the composite type monitoring unit, so that three-dimensional monitoring from a single point on the surface of the battery to a point-line-surface of an integral temperature field from a deep layer in the interior of the battery is realized, the problem that the traditional single sensor cannot comprehensively reflect the thermal state of the battery is solved, the integrity and the accuracy of the temperature data are improved, and a more real temperature basis is provided for the BMS; 2. The working condition identification unit acquires the data of the acceleration, the motor current and the voltage of the vehicle, the support vector machine is utilized, the characteristic data of different working conditions are classified by constructing an optimal classification hyperplane, the running working condition of the current battery is judged, the size of a filtering window is dynamically adjusted according to the working condition, the filtering optimization unit performs multistage amplification and filtering processing on the acquired temperature data through the amplifying and filtering circuit, the signal-to-noise ratio of the temperature data can be obviously improved under the complex working conditions of rapid accelerat