TBOX capable of detecting state of storage battery of electric vehicle

Abstract

The utility model discloses a TBOX capable of detecting the state of a storage battery of an electric automobile. The TBOX comprises a single battery voltage acquisition module, a battery pack total voltage acquisition module, a current acquisition module, a battery temperature acquisition module and a data communication module. According to the utility model, the storage battery state monitoring function is integrated into the TBOX, so that the state of the storage battery of the electric automobile can be accurately and reliably monitored in real time; a technical basis is provided for realizing accurate evaluation, remote monitoring and management, fault diagnosis and early warning and data analysis of the storage battery of the electric vehicle; the method not only can help a vehicle owner to solve the battery problem, but also can provide data for manufacturers to improve and optimize product performance, and has important significance for improving the reliability, safety and user satisfaction of the electric vehicle.

Description

Technical Field

[0001] The utility model relates to the field of automobile parts, in particular to a TBOX capable of detecting the state of an electric vehicle battery. Background Art

[0002] As a representative of clean energy transportation, electric vehicles are favored by more and more consumers. However, the monitoring and management of the battery status of electric vehicles has always been an important challenge. The performance and life of the battery are crucial to the operation and reliability of electric vehicles. On the other hand, TBOX has functions such as vehicle tracking and positioning, driving data collection and analysis, vehicle fault diagnosis, remote vehicle control, and data communication and remote management, providing comprehensive support and convenience for vehicle management and operation. Based on this, it is considered to integrate the battery status detection and monitoring function into TBOX. Utility Model Content

[0003] In order to timely detect and monitor the storage battery of an electric vehicle, the utility model provides a TBOX capable of detecting the state of the storage battery of the electric vehicle.

[0004] The technical solution of the utility model is as follows: a TBOX capable of detecting the battery status of an electric vehicle, comprising: a single cell voltage acquisition module for acquiring the voltage of each single cell of the electric vehicle battery; a battery pack total voltage acquisition module for acquiring the total voltage of the electric vehicle battery pack; a current acquisition module for acquiring the current of the electric vehicle battery pack; a battery temperature acquisition module for acquiring temperature data of the electric vehicle battery pack; and a data communication module for data communication between the TBOX and a cloud server.

[0005] Preferably, the single cell voltage acquisition module comprises a voltage divider circuit, a voltage follower circuit and a voltage limiting protection circuit which are electrically connected in sequence.

[0006] Preferably, the battery pack total voltage acquisition module has two groups of resistor voltage divider networks, which are electrically connected to the positive electrode and the negative electrode of the battery respectively, and are used to simultaneously acquire the maximum voltage and the minimum voltage of the battery.

[0007] Preferably, the current acquisition module includes a Hall current sensor, a voltage offset circuit and a voltage follower which are electrically connected in sequence.

[0008] Preferably, the battery temperature acquisition module includes a voltage divider circuit, a thermistor and a voltage acquisition circuit.

[0009] The utility model has the following beneficial effects: the utility model integrates the battery status monitoring function into the TBOX, which can accurately and reliably monitor the battery status of electric vehicles in real time; it provides a technical basis for realizing accurate evaluation, remote monitoring and management, fault diagnosis and early warning, and data analysis of electric vehicle batteries; it can not only help car owners solve battery problems, but also provide manufacturers with data for improving and optimizing product performance, which is of great significance to improving the reliability, safety and user satisfaction of electric vehicles. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a system block diagram of the utility model.

[0011] Figure 2 It is a circuit diagram of a single cell voltage acquisition module in the utility model.

[0012] Figure 3 It is a circuit diagram of a battery pack total voltage acquisition module in the utility model.

[0013] Figure 4 It is a circuit diagram of the current acquisition module in the utility model.

[0014] Figure 5 It is a circuit diagram of the battery temperature acquisition module in the utility model.

[0015] Single cell voltage acquisition module 1; battery pack total voltage acquisition module 2; current acquisition module 3; battery temperature acquisition module 4; data communication module 5. DETAILED DESCRIPTION

[0016] The utility model is further described below in conjunction with the embodiments and drawings.

[0017] In the embodiment, Figures 1 to 5 As shown, a TBOX capable of detecting the battery status of an electric vehicle comprises: a single cell voltage acquisition module 1 for acquiring the voltage of each single cell of the electric vehicle battery; a battery pack total voltage acquisition module 2 for acquiring the total voltage of the electric vehicle battery pack; a current acquisition module 3 for acquiring the current of the electric vehicle battery pack; a battery temperature acquisition module 4 for acquiring the temperature data of the electric vehicle battery pack; and a data communication module 5 for data communication between the TBOX and the cloud server. This embodiment integrates the battery status monitoring function into the TBOX, which can accurately and reliably monitor the battery status of the electric vehicle in real time; provides a technical basis for realizing accurate evaluation, remote monitoring and management, fault diagnosis and early warning, and data analysis of electric vehicle batteries; can not only help car owners solve battery problems, but also provide data for manufacturers to improve and optimize product performance, which is of great significance to improving the reliability, safety, and user satisfaction of electric vehicles.

[0018] In the embodiment, Figure 2 As shown, the single cell voltage acquisition module 1 includes a voltage divider circuit, a voltage follower circuit and a voltage limiting protection circuit which are electrically connected in sequence. The actual battery voltage of the battery can reach 15V, so this embodiment uses precision resistors to set up a voltage divider circuit, and the voltage after the resistor voltage divider is sent to the voltage follower circuit composed of an operational amplifier. After the voltage passes through the operational amplifier, a diode is used to protect the output end, so that the output voltage is not greater than the safety setting value, ensuring accurate detection and preventing damage to the single-chip microcomputer chip and other measuring components.

[0019] In the embodiment, Figure 3 As shown, the battery pack total voltage acquisition module 2 has two groups of resistor voltage-dividing networks, which are electrically connected to the positive and negative poles of the battery, respectively, for simultaneously acquiring the highest voltage and the lowest voltage of the battery. In this embodiment, the voltage of the battery pack is divided into two parts, which are connected to the following measurement circuit through two groups of voltage-dividing resistors, and the total voltage of the battery pack can be calculated by measuring the potential difference between the highest voltage and the lowest voltage. This module only needs to use a few simple resistors to construct the voltage-dividing network, so the circuit structure is relatively simple, easy to design and implement, and at the same time, the resistor voltage-dividing method does not rely on complex electronic components, so it has high reliability. By simultaneously acquiring the highest voltage and the lowest voltage of the battery pack, and then calculating the potential difference between the two, the total voltage of the battery pack can be obtained in real time, which is very important for real-time monitoring and management of the battery state, and helps to ensure the safety and performance of the battery pack. By reasonably selecting the resistance value of the voltage-dividing resistor, the accuracy of the voltage measurement can be made to a high level as much as possible under the premise of ensuring the measurement range. The resistor voltage-dividing method can better overcome the precision limitation of the measuring instrument and improve the accuracy of the total voltage measurement.

[0020] In the embodiment, Figure 4 As shown, the current acquisition module 3 includes a Hall current sensor, a voltage offset circuit and a voltage follower which are electrically connected in sequence. The Hall current sensor is placed on the path where the current flows in the circuit, and the magnitude of the current is calculated by measuring the voltage drop across the Hall element. The voltage offset circuit uses an operational amplifier to offset the output voltage of the Hall current sensor to a voltage range suitable for the input range of the ADC (analog-to-digital converter). The voltage follower is configured to connect the offset output voltage to the ADC or other circuits. The function of the voltage follower is to maintain the consistency between the input voltage and the output voltage to provide accurate current measurement results. The TL072 operational amplifier selected in this embodiment is a dual op amp chip, which consists of two independent op amps. In the current acquisition module 3, one TL072 is used as a voltage offset circuit and the other is used as a voltage follower.

[0021] In the embodiment, Figure 5As shown, the battery temperature acquisition module 4 includes a voltage divider circuit, a thermistor and a voltage acquisition circuit. This embodiment uses a PT1000 patch platinum thermistor temperature sensor for temperature measurement, collects the voltage across the PT1000 through a voltage acquisition circuit, and converts it through a temperature resistance table to obtain the current battery temperature. The voltage acquisition circuit is used to measure the voltage across the PT1000, which can be achieved through an analog input pin or an analog-to-digital converter.

[0022] In the embodiment, the data communication module 5 plays an important role in data communication with the cloud server in the TBOX. Different communication technologies can be used to establish a connection with the cloud server and transmit the collected vehicle and battery related data. Usually, the data communication module supports multiple communication methods, such as GPRS, 3G / 4G, Wi-Fi, Bluetooth, Ethernet, etc. These communication methods can be selected according to different application scenarios and requirements. The data communication module 5 can realize operations such as data upload, data download, obtaining instructions issued from the cloud server, software update, remote control and operation.

[0023] Obviously, the above embodiments of the present invention are only examples for explaining the present invention, and are not intended to limit the implementation methods of the present invention. Other obvious changes or modifications derived from the essence of the present invention still fall within the protection scope of the present invention.

Claims

1. A TBOX capable of detecting the battery status of an electric vehicle, characterized in that: include: A single cell voltage acquisition module (1) is used to acquire the voltage of each single cell of the electric vehicle battery; A battery pack total voltage acquisition module (2), used to acquire the total voltage of the battery pack of the electric vehicle; A current acquisition module (3), used to acquire the current of the battery pack of the electric vehicle; A battery temperature acquisition module (4), used to acquire temperature data of a battery pack of an electric vehicle; The data communication module (5) is used for data communication between the TBOX and the cloud server.

2. The TBOX capable of detecting the battery status of an electric vehicle according to claim 1, characterized in that: The single cell voltage acquisition module (1) comprises a voltage dividing circuit, a voltage following circuit and a voltage limiting protection circuit which are electrically connected in sequence.

3. The TBOX capable of detecting the battery status of an electric vehicle according to claim 1, characterized in that: The battery pack total voltage acquisition module (2) has two groups of resistor voltage divider networks, which are electrically connected to the positive electrode and the negative electrode of the battery respectively, and are used to simultaneously acquire the maximum voltage and the minimum voltage of the battery.

4. The TBOX capable of detecting the battery status of an electric vehicle according to claim 1, characterized in that: The current acquisition module (3) comprises a Hall current sensor, a voltage offset circuit and a voltage follower which are electrically connected in sequence.

5. The TBOX capable of detecting the battery status of an electric vehicle according to claim 1, characterized in that: The battery temperature acquisition module (4) comprises a voltage divider circuit, a thermistor and a voltage acquisition circuit.

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