CN210514558U - Electric automobile power battery information monitoring devices - Google Patents
Electric automobile power battery information monitoring devices Download PDFInfo
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- CN210514558U CN210514558U CN201921125547.9U CN201921125547U CN210514558U CN 210514558 U CN210514558 U CN 210514558U CN 201921125547 U CN201921125547 U CN 201921125547U CN 210514558 U CN210514558 U CN 210514558U
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Abstract
The utility model relates to an electric automobile power battery information monitoring device, which comprises a singlechip main circuit, a detection circuit connected with the singlechip main circuit, a serial port communication circuit and a system power supply circuit; the detection circuit comprises a voltage detection circuit, a current detection circuit and a temperature detection circuit; the voltage detection circuit detects the voltage of two ends of the power battery in a voltage division mode, the operational amplifier LM2904 carries out impedance matching, and the current of the voltage detection circuit is limited through the resistor R3; the current detection circuit is provided with a current Hall sensor, and the current of the voltage detection circuit is limited through a resistor R11; the temperature detection circuit is provided with a thermistor RT MF52, an operational amplifier LM2904 is used for impedance matching, and the current of the voltage detection circuit is limited through R3; the system power supply circuit is provided with a K78L05-500R3 chip for converting the voltage of the power battery into 5V and 3.3V, and the power supply inlet of the power battery is connected with a fuse and filter capacitors C23 and C24.
Description
Technical Field
The utility model relates to a new energy automobile electron field especially relates to an electric automobile power battery information monitoring devices.
Background
The electric automobile has the advantages of no emission pollution, low noise, easy operation, easy maintenance, low operation cost and the like, and has incomparable advantages on environmental protection and energy conservation. The power battery is not only a technical bottleneck restricting the scale development of the electric vehicle, but also a key factor that the price of the electric vehicle is high, and therefore, the power battery becomes a hot spot for research on automobile electronics. As a power source of an electric vehicle, monitoring a Battery state in real time, performing data transmission, and effectively managing a Battery pack are key problems in the research of a Battery Management System (BMS). However, most of the data acquisition units in the BMS system in the current market adopt wired data transmission, and the problems of poor adaptability, complicated wiring, unchanged maintenance and the like seriously affect the later maintenance, replacement and upgrading of the battery. The electric automobile can be developed more rapidly only on the two premises of solving the problems of good manufacturing technology and industrial wireless network technology. Research shows that the reliability of the battery monitoring system is related to the transmission mode and network selection.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide an electric automobile power battery information monitoring devices, solve the problem among the prior art.
In order to achieve the above object, the present invention provides a technical solution:
an information monitoring device for a power battery of an electric automobile comprises a singlechip main circuit, a detection circuit connected with the singlechip main circuit, a serial communication circuit and a system power supply circuit; the detection circuit comprises a voltage detection circuit, a current detection circuit and a temperature detection circuit; the voltage detection circuit detects the voltage of two ends of the power battery in a voltage division mode, is provided with an operational amplifier LM2904 for impedance matching, and limits the current of the voltage detection circuit through a resistor R3; the current detection circuit is provided with a current Hall sensor for detecting the current of the power battery, and the current of the voltage detection circuit is limited through a resistor R11; the temperature detection circuit is provided with a thermistor RT MF52 for detecting the working temperature of the power battery, is provided with an operational amplifier LM2904 for impedance matching, and is used for limiting the current of the voltage detection circuit through R3; the system power supply circuit adopts a K78L05-500R3 chip to convert the voltage of the power battery into 5V and 3.3V voltage to provide power for the singlechip, and the power supply inlet of the power battery is connected with a fuse and filter capacitors C23 and C24.
The utility model discloses owing to take above technical scheme, it has following advantage:
the utility model adopts the terminal module to collect the single batteries in a distributed way, so that the breakdown of the whole monitoring system caused by a certain line fault can be avoided; the wireless communication mode can overcome the problems of poor adaptability of wired data transmission, complex wiring, inconvenient maintenance and the like in the battery management system; the single-chip microcomputer detection circuit realizes real-time monitoring of the voltage, the current and the temperature of the battery and provides reliable data reference for operations such as SOC estimation and equalization strategies in the battery management system; through simulation and experimental verification, the battery monitoring system is a novel data acquisition system at present, and has good practical value and application prospect.
Drawings
Fig. 1 is a circuit diagram of the single chip microcomputer control circuit of the present invention;
fig. 2 is a circuit diagram of the voltage detection circuit of the present invention;
fig. 3 is a circuit diagram of the current detection circuit of the present invention;
fig. 4 is a circuit diagram of the temperature detection circuit of the present invention;
fig. 5 is a circuit diagram of the 5V power supply circuit of the present invention;
fig. 6 is a circuit diagram of the 3.3V power supply circuit of the present invention;
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings. Wherein like elements in different embodiments are numbered with like associated elements. In the following description, numerous details are set forth in order to provide a better understanding of the present application. However, those skilled in the art will readily recognize that some of the features may be omitted or replaced with other elements, materials, methods in different instances.
The invention designs an information monitoring device for a power battery of an electric automobile, which considers that the voltages of all single lead-acid batteries are different, and adopts wide voltage (5-20V) input. The battery monitoring system is an electronic circuit for a battery data acquisition part in a battery management system, and consists of an acquisition module and a transmission module, a star network is established by adopting Zigbee, the voltage, the current and the temperature of a single battery are detected by a terminal module and are sent to a coordinator module, and data transmission is reliable and stable. And after receiving the data, the coordinator transmits the data to an upper computer through RS232 for real-time monitoring.
The technical solution of the present invention is further explained with reference to fig. 1 to 6 below:
as shown in fig. 1, the electric vehicle power battery information monitoring device mainly samples voltage, current and temperature data of a power battery in real time through a sensor, and sends the voltage, current and temperature data to an upper computer in real time for on-site visual reading so as to make adjustment at any time; the information monitoring device for the power battery of the electric automobile comprises a single chip microcomputer main circuit, a detection circuit (including voltage detection, current detection and temperature detection), a serial communication circuit and a system power supply circuit.
As shown in fig. 2, the voltage detection circuit detects the voltage across the battery by voltage division, and performs impedance matching by LM2904, and limits the sensor output current by R3 (100R).
As shown in fig. 3, the current detection circuit detects a current by the current hall sensor, and limits the sensor output current by the resistor R11 (100R).
As shown in fig. 4, the temperature detection circuit detects the temperature of the battery during operation by means of an RT MF52 thermistor, and performs impedance matching by means of LM2904, thereby limiting the sensor output current by means of R3 (100R).
As shown in fig. 5: the power supply circuit adopts a K78L05-500R3 chip to convert the battery voltage into 5V and 3.3V to provide power for the singlechip, a fuse is connected in series to prevent a short circuit or an overlarge current from burning the device, and the output voltage is filtered by a capacitor.
The battery power supply inlet is connected with a fuse F1 and filter capacitors C23 and C24 when viewed from the battery end, the fuse plays a role of line input current overcurrent protection, and the filter capacitors C23 and C24 are used for restraining high-frequency spike signals from the battery to protect the safety of an input line.
Voltage sampling adopts voltage division type, output voltage VBAT, and voltage signal input to the port of the single chip microcomputer
The current detection circuit adopts a Hall current sensor to collect current iCurrentC × 0.031845-131.11255, the collection range is-50A- + 50A;
the maximum resistance value of the mf52 thermistor in the temperature detection circuit is 10K, but the circuit works in the range of-20 ℃ to 80 ℃,
for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.
Claims (1)
1. The utility model provides an electric automobile power battery information monitoring devices which characterized in that: the system comprises a singlechip main circuit, a detection circuit connected with the singlechip main circuit, a serial port communication circuit and a system power supply circuit; the detection circuit comprises a voltage detection circuit, a current detection circuit and a temperature detection circuit; the voltage detection circuit detects the voltage of two ends of the power battery in a voltage division mode, is provided with an operational amplifier LM2904 for impedance matching, and limits the current of the voltage detection circuit through a resistor R3; the current detection circuit is provided with a current Hall sensor for detecting the current of the power battery, and the current of the voltage detection circuit is limited through a resistor R11; the temperature detection circuit is provided with a thermistor RT MF52 for detecting the working temperature of the power battery, is provided with an operational amplifier LM2904 for impedance matching, and is used for limiting the current of the voltage detection circuit through R3; the system power supply circuit adopts a K78L05-500R3 chip to convert the voltage of the power battery into 5V and 3.3V voltage to provide power for the singlechip, and the power supply inlet of the power battery is connected with a fuse and filter capacitors C23 and C24.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921125547.9U CN210514558U (en) | 2019-07-17 | 2019-07-17 | Electric automobile power battery information monitoring devices |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921125547.9U CN210514558U (en) | 2019-07-17 | 2019-07-17 | Electric automobile power battery information monitoring devices |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210514558U true CN210514558U (en) | 2020-05-12 |
Family
ID=70583846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921125547.9U Expired - Fee Related CN210514558U (en) | 2019-07-17 | 2019-07-17 | Electric automobile power battery information monitoring devices |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210514558U (en) |
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2019
- 2019-07-17 CN CN201921125547.9U patent/CN210514558U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200512 Termination date: 20210717 |
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| CF01 | Termination of patent right due to non-payment of annual fee |