CN102121970A - Battery sensor for automobile - Google Patents
Battery sensor for automobile Download PDFInfo
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- CN102121970A CN102121970A CN2010105964490A CN201010596449A CN102121970A CN 102121970 A CN102121970 A CN 102121970A CN 2010105964490 A CN2010105964490 A CN 2010105964490A CN 201010596449 A CN201010596449 A CN 201010596449A CN 102121970 A CN102121970 A CN 102121970A
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Abstract
The invention relates to the technical field of automobile sensors, and in particular relates to a battery sensor for an automobile. A sampling resistor is adopted for obtaining the current information of a battery, has high precision and can be used for detecting small-signal current. The battery sensor comprises a sampling resistor, a voltage sampling circuit, a temperature sensor, an amplifier, an A/D converter and a microprocessor, wherein the sampling resistor is connected into the power supply circuit of the battery so as to cause the current of the battery to flow through the sampling resistor to obtain a current signal; the voltage sampling circuit is used for collecting the voltage signal of the battery and inputs the voltage signal into the A/D converter; the temperature sensor is used for collecting the temperature signal at an installation position and inputs the temperature signal into the A/D converter; the amplifier is used for amplifying the current signal and inputs the amplified current signal into the A/D converter; the A/D converter converts the received analog signal into a digital signal and inputs the digital signal into the microprocessor; and the microprocessor processes the current signal, the voltage signal and the temperature signal to obtain currents, voltages, electric quantity, temperatures and system diagnosis information.
Description
Technical field
The present invention relates to the automotive sensor technology field, be specifically related to the battery sensor of a kind of electric automobile or Hybrid Vehicle.
Background technology
Energy-conservation is the inevitable choice of building a resource-conserving and environment-friendly society with reducing discharging; Be the inevitable requirement of safeguarding Chinese nation's long-term interest, hybrid vehicle is the product that meets this energy-saving and emission-reduction policy, and one of core technology of hybrid vehicle is a power management techniques.In the power-supply management system of hybrid vehicle, battery sensor is important component parts.The Hall-type current sensor detects electric current to present battery sensor, temperature sensor comes the mode of detected temperatures to realize by adopting independently.And the Hall-type current sensor by Hall chip by the induction coiling or pass that the changes of magnetic field that primary current produced of magnetism gathering rings on the sensor realizes, its accuracy of detection is influenced by former limit conductor structure and cooperation thereof, simultaneously, because sensor output signal is voltage, the current signal of the little linearity of dynamic range, in the weather (as temperature, humidity, dust) and abominable electromagnetic environment of complexity, very easily be subjected to external interference; And temperature sensor needs independently to be arranged on the accumulator, still has the little defective of output signal dynamic range, is subject to the influence of complicated climatic environment and abominable electromagnetic environment.Influence battery current, voltage, temperature monitoring and electric weight assessment.
In sum, the battery sensor that is made of independently Hall-type current sensor and temperature sensor exists following defective in vehicle power management system is used:
1. because Hall-type current sensor and temperature sensor independence arrangement cause the car load wire harness to increase and difficult arrangement;
2. linear signal transmission dynamic range is little, is subject to the influence of weather or electromagnetic environment, causes the signal sampling precision to reduce;
3. in the wide dynamic detection range of 1mA to 1000A, can not carry out mA level small-signal current and detect.
4. electric current, voltage and temperature signal need carry out independent device and handle.
Therefore, need the micro-ohm level sampling resistor of a kind of high precision, low temperature drift, low thermopower, and use the miniaturization of this sampling resistor, integrated battery sensor.
Summary of the invention
In view of this,, the invention provides a kind of automotive battery sensor, use sampling resistor to obtain the current information of battery, have high precision, can carry out small-signal current and detect in order to address the above problem.
The object of the present invention is achieved like this: the automotive battery sensor comprises
Sampling resistor is used for being connected the current supply circuit of battery, and the electric current of battery is flow through from sampling resistor, obtains current signal;
Voltage sample circuit is used to gather the voltage signal of battery and input a/d converter;
Temperature sensor is used to gather the temperature signal of installation site, and input a/d converter;
Amplifier is used for and will be input to A/D converter after the current signal amplification;
A/D converter is a digital signal with the analog signal conversion of accepting, input microprocessor;
Microprocessor after current signal, voltage signal and temperature signal handled, obtains electric current, voltage, electric weight, temperature and system diagnostics information.
Further, the data output end of described microprocessor is electrically connected with the LIN bus of automobile, and electric current, voltage, electric weight, temperature and the system diagnostics information that obtains is sent by the LIN bus.
Further, described sampling resistor comprises resistance and is arranged at the electrode at resistance two ends that described resistance is manganin manganin alloy resistance.
Further, described electrode is the oxygen-free copper electrode.
Further, described resistance and electrode weld by high-power electron beam.
Further, the resistance value of described resistance＜200 μ Ω, sense value＜3nH, solder joint thermopower＜2 μ V, resistive element material temperature coefficient is ± 15ppm/ ℃.
Further, the gain of described amplifier and A/D converter is adjusted automatically along with the amplitude of input signal.
Further, when microprocessor can't accept the request signal that the LIN host node sends, Control of Automobile entered dormant state with battery sensor.
Further, in the dormant state, timing microprocessor is the wakeup of automotive battery sensor at interval, monitoring quiescent current consumption, and electric current, voltage, the temperature of record wake-up times and monitoring.
The invention has the beneficial effects as follows: use sampling resistor to obtain current signal, be difficult for being subjected to weather or electromagnetic environment to influence, the sampling precision height, can carry out small-signal current detects, further in the technical scheme, there is the dissipation power consumption in resistance when considering big electric current, can the temperature acquisition of transducer arrangements point be impacted, through calculating and analogue simulation, set specific parameter, resistance is selected the MANGANIN(manganin manganin alloy for use) material, electrode selects the oxygen-free copper of high conductivity, electrode combines with resistive element and adopts high-power electron beam welding, the influence of power consumption to temperature acquisition of can avoiding dissipating; In addition, the gain of amplifier and A/D converter is adjusted automatically along with the amplitude of input signal, can be reduced in the dynamic input signal distortion in the wide region, handles with the detection that realizes little current signal.
Description of drawings
In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention is described in further detail below in conjunction with accompanying drawing:
Fig. 1 shows the structural representation of automotive battery sensor;
Fig. 2 shows the structural representation of the sampling resistor in the automobile batteries sensor;
Fig. 3 shows the vertical view of Fig. 2.
Embodiment
Referring to Fig. 1, the automotive battery sensor of present embodiment comprises
Sampling resistor is used for being connected the current supply circuit of battery, and the electric current of battery is flow through from sampling resistor, obtains current signal; Referring to Fig. 2,3, described sampling resistor comprises resistance 1 and is arranged at the electrode 2 at resistance 1 two ends, described resistance 1 is manganin manganin alloy resistance, described electrode 2 is the oxygen-free copper electrode, described resistance 1 welds by high-power electron beam with electrode 2, the pilot hole 4 that described electrode 1 is provided with electrode column 3 and is used to assemble electric fastening bolt, described electrode column 3 has three, respectively as reference electrode and potential electrode.The resistance value of described resistance is 150 μ Ω, and rated power is designed to 20W, sense value＜3nH, and solder joint thermopower＜2 μ V, resistive element material temperature coefficient is ± 15ppm/ ℃.，
Voltage sample circuit is used to gather the voltage signal of battery and input a/d converter;
Temperature sensor is used to gather the temperature signal of installation site, and input a/d converter;
Amplifier is used for and will be input to A/D converter after the current signal amplification;
A/D converter is a digital signal with the analog signal conversion of accepting, input microprocessor;
Microprocessor after current signal, voltage signal and temperature signal handled, obtains electric current, voltage, electric weight, temperature and system diagnostics information.The data output end of described microprocessor is electrically connected with the LIN bus of automobile, and electric current, voltage, electric weight, temperature and the system diagnostics information that obtains is sent by the LIN bus, and power supply source management system or engine management system are judged the accumulator running status
The sampling resistor working current is when 10mA, its sampled signal amplitude is about 15 μ V, and working current is when 1000A, its sampled signal amplitude is about 150mV, for being reduced in the dynamic input signal distortion in the wide region, can control gain adjustment automatically of described amplifier and A/D converter by microprocessor along with the amplitude of input signal.
When microprocessor can't accept the request signal that the LIN host node sends, Control of Automobile entered dormant state with battery sensor.In the dormant state, timing microprocessor is the wakeup of automotive battery sensor at interval, the monitoring quiescent current consumption, and write down wake-up times and monitor current thereof, voltage, temperature, so that the accurate Calculation accumulator electric-quantity.
The above only preferably is not limited to the present invention for of the present invention, and obviously, those skilled in the art can carry out various changes and modification and not break away from the spirit and scope of the present invention the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.
Claims (9)
1. the automotive battery sensor is characterized in that: comprise
Sampling resistor is used for being connected the current supply circuit of battery, and the electric current of battery is flow through from sampling resistor, obtains current signal;
Voltage sample circuit is used to gather the voltage signal of battery and input a/d converter;
Temperature sensor is used to gather the temperature signal of installation site, and input a/d converter;
Amplifier is used for and will be input to A/D converter after the current signal amplification;
A/D converter is a digital signal with the analog signal conversion of accepting, input microprocessor;
Microprocessor after current signal, voltage signal and temperature signal handled, obtains electric current, voltage, electric weight, temperature and system diagnostics information.
2. automotive battery sensor as claimed in claim 1 is characterized in that: the data output end of described microprocessor is electrically connected with the LIN bus of automobile, and electric current, voltage, electric weight, temperature and the system diagnostics information that obtains is sent by the LIN bus.
3. automotive battery sensor as claimed in claim 1 is characterized in that: described sampling resistor comprises resistance and is arranged at the electrode at resistance two ends that described resistance is manganin manganin alloy resistance.
4. automotive battery sensor as claimed in claim 3 is characterized in that: described electrode is the oxygen-free copper electrode.
5. as automotive battery sensor as described in the claim 4, it is characterized in that: described resistance and electrode weld by high-power electron beam.
6. as automotive battery sensor as described in the claim 3,4 or 5, it is characterized in that: the resistance value of described resistance＜200 μ Ω, sense value＜3nH, solder joint thermopower＜2 μ V, resistive element material temperature coefficient is ± 15ppm/ ℃.
7. as automotive battery sensor as described in the claim 6, it is characterized in that: the gain of described amplifier and A/D converter is adjusted automatically along with the amplitude of input signal.
8. as automotive battery sensor as described in the claim 7, it is characterized in that: when microprocessor can't accept the request signal that the LIN host node sends, Control of Automobile entered dormant state with battery sensor.
9. as automotive battery sensor as described in the claim 8, it is characterized in that: in the dormant state, timing microprocessor is the wakeup of automotive battery sensor at interval, the monitoring quiescent current consumption, and write down electric current, voltage, the temperature of wake-up times and monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105964490A CN102121970A (en) | 2010-12-20 | 2010-12-20 | Battery sensor for automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105964490A CN102121970A (en) | 2010-12-20 | 2010-12-20 | Battery sensor for automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102121970A true CN102121970A (en) | 2011-07-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2010105964490A Pending CN102121970A (en) | 2010-12-20 | 2010-12-20 | Battery sensor for automobile |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037367A (en) * | 2017-01-13 | 2017-08-11 | 孔文欣 | Battery uses the measuring method and measuring system of electricity |
| CN109116085A (en) * | 2018-08-09 | 2019-01-01 | 重庆长安汽车股份有限公司 | A kind of automobile quiescent current monitoring system and method |
| CN109782205A (en) * | 2017-11-10 | 2019-05-21 | 大陆汽车电子（连云港）有限公司 | Intelligent battery sensor detector |
| CN111880104A (en) * | 2017-10-23 | 2020-11-03 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040263150A1 (en) * | 2003-06-26 | 2004-12-30 | Ullrich Hetzler | Resistor arrangement, manufacturing method, and measurement circuit |
| DE202009000097U1 (en) * | 2009-02-06 | 2009-04-02 | Gigatronik Stuttgart Gmbh | Current measuring arrangement |
-
2010
- 2010-12-20 CN CN2010105964490A patent/CN102121970A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040263150A1 (en) * | 2003-06-26 | 2004-12-30 | Ullrich Hetzler | Resistor arrangement, manufacturing method, and measurement circuit |
| DE202009000097U1 (en) * | 2009-02-06 | 2009-04-02 | Gigatronik Stuttgart Gmbh | Current measuring arrangement |
Non-Patent Citations (2)
| Title |
|---|
| 李海军: "电动汽车电池管理系统的研究", 《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑 2009年》 * |
| 梁磊,杜家益,王忠: "基于CAN总线的混合动力汽车电池管理系统设计", 《现代车用动力》 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107037367A (en) * | 2017-01-13 | 2017-08-11 | 孔文欣 | Battery uses the measuring method and measuring system of electricity |
| CN111880104A (en) * | 2017-10-23 | 2020-11-03 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN111880104B (en) * | 2017-10-23 | 2022-05-13 | 宁德时代新能源科技股份有限公司 | Detection circuit and method, detector, battery device, vehicle and computer-readable storage medium |
| CN109782205A (en) * | 2017-11-10 | 2019-05-21 | 大陆汽车电子（连云港）有限公司 | Intelligent battery sensor detector |
| CN109782205B (en) * | 2017-11-10 | 2021-11-30 | 大陆汽车电子（连云港）有限公司 | Intelligent battery sensor testing device |
| CN109116085A (en) * | 2018-08-09 | 2019-01-01 | 重庆长安汽车股份有限公司 | A kind of automobile quiescent current monitoring system and method |
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Application publication date: 20110713 |