CN101487879A - Battery status detecting sensor, power supply management system and detecting method thereof - Google Patents

Battery status detecting sensor, power supply management system and detecting method thereof Download PDF

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Publication number
CN101487879A
CN101487879A CNA2008102447584A CN200810244758A CN101487879A CN 101487879 A CN101487879 A CN 101487879A CN A2008102447584 A CNA2008102447584 A CN A2008102447584A CN 200810244758 A CN200810244758 A CN 200810244758A CN 101487879 A CN101487879 A CN 101487879A
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CN
China
Prior art keywords
condition detecting
detecting sensor
battery condition
battery
accumulator
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Pending
Application number
CNA2008102447584A
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Chinese (zh)
Inventor
唐风敏
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chery Automobile Co Ltd
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Chery Automobile Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chery Automobile Co Ltd filed Critical Chery Automobile Co Ltd
Priority to CNA2008102447584A priority Critical patent/CN101487879A/en
Publication of CN101487879A publication Critical patent/CN101487879A/en
Pending legal-status Critical Current

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Abstract

The invention relates to a sensor for detecting the state of a storage battery, a power management system adopting the sensor and a detecting method of the system. The sensor is directly connected with the positive pole of the storage battery for supplying power and detecting voltage of the storage battery; simultaneously, the sensor is connected with the wiring harness by which the whole vehicle current flows back to the negative pole of the storage battery in series for detecting the current of the storage battery; a controller collects the data by an A/D conversion module; after treatment, the data are sent to a power management module by an LIN bus line for accurately and continuously detecting the state of the storage battery and adopting the appropriate power management in time to ensure the state of the whole vehicle.

Description

The battery condition detecting sensor, its power-supply management system and detection method
Technical field
The present invention relates to a kind of battery condition detecting sensor, a kind of power-supply management system that uses this sensor, and the detection method of this system.
Background technology
Along with the development of technology, the raising of people's living standard, requirement to vehicle safety and comfortableness is also more and more higher, incident is the increase of a large amount of consumers, various high-grade configurations are more and more, the increase of automobile electrical equipment, high-grade configuration increases has higher requirement to the car load electrical system, the situation of the detection accumulator that need continue for the security row that guarantees vehicle and reliability, so just, the car load electrical system is had higher requirement the situation of the detection accumulator that need continue for the security row that guarantees vehicle and reliability.Just there is one owing to the accumulator reason causes in present according to statistics 5 cars that break down.In order to reduce the voltage that fault must accurately detect accumulator, electric current and then take rational control strategy, so Saic Chery Automobile Co., Ltd has started the research and development to battery condition detecting sensor principle of work.
In sum, have following technical matters in the prior art: (1) can't accurately and constantly monitor the state of accumulator; (2) and then can't in time adopt suitable power management to guarantee whole vehicle state.
Summary of the invention
The object of the present invention is to provide a kind of battery condition detecting sensor and power-supply management system, accurately detect the voltage and current of accumulator, determine the situation of accumulator.
Another object of the present invention is to provide a kind of detection method of using above-mentioned battery condition detecting sensor and power-supply management system.
Sensor directly connects accumulator and is used for detecting battery tension.Simultaneously sensor string is associated in the wire harness that the car load electric current flows back to battery terminal negative, is used for detecting battery current.Controller is gathered these data by the A/D modular converter then, after the processing, sends to power management module by the LIN bus.
Concrete technical scheme is as follows:
A kind of battery condition detecting sensor comprises the accumulator sensor, microprocessor and communication interface, and described accumulator sensor battery condition, microprocessor processes also transmits and detects data, and communication interface will detect data and spread out of.
The battery condition detecting sensor directly connects battery positive voltage, is connected on the car load electric current simultaneously and flows back in the wire harness of battery terminal negative.
The accumulator sensor has a voltage detecting resistance and a current sense resistor, and described voltage detecting resistance is connected to battery positive voltage, and described current sense resistor is placed between accumulator negative electrode and the ground wire, detects the voltage and current of accumulator respectively.
The accumulator sensor has an A/D modular converter, and this A/D modular converter carries out the A/D conversion with the testing result of accumulator sensor.
Result after the conversion of microprocessor processes A/D modular converter, and the data after will handling are sent in the transmission buffer.
Communication interface will detect data and be sent to power management module.
Communication interface will detect data and be sent to power management module by the LIN bus.
The battery condition detecting sensor has 4 PIN angles, uses the current sense resistor of one 100 micro-ohm to detect battery current.
A kind of power-supply management system, comprise an above-mentioned battery condition detecting sensor and a power management module, the battery condition detecting sensor detects accumulator parameter, and be sent to power management module, power management module is judged according to the control algolithm of self and is made management, the battery condition detecting sensor passes a parameter to power management module by the LIN bus, the electrical appliance that power management module cuts off the different priority levels on the corresponding car load according to self control algolithm is guaranteed the safety traffic of car load and the startup of car load.
A kind of accumulator detection method, step is as follows:
(1) directly connects battery positive voltage as above-mentioned battery condition detecting sensor, be used for powering and detecting battery tension;
(2) the battery condition detecting sensor is connected on the car load electric current and flows back in the wire harness of battery terminal negative, is used for detecting battery current;
(3) one controllers are by A/D modular converter image data and processing;
(4) be sent to as above-mentioned power management module by the LIN bus;
(5) power management module utilizes the control algolithm of self to judge the situation of accumulator, and cuts off the electrical appliance of the different priority levels on the corresponding car load according to the parameter that receives, and guarantees the safety traffic of car load and the startup of car load.
Described battery condition detecting sensor has two kinds of mode of operations: normal mode and sleep pattern, when receiving the sleep commands that power management module sends, then enter sleep state, battery condition detecting sensor periodic wakeup oneself under sleep pattern, and when power management module needs, return normal mode.
Compare with present prior art, the present invention is by the voltage of precise monitoring accumulator, electric current, utilize self control algolithm to judge the situation of accumulator, and sending to energy supply control module by the LIN bus, sensor has sleep and normal two kinds of mode of operations, periodically wakes the detection accumulator parameter up owing to sensor under sleep pattern simultaneously, so can reduce self current drain on the one hand, can detect the accumulator situation in real time simultaneously.
Description of drawings
Fig. 1 is an overview of the present invention
Fig. 2 is a battery condition detecting sensor systematic schematic diagram
Fig. 3 is the battery condition detecting sensor
Fig. 4 is battery condition detecting sensor installation site
Among the figure: 1. accumulator 2. battery condition detecting sensors 3. power management module 4.LIN 5.CAN6. control signals
7. fuse block 8. relay groups 9. are not had a consumer 10. of independent control and are had consumer 11. the 2nd CAN 12. starters 13. generators 14. battery currents 15. battery tension 16.MUX 17.ADC 18.MCU 19.LINI/F of independent control
Embodiment
Describe the present invention with reference to the accompanying drawings below, it is a kind of preferred embodiment in the numerous embodiments of the present invention.
Power-supply management system mainly is made up of two parts as shown in Figure 1, a battery condition detecting sensor, and another is a power management module.The battery condition detecting sensor is mainly monitored battery parameter, and it sends to power management module with the state parameter of accumulator in real time by the LIN bus, comprises battery tension, electric current.Power management module is according to the battery tension, the electric current that receive, utilize self control algolithm to judge the situation of accumulator, and the electrical appliance that cuts off the different priority levels on the corresponding car load, guarantee the safety traffic of car load and the startup of car load, the state that therefore accurately detects accumulator is the key point of total system.
System principle as shown in Figure 2, the battery condition detecting sensor detects the parameter of accumulator, by the LIN bus these parameters is sent then.
The battery condition detecting sensor is made up of three parts:
(1) accumulator sensor: battery tension is by being connected to the resistance detection of battery positive voltage.Implement the monitoring battery tension and change, judge its real-time status, correctly differentiate different duties such as its charging, discharge, balance, power shortage, damage.Current sense resistor is placed between accumulator negative electrode and the ground wire, just is placed on electric current and flows back in the loop of accumulator.Current detecting is mainly used in electric weight and estimates.
(2) microprocessor: microprocessor (MCU) has two main tasks, and the one, handle the result that A/D changes.The 2nd, the data after handling are sent in the transmission buffer.
(3) communication interface: the battery condition detecting sensor is communicated by letter with power management module by the LIN bus.For CAN communication, LIN communication is a kind of single line, low cost solution.
The battery condition detecting sensor has two kinds of mode of operations: normal mode and sleep pattern.
(1) normal mode: the battery condition detecting sensor detects the voltage and current of accumulator, when needed these parameters are sent to power management module, only after the battery condition detecting sensor receives the sleep commands that power management module sends, just can enter sleep state.
(2) sleep pattern: the battery condition detecting sensor is periodically waken oneself up under sleep pattern, detects the voltage and current of accumulator between awake period.If in a period of time, voltage or electric current surpass restriction, the battery condition detecting sensor will be got back to normal mode and be sent wake-up signal simultaneously to power source management controller, and power source management controller sends " quiescent current is too high " warning message to each controller by the CAN bus.In case power management module needs, the battery condition detecting sensor all will turn back to normal mode of operation.
Battery condition detecting sensor running parameter is as shown in table 1:
Classification of waterproof IP66 Operating voltage 6V~18V
Storage temperature -40℃~+85℃ Working temperature -40℃~+125℃
Quiescent current <1000uA Working current 35mA
The maximum continuous load electric current +/-200A The LIN communication speed 19.2KB
Table 1 battery condition detecting sensor parameter
The battery condition detecting sensor as shown in Figure 3.
Battery condition detecting sensor installation site is as shown in Figure 4:
The battery condition detecting sensor is installed between battery terminal negative and the vehicle body ground, has 4 PIN angles.Because the sensor power supply is used to detect battery tension simultaneously, therefore must be directly connected to the positive pole of accumulator.
Sensor all is integrated in the sensor and (comprises the A/D conversion, processor, LIN communication interface or the like) with the resistance detection battery current of one 100 micro-ohm, the required all component of detection accumulator data.Sensor PIN angle is distributed as shown in table 2.
PIN Function Describe
P1 Connect battery terminal negative Detect electric current
P2 The LIN bus interface Communicate by letter with power management module
P3 Connect battery positive voltage Power supply detects voltage
P4 Connect vehicle body ground Ground wire
Table 2 battery condition detecting sensor PIN angle allocation table
In conjunction with the accompanying drawings the present invention has been carried out exemplary description above; obviously specific implementation of the present invention is not subjected to the restriction of aforesaid way; as long as the various improvement of having adopted method design of the present invention and technical scheme to carry out; or directly apply to other occasion without improvement, all within protection scope of the present invention.

Claims (13)

1, a kind of battery condition detecting sensor is characterized in that, comprises the accumulator sensor, microprocessor and communication interface, and described accumulator sensor battery condition, microprocessor processes also transmits and detects data, and communication interface will detect data and spread out of.
2, battery condition detecting sensor as claimed in claim 1 is characterized in that, the battery condition detecting sensor directly connects battery positive voltage, is connected on the car load electric current simultaneously and flows back in the wire harness of battery terminal negative.
3, battery condition detecting sensor as claimed in claim 2, it is characterized in that, the accumulator sensor has a voltage detecting resistance and a current sense resistor, described voltage detecting resistance is connected to battery positive voltage, described current sense resistor is placed between accumulator negative electrode and the ground wire, detects the voltage and current of accumulator respectively.
4, as each described battery condition detecting sensor among the claim 1-3, it is characterized in that the accumulator sensor has an A/D modular converter, this A/D modular converter carries out the A/D conversion with the testing result of accumulator sensor.
5, battery condition detecting sensor as claimed in claim 4 is characterized in that, data after the conversion of microprocessor processes A/D modular converter, and the data after will handling are sent in the transmission buffer.
6, as claim 1 or 5 described battery condition detecting sensors, it is characterized in that communication interface will detect data and be sent to power management module.
7, battery condition detecting sensor as claimed in claim 6 is characterized in that, communication interface will detect data and be sent to power management module by the LIN bus.
8, battery condition detecting sensor as claimed in claim 3 is characterized in that, the battery condition detecting sensor has 4 PIN angles, uses the current sense resistor of one 100 micro-ohm to detect battery current.
9, a kind of power-supply management system, it is characterized in that, comprise as a described battery condition detecting sensor of claim 1-8 and a power management module, the battery condition detecting sensor detects accumulator parameter, and being sent to power management module, power management module is judged according to the control algolithm of self and is made management.
10, power-supply management system as claimed in claim 9, it is characterized in that, the battery condition detecting sensor passes a parameter to power management module by the LIN bus, the electrical appliance that power management module cuts off the different priority levels on the corresponding car load according to self control algolithm is guaranteed the safety traffic of car load and the startup of car load.
11, a kind of accumulator detection method is characterized in that step is as follows:
(1) the battery condition detecting sensor as claim 1-8 directly connects battery positive voltage, is used for powering and detecting battery tension;
(2) the battery condition detecting sensor is connected on the car load electric current and flows back in the wire harness of battery terminal negative, is used for detecting battery current;
(3) one controllers are by A/D modular converter image data and processing;
(4) be sent to power management module by the LIN bus as claim 9 or 10.
12, accumulator detection method as claimed in claim 11 is characterized in that, also comprises the steps:
(5) power management module utilizes the control algolithm of self to judge the situation of accumulator, and cuts off the electrical appliance of the different priority levels on the corresponding car load according to the parameter that receives, and guarantees the safety traffic of car load and the startup of car load.
13, as claim 11 or 12 described accumulator detection methods, it is characterized in that, described battery condition detecting sensor has two kinds of mode of operations: normal mode and sleep pattern, when receiving the sleep commands that power management module sends, then enter sleep state, battery condition detecting sensor periodic wakeup oneself under sleep pattern, and when power management module needs, return normal mode.
CNA2008102447584A 2008-12-16 2008-12-16 Battery status detecting sensor, power supply management system and detecting method thereof Pending CN101487879A (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102079279A (en) * 2010-12-28 2011-06-01 奇瑞汽车股份有限公司 Power management system and control method for automobile body controller thereof
CN103415957A (en) * 2011-03-11 2013-11-27 日产自动车株式会社 Battery temperature control device
CN104118330A (en) * 2013-04-27 2014-10-29 上海汽车集团股份有限公司 Method controlling risk of starting failure and automotive electronic controller based on same
CN108695566A (en) * 2017-04-05 2018-10-23 广东广晟通信技术有限公司 A kind of synchronous control system framework promoting energy-saving efficiency
CN109001524A (en) * 2018-06-06 2018-12-14 北京长城华冠汽车技术开发有限公司 A kind of vehicle quiescent current detection device and detection method
CN109143075A (en) * 2018-07-16 2019-01-04 苏州朗捷通智能科技有限公司 A kind of acquisition method and system of voltage

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102079279A (en) * 2010-12-28 2011-06-01 奇瑞汽车股份有限公司 Power management system and control method for automobile body controller thereof
CN102079279B (en) * 2010-12-28 2013-03-06 奇瑞汽车股份有限公司 Control method for automobile body controller of power management system
CN103415957A (en) * 2011-03-11 2013-11-27 日产自动车株式会社 Battery temperature control device
CN104118330A (en) * 2013-04-27 2014-10-29 上海汽车集团股份有限公司 Method controlling risk of starting failure and automotive electronic controller based on same
CN108695566A (en) * 2017-04-05 2018-10-23 广东广晟通信技术有限公司 A kind of synchronous control system framework promoting energy-saving efficiency
CN109001524A (en) * 2018-06-06 2018-12-14 北京长城华冠汽车技术开发有限公司 A kind of vehicle quiescent current detection device and detection method
CN109143075A (en) * 2018-07-16 2019-01-04 苏州朗捷通智能科技有限公司 A kind of acquisition method and system of voltage

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Open date: 20090722