CN102290848A - Lead-acid battery management system and management method thereof - Google Patents
Lead-acid battery management system and management method thereof Download PDFInfo
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- CN102290848A CN102290848A CN2011102468116A CN201110246811A CN102290848A CN 102290848 A CN102290848 A CN 102290848A CN 2011102468116 A CN2011102468116 A CN 2011102468116A CN 201110246811 A CN201110246811 A CN 201110246811A CN 102290848 A CN102290848 A CN 102290848A
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- 238000007726 management method Methods 0.000 title claims abstract description 39
- 239000002253 acid Substances 0.000 title claims abstract description 37
- 238000004891 communication Methods 0.000 claims abstract description 29
- 238000005070 sampling Methods 0.000 claims abstract description 28
- 238000012545 processing Methods 0.000 claims abstract description 12
- 239000000178 monomer Substances 0.000 claims description 14
- 238000001514 detection method Methods 0.000 claims description 8
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000006698 induction Effects 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000007689 inspection Methods 0.000 claims description 3
- 238000005183 dynamical system Methods 0.000 description 5
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- 238000007599 discharging Methods 0.000 description 4
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Abstract
The invention relates to a lead-acid battery management system and a management method thereof; the lead-acid battery management system is used for a low voltage electric motor car and comprises a central processing unit, a sampling module, a CAN (Controller Area Network) communication module and a control module, wherein the sampling module is used for collecting the voltage, temperature and current signals of a lead-acid battery; the central processing unit is connected with the sampling module in a communication manner and is used for receiving and operating the signals of the sampling module; the CAN (Controller Area Network) communication module is connected with a charger and a finished car system by a CAN (Controller Area Network) bus in a communication way; and the central processing unit monitors the state of the battery and the system in real time and drives a control module to output a control signal for controlling according to the state.
Description
Technical field
The present invention relates to a kind of lead-acid battery management system and management method thereof, be applicable to of management and the protection of low pressure pure electric automobile with lead-acid power accumulator.
Background technology
For pure electric vehicle, electrokinetic cell and management system thereof are one of its key core technology.Battery management system is responsible for the collection of electrokinetic cell voltage, temperature and charging and discharging currents, the control of high-low voltage relay, the calculating of SOC and SOH, the monitoring of battery system and failure diagnosis, the balanced management of battery cell or the like function is an indispensable part in the car load control and management strategy.
The lead-acid battery technical development is very ripe, cheap, safe and reliable so far, can export bigger electric current and power, is applicable to the low tension motor vehicle.But along with wearing out of battery, descending can appear in its every performance index equally, can occur capacity attenuation in various degree between each cell, and cell voltage occurs unbalanced largely in the running.So lead-acid battery needs equally a kind of management system, monitors battery status in real time, protect not super-charge super-discharge of battery, prolongation battery shelf life.
At present how not comprise management system as the electric automobile of electrokinetic cell, can't detect battery status, be unfavorable for the maintenance of battery with lead-acid battery.
Summary of the invention
The objective of the invention is to solve the problem that administers and maintains of lead-acid battery, by detection voltage, temperature, analog quantitys such as electric current detect battery status in real time, and the problem that occurs in the vehicle ' process is in time handled.Simultaneously can do certain maintenance to battery.Can effectively protect battery, delay the battery aging, increase the service life.
The invention provides a kind of composition and function of low pressure electric vehicle lead-acid battery management system, hardware using centralized solution, collection and the control algolithm and the communication function of realization analog quantity on same circuit board.Specifically comprise plurality of voltages sampling, multichannel current sample, single channel current sample, relay control and time inspection, CAN communication module, detection of electrical leakage module, charging induction module, balance module.These modules all link to each other with central processing element, make control and corresponding by control strategy according to corresponding state simultaneously by software real-time detecting system state.This hardware outside connects the lead-acid battery wire harness by corresponding connector and gathers analog quantity, and by the CAN line with Full Vehicle System and charger communication.
Native system software is responsible for the calculating of analog quantity, and the processing of control logic is with the CAN communication and the information interaction of Full Vehicle System.Specifically comprise the calculating of system mode, high-voltage safety management algorithm, detection of electrical leakage, system fault diagnosis algorithm, battery nuclear power status detection and estimation, the processing of CAN communication.Native system has sampling and controlled function, and can be through CAN bus and charger and Full Vehicle System communication.Sampling module is responsible for the collection of cell voltage, temperature, electric current, by the computing of central processor unit, monitors battery and system mode in real time, and drive control module output.By with the communication of charger and Full Vehicle System, administer and maintain the reliable and secure operation of lead-acid battery.
Concrete technical scheme is as follows:
A kind of lead-acid battery management system, it is used for the low tension motor-car, comprise central processing unit, sampling module, CAN communication module and control module, described sampling module is used for the voltage to lead-acid battery, temperature and current signal are gathered, described central processor unit is connected and is used to receive the signal union of sampling module with the sampling module communication, described CAN communication module is connected with charger and Full Vehicle System communication through the CAN bus, described central processor unit is monitored battery and system mode in real time, and controls according to described state-driven control module output control signal.
Further, described central processing unit adopts a single-chip microcomputer.
Further, described CAN communication module is a CAN transceiver.
Further, sampling module comprises the plurality of voltages sampling module, multi way temperature sampling module and current sample module.
Further, also comprise relay control and time inspection module, the detection of electrical leakage module, the charging induction module, balance module, described current sample module comprise multichannel current sample module and single channel current sample module, and above-mentioned module is all carried out communication with central processing element and is connected.
Further, it is connected the wire harness of lead-acid battery and gathers analog quantity by plug-in unit with circuit, and is connected with Full Vehicle System and charger communication by the CAN line.
The management method of above-mentioned lead-acid battery management system; carry out the collection of each analog quantity of lead-acid battery; comprise monomer voltage; monomer temperature and bus current; handle that above-mentioned data are carried out the monitoring of system mode and to the control and the protection of battery; central processor unit is monitored battery and system mode in real time, and controls according to described state-driven control module output control signal.
Further, gather the voltage of every battery cell in the plurality of voltages sampling, every lead-acid battery needs two sample line, positive and negative each one, after hardware circuit switches this cell voltage dividing potential drop, enter the AD chip, export digital quantity, the digital quantity input single-chip microcomputer after via the SPI communication AD chip being transformed by AD conversion AD chip, calculate monomer voltage by single-chip microcomputer, monomer voltage is added up to obtain total voltage simultaneously.
Further, the temperature of every battery cell of multi way temperature sampling collection; Introduce battery temperature and ambient temperature by temperature sensor, transform through AD digital quantity is imported single-chip microcomputer, calculate current temperature value by single-chip microcomputer.
Further, in the current sample, bus current is converted to voltage signal, digital quantity is imported single-chip microcomputer, calculate current value by single-chip microcomputer through the AD chip by Hall current sensor and related hardware circuit.
Compare with present prior art, the present invention same circuit board integrated sampling and controlled function.With low cost, simple and reliable.
Description of drawings
Fig. 1 is that this management system structured flowchart reaches in the connection diagram of charger, lead-acid power accumulator, whole-control system.
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.
Native system can be finished the collection of each analog quantity of lead-acid battery, comprises monomer voltage, monomer temperature and bus current.Utilize these data to carry out the monitoring of system mode and simultaneously to the control and the protection of battery.
The plurality of voltages sampling, this management system is gathered the voltage of every battery cell.Because the lead-acid battery volume is bigger, distribute and may not concentrate at car load, many batteries are scattered in front deck, base plate and boot, its discharging current is bigger again simultaneously, so in order to reduce the rat tail pressure drop, every battery needs two sample line, positive and negative each one.After switching this cell voltage dividing potential drop, hardware circuit enters the AD chip, by AD conversion AD chip output digital quantity, digital quantity input single-chip microcomputer after via the SPI communication AD chip being transformed calculates monomer voltage by single-chip microcomputer, monomer voltage is added up can obtain total voltage simultaneously.
The multi way temperature sampling, this management system is gathered the temperature of every battery cell.Introduce battery temperature and ambient temperature by temperature sensor, transform through AD digital quantity is imported single-chip microcomputer, calculate current temperature value by single-chip microcomputer.
Current sample, current sample can the current charging and discharging states of monitoring battery group, and the size of charging and discharging currents according to battery status, is in time adjusted and discharged and recharged the maximum current limit value with the protection battery.The accuracy of current sample directly has influence on the calculating of battery nuclear power state (SOC) simultaneously.This module is converted to voltage signal by Hall current sensor and related hardware circuit with bus current, through the AD chip digital quantity is imported single-chip microcomputer, calculates current value by single-chip microcomputer.
SOC predicts, calculates the nuclear power state of current battery, i.e. the current residual capacity.Native system adopts the combination of ampere-hour integration method and open circuit voltage method to calculate SOC.In the car load running, the variation of adopting the ampere-hour integration method to calculate SOC writes single-chip microcomputer EEPROM with current SOC value simultaneously when set time and system-down.The prediction of initial SOC, i.e. the prediction of SOC during system boot utilizes the relation of open circuit voltage and SOC can obtain a SOC, the SOC when reading single-chip microcomputer EEPROM and can obtain shutting down last time, both respectively account for 50%, as the current SOC of system.
Whether detection of electrical leakage is used to detect battery and leaks electricity.
The CAN transceiver is responsible for receiving and sending the CAN data, with the Full Vehicle System communication.
The charging induction is used to detect charger and charging wire state, does not allow vehicle ' when detecting charged state.
Balance module is used for the maintenance of battery.The long-term decay of using battery can cause battery capacity reaches the inconsistency that each monomer is seen.Wherein a kind of showing as under static state, the difference of each battery cell voltage become big.This module can detection module voltage be higher than the monomer of average, and to its discharge, thereby reach balanced effect.
Relay is controlled, and comprises the precharge and the safety cut-off function of dynamical system.Pre-charging functions is used to guarantee the safety connection of dynamical system, may cause the adhesion of relay when the moment connection of whole dynamical system, so increase pre-charge-relay and pre-charge resistance.After receiving the dynamical system close command, first closed pre-charge-relay, wait for then the dynamical system output end voltage more than or equal to the battery-end total voltage 80% after, closed more anodal relay disconnects pre-charge-relay afterwards.When this management system detects catastrophe failure and when unusual, disconnects all relays, guarantee car load and personal security.
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 (10)
1. lead-acid battery management system, it is characterized in that, it is used for the low tension motor-car, comprise central processing unit, sampling module, CAN communication module and control module, described sampling module is used for the voltage to lead-acid battery, temperature and current signal are gathered, described central processor unit is connected and is used to receive the signal union of sampling module with the sampling module communication, described CAN communication module is connected with charger and Full Vehicle System communication through the CAN bus, described central processor unit is monitored battery and system mode in real time, and controls according to described state-driven control module output control signal.
2. lead-acid battery management system as claimed in claim 1 is characterized in that described central processing unit adopts a single-chip microcomputer.
3. lead-acid battery management system as claimed in claim 1 or 2 is characterized in that, described CAN communication module is a CAN transceiver.
4. as each described lead-acid battery management system among the claim 1-3, it is characterized in that sampling module comprises the plurality of voltages sampling module, multi way temperature sampling module and current sample module.
5. as each described lead-acid battery management system among the claim 1-4, it is characterized in that, also comprise relay control and return the inspection module, the detection of electrical leakage module, the charging induction module, balance module, described current sample module comprise multichannel current sample module and single channel current sample module, and above-mentioned module is all carried out communication with central processing element and is connected.
6. as each described lead-acid battery management system among the claim 1-5, it is characterized in that it is connected the wire harness of lead-acid battery and gathers analog quantity by plug-in unit with circuit, and connect with Full Vehicle System and charger communication by the CAN line.
7. as the management method of lead-acid battery management system as described in the claim 1-6; it is characterized in that; carry out the collection of each analog quantity of lead-acid battery; comprise monomer voltage; monomer temperature and bus current; handle that above-mentioned data are carried out the monitoring of system mode and to the control and the protection of battery, central processor unit is monitored battery and system mode in real time, and control according to described state-driven control module output control signal.
8. as the management method of lead-acid battery management system as described in the claim 7, it is characterized in that, gather the voltage of every battery cell in the plurality of voltages sampling, every lead-acid battery needs two sample line, positive and negative each one, enters the AD chip after hardware circuit switches this cell voltage dividing potential drop, by AD conversion AD chip output digital quantity, digital quantity input single-chip microcomputer after via the SPI communication AD chip being transformed calculates monomer voltage by single-chip microcomputer, monomer voltage is added up can obtain total voltage simultaneously.
9. as the management method of lead-acid battery management system as described in claim 7 or 8, it is characterized in that the temperature that every battery cell is gathered in the multi way temperature sampling; Introduce battery temperature and ambient temperature by temperature sensor, transform through AD digital quantity is imported single-chip microcomputer, calculate current temperature value by single-chip microcomputer.
10. as the management method of lead-acid battery management system as described in each among the claim 7-9, it is characterized in that, in the current sample, by Hall current sensor and related hardware circuit bus current is converted to voltage signal, through the AD chip digital quantity is imported single-chip microcomputer, calculate current value by single-chip microcomputer.
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| CN 201110246811 CN102290848B (en) | 2011-08-25 | 2011-08-25 | Lead-acid battery management system and management method thereof |
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Cited By (10)
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|---|---|---|---|---|
| CN102830703A (en) * | 2012-09-19 | 2012-12-19 | 苏州工业园区职业技术学院 | Single drive automatic loading and unloading automatic guided vehicle (AGV) control system |
| CN104267352A (en) * | 2014-09-28 | 2015-01-07 | 苏州克兰兹电子科技有限公司 | Multifunctional electric vehicle battery management system |
| CN104617348A (en) * | 2015-01-30 | 2015-05-13 | 成都星炫科技有限公司 | Battery monitoring device of electrocar for children |
| CN105216650A (en) * | 2015-11-06 | 2016-01-06 | 浙江绿源电动车有限公司 | Battery-driven car and charging unit |
| CN105490331A (en) * | 2015-12-19 | 2016-04-13 | 江苏常隆客车有限公司 | Battery management system for electric vehicles |
| CN107009908A (en) * | 2017-03-31 | 2017-08-04 | 范兆军 | Intelligent management system for electric vehicle |
| CN107390571A (en) * | 2017-06-19 | 2017-11-24 | 江苏大学 | A kind of batteries of electric automobile packet system and its measure voltage ＆ current method |
| CN108189689A (en) * | 2017-12-29 | 2018-06-22 | 智车优行科技（北京）有限公司 | The cell managing device and method of integrated security unit |
| CN108501723A (en) * | 2017-11-27 | 2018-09-07 | 安徽特凯新能源科技有限公司 | A kind of battery management system with error correcting capability |
| CN110010985A (en) * | 2019-03-06 | 2019-07-12 | 重庆雅讯电源技术有限公司 | Chip architecture for lead-acid accumulator intelligent management |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102830703A (en) * | 2012-09-19 | 2012-12-19 | 苏州工业园区职业技术学院 | Single drive automatic loading and unloading automatic guided vehicle (AGV) control system |
| CN104267352A (en) * | 2014-09-28 | 2015-01-07 | 苏州克兰兹电子科技有限公司 | Multifunctional electric vehicle battery management system |
| CN104617348A (en) * | 2015-01-30 | 2015-05-13 | 成都星炫科技有限公司 | Battery monitoring device of electrocar for children |
| CN105216650A (en) * | 2015-11-06 | 2016-01-06 | 浙江绿源电动车有限公司 | Battery-driven car and charging unit |
| CN105490331A (en) * | 2015-12-19 | 2016-04-13 | 江苏常隆客车有限公司 | Battery management system for electric vehicles |
| CN107009908A (en) * | 2017-03-31 | 2017-08-04 | 范兆军 | Intelligent management system for electric vehicle |
| CN107390571A (en) * | 2017-06-19 | 2017-11-24 | 江苏大学 | A kind of batteries of electric automobile packet system and its measure voltage ＆ current method |
| CN108501723A (en) * | 2017-11-27 | 2018-09-07 | 安徽特凯新能源科技有限公司 | A kind of battery management system with error correcting capability |
| CN108189689A (en) * | 2017-12-29 | 2018-06-22 | 智车优行科技（北京）有限公司 | The cell managing device and method of integrated security unit |
| CN108189689B (en) * | 2017-12-29 | 2021-07-16 | 智车优行科技（北京）有限公司 | Battery management device and method of integrated safety unit |
| CN110010985A (en) * | 2019-03-06 | 2019-07-12 | 重庆雅讯电源技术有限公司 | Chip architecture for lead-acid accumulator intelligent management |
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