CN102709979B - Integrated autonomous control system for power battery - Google Patents

Integrated autonomous control system for power battery Download PDF

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Publication number
CN102709979B
CN102709979B CN201210186232.1A CN201210186232A CN102709979B CN 102709979 B CN102709979 B CN 102709979B CN 201210186232 A CN201210186232 A CN 201210186232A CN 102709979 B CN102709979 B CN 102709979B
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array
microcontroller
lithium battery
output
electric core
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CN102709979A (en
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朱泽州
杜尚明
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

Abstract

The invention relates to an integrated autonomous control system for a power battery. The system comprises a micro control unit (MCU), wherein the signal output end of the MCU is connected with a lithium battery core array through a switching effector; the lithium battery core array is connected with the signal input end of the MCU through a voltage detection circuit; the switching effector is connected with a charging circuit and an output circuit through a main transformer array respectively; and a communication port of the MCU is connected with a monitor. The charging circuit is connected with a power supply to start charging, the voltage detection circuit detects the voltage of each single battery in the lithium battery core array in real time, and if the voltage of a certain single battery is abnormal, the system disconnects the single battery from a battery pack to prolong the service life of the battery pack. In addition, the monitor is used for feeding back the state of the battery pack in real time to facilitate maintenance and management.

Description

Integrated electrokinetic cell self-control system
Technical field
The present invention relates to field of batteries, especially a kind of integrated electrokinetic cell self-control system.
Background technology
At present, there are following several defects in existing battery control system:
The first, the limited battery pack of only controlling the size, the battery pack of power bus, the electric power aircraft etc. of uncontrollable hundreds of batteries composition;
The second, can only realize Real-Time Monitoring, rest on the aspect of controlling battery, cannot or be sent on other equipment data storage, there is no the functions such as wired instrument, wireless data sending, be not easy to maintenance and management;
The 3rd, can only discharge and recharge record by keeping track of history, but cannot Real-time Feedback battery status, this just likely causes electric power in running car way to be cut off suddenly, has potential safety hazard;
The 4th, because meeting in lithium battery serial discharge process is because of the inconsistency of lithium battery, and part battery core in fragile battery pack causes lithium battery group to damage.
Summary of the invention
The object of the present invention is to provide a kind of battery pack inside, compatible strong, integrated electrokinetic cell self-control system of being convenient to maintenance and management, can extending battery of being integrated in.
For achieving the above object, the present invention has adopted following technical scheme: a kind of integrated electrokinetic cell self-control system, comprise microcontroller, its signal output part is connected with lithium battery electric core array by transition effects device, lithium battery electric core array is connected with the signal input part of microcontroller by voltage detecting circuit, transition effects device connects respectively charging circuit, output circuit by main transformer array, and the communication port of microcontroller connects monitor; The signal output part of described microcontroller is connected with the first input end of transition effects device, and the 3rd input/output terminal of transition effects device is connected with lithium battery electric core array; Described voltage detecting circuit is made up of solid-state detection relay array and voltage sensor, lithium battery electric core array is connected with the input of solid-state detection relay array, the output of solid-state detection relay array is connected with the input of voltage sensor, and the output of voltage sensor is connected with the signal input part of microcontroller; The second input/output terminal of described transition effects device is connected with the 3rd input/output terminal of main transformer array, and the second output of main transformer array is connected with output circuit, and the first input end of main transformer array is connected with charging circuit.
As shown from the above technical solution, charging circuit in the present invention starts charging while accessing power supply, voltage detecting circuit detects the voltage of each battery cell in lithium battery electric core array in real time, if certain battery cell voltage occurs when abnormal, system will disconnect the connection of this battery cell and battery pack, to extend the useful life of battery pack.In addition, monitor is set the state of battery pack is carried out to real-time status feedback, be convenient to maintenance and management.In a word, the present invention has that equilibrium charging, series connection balanced discharge, fault detect in real time, the function of real-time status feedback, has extended the useful life of battery.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present invention;
Fig. 2 is the connecting circuit schematic diagram of transition effects device, lithium battery electric core array, voltage detecting circuit and microcontroller.
Embodiment
A kind of integrated electrokinetic cell self-control system, comprise microcontroller 1, its signal output part is connected with lithium battery electric core array 2 by transition effects device 3, lithium battery electric core array 2 is connected with the signal input part of microcontroller 1 by voltage detecting circuit 5, transition effects device 3 connects respectively charging circuit, output circuit by main transformer array, described charging circuit connects low pressure high current power supply, the communication port of microcontroller 1 connects monitor 4, described monitor 4 adopts LCD display and/or alarm, as shown in Figure 1.If charging circuit access low-tension supply, main transformer array is still exported low pressure, otherwise, if charging circuit access high voltage source, main transformer array transformation, output low pressure.
As shown in Figure 1, the signal output part of described microcontroller 1 is connected with the first input end of transition effects device 3, and the 3rd input/output terminal of transition effects device 3 is connected with lithium battery electric core array 2; Described voltage detecting circuit 5 is made up of solid-state detection relay array and voltage sensor, lithium battery electric core array 2 is connected with the input of solid-state detection relay array, the output of solid-state detection relay array is connected with the input of voltage sensor, and the output of voltage sensor is connected with the signal input part of microcontroller 1; The second input/output terminal of described transition effects device 3 is connected with the 3rd input/output terminal of main transformer array, and the second output of main transformer array is connected with output circuit, and the first input end of main transformer array is connected with charging circuit.The effect of solid-state detection relay array is the voltage that poll is measured each battery cell in lithium battery electric core array 2 accurately, the not SOC electric weight of conventional batteries estimation.
As shown in Figure 1, the signal input part of described microcontroller 1 is connected with the temperature sensor, current sensor and the humidity sensor that are encapsulated in lithium battery electric core array 2, the I of microcontroller 1 2c interface be connected from lithium battery electric core array.If the temperature that temperature sensor detects is higher than 40 ° of C, or during lower than 5 ° of C, point out user to be not suitable for charging by monitor 4; Or, in the time of battery cell excess Temperature, directly cut off this battery cell.Electric current in current sensor testbus, i.e. the electric current of output port, if exceed user's set point, passes through alarm equipment alarm.The humidity that humidity sensor detects directly shows in LCD display.
As shown in Figure 1, described transition effects device 3 adopts relay group, each relay in relay group and the corresponding connection of each battery cell in lithium battery electric core array 2, transition effects device 3 is for controlling the connected mode of lithium battery electric core array 2 battery cells.The information that temperature sensor, current sensor and humidity sensor collect can send in real time, and ambient temperature and humidity significantly point out can to higher or lower than user's setting threshold time user, be presented in LCD display, or pass through alarm equipment alarm.
Native system is the intellectualized management system that is encapsulated in battery pack inside, itself and battery pack Highgrade integration, by the information gathering of each battery core of battery pack inside is also analyzed, complete control work by transition effects device 2, reach the object from master control.
In discharge process; voltage detecting circuit 5 will detect every battery cell; if when certain piece battery cell occurs extremely or voltage is higher; microcontroller 1 will disconnect by transition effects device 2 connection of this piece battery cell and battery pack; be User Defined until assembled battery total voltage drops to the x%(x of low voltage limit threshold value); if after this whether voltage drop can point out user to continue to use to threshold limit, continue to use and may cause unpredictable consequence.
In the time that user accesses charge power supply, i.e., when charging circuit access low pressure high current power supply, can be switched to charged state.In charging process, all battery cells are switched to parallel operation state by system, and between charge period, system can disconnect saturated battery one by one, until all battery cells have charged, just recovers series connection output state.
System in the course of the work, sends system mode by information port, can access wireless data sending agreement, and information is passed to monitor 4 or mobile device, and mobile device is to carry out the setting parameter of completion system by corresponding software.
Microcontroller 1 is AVR by ATMEGA2560-16U(core processor) main control chip and the required peripheral circuit of minimum system, the program of this MCU burning in advance completes, device parameter and operation policy store, in the register of main control chip, can be changed by user, and its rated voltage is 5V, built-in pressurizer, can be directly by battery-powered, power is minimum, and monolithic MCU at least can manage 69 battery cells, can expand by 74HC595 chip, also can pass through I 2c interface and from system docking, makes controlled battery number of monomers order there is no the upper limit.And it can access 16 groups of analog sensors, and 256 digital sensors, can change according to concrete application scheme.
M2# is the minimum system plate of the microcontroller 1 shown in Fig. 2, is responsible for the center-control to system, and M4# is the voltage sensor interface of microcontroller 1, and M3# is the I2C interface of microcontroller 1.S1 is solid-state relay control winding displacement, and S2 is static two electric shock Control winding displacement, and S1, S2 access respectively the I/O interface of microcontroller 1.The whole double-contact relays that are connected with S2 interface belong to transition effects device 3; The SSR being connected with S1 interface belongs to checkout equipment, every batteries monomer is connected with two SSR, the line of all SSR and battery cell corresponding to it and control interface is generically and collectively referred to as voltage detecting circuit 5, and Solid state relays abbreviation is called for short SSR, is solid-state relay; S2 is equivalent in Fig. 1, and the line between microcontroller 1 and transition effects device 3, only plays the effect of connection.
When system is in charging process, microcontroller 1 all exports high level to S2, each batteries monomer He Zong road is disconnected, at this moment, the low-voltage, high-current of charging is linked into the two ends of each batteries monomer and charges, meanwhile microcontroller 1 is by the conducting to S1 corresponding port output LOW voltage control solid-state relay, and every two scan successively, for example: No. 1, No. 2 conductings, other disconnections, after measurement, all disconnect No. 3, No. 4 conductings, after measurement, all disconnect, continue new round scanning, by that analogy.Thereby realize the accurate voltage of measuring each batteries monomer.After a certain batteries has been charged, input independent low level to corresponding S2 wiring, make this battery tripping, and access universal serial bus, after whole monomers have charged, complete charging operations, monitor shows the prompting of having charged.At this moment, each the batteries monomer in battery pack has all been charged to saturated, avoids the situation that occurs that in conventional batteries, some battery is overcharged or is not fully filled.
When system is in discharge process, microcontroller 1 is given the whole output low levels of S2, makes each batteries monomer serial access total road, meanwhile microcontroller 1 is by the conducting to S1 corresponding port output LOW voltage control solid-state relay, and every two scan successively, for example: No. 1, No. 2 conductings, other disconnections, after measurement, all disconnect No. 3, No. 4 conductings, after measurement, all disconnect, continue new round scanning, by that analogy.When a certain batteries breaks down or voltage lower than threshold value time, microcontroller 1 is controlled the corresponding port output high level of S2, can see by Fig. 2, when a certain batteries is by tripping time, be the normal serial output that can not affect total road, just voltage declines to some extent, for compact battery group to voltage request harshness can be by boosting or the mode of cut-in stand-by battery solves, less demanding to voltage drop for large-sized battery pack, can ignore the impact that it brings.Thereby make A-battery not after putting, reach the object of extending battery life.
In sum; charging circuit in the present invention starts charging while accessing power supply; voltage detecting circuit 5 detects the voltage of each battery cell in lithium battery electric core array 2 in real time; if while there is abnormal or electric voltage exception in certain battery cell; system will disconnect the connection of this battery cell and battery pack, to extend the useful life of battery pack.In addition, monitor 4 is set the state of battery pack is carried out to real-time status feedback, be convenient to maintenance and management.In a word, the present invention has that associating equilibrium charging, series connection balanced discharge, fault detect in real time, the function of real-time status feedback, has extended the useful life of battery.

Claims (5)

1. an integrated electrokinetic cell self-control system, it is characterized in that: comprise microcontroller (1), its signal output part is connected with lithium battery electric core array (2) by transition effects device (3), lithium battery electric core array (2) is connected with the signal input part of microcontroller (1) by voltage detecting circuit (5), transition effects device (3) connects respectively charging circuit, output circuit by main transformer array, and the communication port of microcontroller (1) connects monitor (4); The signal output part of described microcontroller (1) is connected with the first input end of transition effects device (3), and the 3rd input/output terminal of transition effects device (3) is connected with lithium battery electric core array (2); Described voltage detecting circuit (5) is made up of solid-state detection relay array and voltage sensor, lithium battery electric core array (2) is connected with the input of solid-state detection relay array, the output of solid-state detection relay array is connected with the input of voltage sensor, and the output of voltage sensor is connected with the signal input part of microcontroller (1); The second input/output terminal of described transition effects device (3) is connected with the 3rd input/output terminal of main transformer array, and the second output of main transformer array is connected with output circuit, and the first input end of main transformer array is connected with charging circuit.
2. integrated electrokinetic cell self-control system according to claim 1, is characterized in that: described charging circuit connects low pressure high current power supply.
3. integrated electrokinetic cell self-control system according to claim 1, is characterized in that: described monitor (4) adopts LCD display and/or alarm.
4. integrated electrokinetic cell self-control system according to claim 1, it is characterized in that: the signal input part of described microcontroller (1) is connected with the temperature sensor, current sensor and the humidity sensor that are encapsulated in lithium battery electric core array (2), the I of microcontroller (1) 2c interface be connected from lithium battery electric core array.
5. integrated electrokinetic cell self-control system according to claim 1, it is characterized in that: described transition effects device (3) adopts relay group each relay in relay group and the corresponding connection of each battery cell in lithium battery electric core array (2).
CN201210186232.1A 2012-06-07 2012-06-07 Integrated autonomous control system for power battery Expired - Fee Related CN102709979B (en)

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CN104852418B (en) * 2014-12-19 2017-12-08 北汽福田汽车股份有限公司 It is a kind of to prevent from crossing the method and system put when battery charges
US20170092994A1 (en) * 2015-09-25 2017-03-30 Intel Corporation Smart battery with integrated sensing and electronics
CN106654416A (en) * 2017-01-19 2017-05-10 浙江邻居智能科技有限公司 Maintenance structure and method of battery pack
CN108337657A (en) * 2018-03-27 2018-07-27 新日(无锡)发展有限公司 Batteries of electric automobile condition monitoring system based on mobile phone

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Publication number Priority date Publication date Assignee Title
CN1747278A (en) * 2005-10-21 2006-03-15 成都龙盾数码通信技术有限公司 Circuit for controlling series battery charge and discharge
CN201210622Y (en) * 2008-05-21 2009-03-18 惠州市蓝微电子有限公司 Electric core charging and discharging control management circuit for lithium ion or polymer battery
CN102005797A (en) * 2010-12-08 2011-04-06 夏正奎 Active self-management charging device of lithium-ion power battery
CN202616843U (en) * 2012-06-07 2012-12-19 朱泽州 Autonomous integrated power battery control system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1747278A (en) * 2005-10-21 2006-03-15 成都龙盾数码通信技术有限公司 Circuit for controlling series battery charge and discharge
CN201210622Y (en) * 2008-05-21 2009-03-18 惠州市蓝微电子有限公司 Electric core charging and discharging control management circuit for lithium ion or polymer battery
CN102005797A (en) * 2010-12-08 2011-04-06 夏正奎 Active self-management charging device of lithium-ion power battery
CN202616843U (en) * 2012-06-07 2012-12-19 朱泽州 Autonomous integrated power battery control system

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