CN204103518U - Lithium-ions battery group voltage detecting and balance control system - Google Patents
Lithium-ions battery group voltage detecting and balance control system Download PDFInfo
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- CN204103518U CN204103518U CN201420374341.0U CN201420374341U CN204103518U CN 204103518 U CN204103518 U CN 204103518U CN 201420374341 U CN201420374341 U CN 201420374341U CN 204103518 U CN204103518 U CN 204103518U
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model discloses a kind of lithium-ions battery group voltage detecting and balance control system.This utility model comprises assembly controller, CAN and piece controller.Wherein, assembly controller comprises CAN interface, microcontroller, 7 cun of liquid crystal display screens, alarm and input keys; Piece controller comprises voltage collection circuit, equalizing circuit, single-chip microcomputer and CAN interface.In the utility model, every block lithium-ions battery is equipped with a piece controller, and each detection of piece controller complete independently cell voltage and the equilibrium of battery electric quantity, each piece controller is connected with assembly controller by CAN.Voltage detection method adopts the AD converter of single-chip microcomputer inside in piece controller directly to record, and energy unnecessary in cell consumes with the form of heat energy by adopting equalizing resistance by equalizing sections, reaches balanced object.The utility model circuit structure is succinct, certainty of measurement is high, antijamming capability is strong, flexibility is good, and with low cost.
Description
Technical field
The utility model relates to a kind of lithium-ions battery group voltage detecting and balance control system.
Background technology
Due to lithium-ions battery, there is specific energy and the advantage such as specific power is high, the charging interval is short, long service life, green non-pollution, replace traditional lead acid accumulator gradually, become the developing direction of novel secondary storage battery.In recent years, lithium-ions battery industry development is classified as key support object that is energy-conservation and New Energy Industry by China.
Because the individuality of lithium-ions battery is in difference, add that its environment for use is also not quite similar, cause the imbalance of each battery electric quantity, this imbalance can become increasing along with the increase of the life cycle of battery, will have a strong impact on the useful life of battery pack.Therefore, in order to extend the useful life of battery pack, lithium-ions battery in use, must carry out Balance route, makes the electricity of each battery identical as far as possible.
In existing technology, Balance route adopts the method for dynamic equalization mostly, by the method on energy trasfer unnecessary on a cell to other battery being realized the equilibrium of each battery, although this equalization methods energy obtains effective utilization, but balanced topological structure more complicated, overall flexibility is poor, and design cost is higher, and cost performance is low.And each battery voltage acquisition great majority use a voltage acquisition module to each battery pack in battery pack, pass through multidiameter option switch, the data acquisition of each cell voltage and total voltage is completed fast with scan mode, although the consistency of this method voltage acquisition is better, but need to solve in the voltage measurement of series-connected cell isolate altogether, the problem such as certainty of measurement, technical difficulty is large, and workload is relatively high.
Summary of the invention
In view of the foregoing defects the prior art has, the utility model provides a kind of lithium-ions battery group voltage detecting and balance control system, for the detection of each monomer battery voltage of lithium-ions battery group and the equilibrium of electricity.
The purpose of this utility model is achieved through the following technical solutions: a kind of lithium-ions battery group voltage detecting and balance control system.This utility model comprises assembly controller, CAN and piece controller.Wherein, assembly controller comprises CAN interface, microcontroller, 7 cun of liquid crystal display screens, alarm and input keys; Piece controller comprises voltage collection circuit, equalizing circuit, single-chip microcomputer and CAN interface.In the utility model, every block lithium-ions battery is equipped with a piece controller, and each detection of piece controller complete independently cell voltage and the equilibrium of battery electric quantity, each piece controller is connected with assembly controller by CAN.Assembly controller can complete the tasks such as corresponding display, warning after processing the information of voltage that piece controller sends.Meanwhile, the equalizing voltage value of the voltage of piece controller and setting also compares by assembly controller, judges whether to send equalizing signal to piece controller.
The utility model battery voltage detection method is directly recorded by the AD converter of piece controller single-chip microcomputer inside after adopting precision resistance dividing potential drop.Energy unnecessary in cell, by every block cell parallel equalizing resistance of battery pack, is consumed with the form of heat energy by resistance by equalizing sections, reaches balanced object.
In the utility model, piece controller by voltage collection circuit, gathers the voltage of corresponding cell, and its single-chip microcomputer, by after the cell voltage process that collects, is sent in CAN network with the form of voltage message by the CAN interface of self.Assembly controller passes through the voltage message that in the CAN interface CAN network of self, each piece controller sends, microcontroller is to after voltage Message processing, obtain the voltage of each battery and average voltage, maximum voltage, the minimum voltage of battery cell, and these data are sent to 7 cun of liquid crystal display screens and show.The equalizing voltage value of the voltage of each battery and setting compares by assembly controller, determine whether send equalizing signal by CAN to corresponding piece controller, if certain piece controller receives the equalizing signal from assembly controller, the equalizing circuit starting self is carried out the equilibrium of battery electric quantity.In addition, assembly controller can also pass through input key, the over voltage alarm value of initialization system, undervoltage warning value and carry out the switching of 7 cun of liquid crystal display screen display interfaces.
The single-chip microcomputer that described piece controller adopts is STM32F103C8T6.
Described CAN interface have employed CAN transceiver PCA82C250, CAN isolator ADUM1201 and three terminal integrated voltage stabilizer 7805.
Described equalizing circuit have employed field effect transistor FDS4465 as switch; It is 1 ohm that equalizing resistance have employed resistance, and power is the cement resistor of 5W.
Described voltage collection circuit have employed high-precision Voltage Reference chip LM385BD_2.5, and its divided fraction have employed the precision resistance of 0.01% precision.
The microcontroller that described assembly controller adopts is STM32F103ZET6.
What 7 described inch liquid crystal screens adopted is 800*600 graphic dot matrix, true color liquid crystal display screen.
The utility model lithium-ions battery group voltage detecting and balance control system are owing to have employed such scheme, make it compared with present technology, there is following advantage: by being equipped with a set of independent piece controller to each cell, separate between each piece controller, carry out the exchange of data by means of only the communication bus of isolating and assembly controller, realize the detection of each monomer battery voltage of battery pack.The method circuit structure is succinct, certainty of measurement is high, antijamming capability is strong, flexibility is good.Energy unnecessary in cell, by every block cell parallel equalizing resistance of battery pack, is consumed with the form of heat energy by resistance by equalizing sections, reaches balanced object, and the battery capacity realizing battery pack is unified.This equalization methods structural design is simple, is easy to realize, and with low cost.
Accompanying drawing explanation
Fig. 1 is internal structure schematic diagram of the present utility model.
In figure: 1-piece controller; 2-CAN bus; 3-assembly controller.
Fig. 2 is voltage collection circuit figure.
Fig. 3 is equalizing circuit figure.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail.
With reference to figure 1, a kind of lithium-ions battery group voltage detecting and balance control system, comprise assembly controller 1, CAN 2 and piece controller 3.Wherein, assembly controller 1 comprises CAN interface, microcontroller, 7 cun of liquid crystal display screens, alarm and input keys; Piece controller 3 comprises voltage collection circuit, equalizing circuit, single-chip microcomputer and CAN interface.In the utility model, every block lithium-ions battery is equipped with a piece controller 3, and the detection of each piece controller 3 complete independently cell voltage and balanced control, each piece controller 3 is connected with assembly controller 1 by CAN.After the information of voltage that assembly controller 1 pair of piece controller 3 sends processes, the tasks such as corresponding display, warning can be completed.Meanwhile, the equalizing voltage value of the cell voltage that each piece controller 3 also gathers by assembly controller 1 and setting compares, and judges whether to send equalizing signal to piece controller 3.Voltage detection method is directly recorded by the AD converter of piece controller 3 single-chip microcomputer inside after adopting precision resistance dividing potential drop.Energy unnecessary in cell, by every block cell parallel equalizing resistance of battery pack, is consumed with the form of heat energy by resistance by equalizing sections, reaches balanced object.Piece controller 3, by voltage collection circuit, gathers the voltage of corresponding cell, and its single-chip microcomputer, by after the cell voltage process that collects, is sent in CAN network with the form of voltage message by the CAN interface of self.Assembly controller 1 passes through the voltage message that in the CAN interface CAN network of self, each piece controller 3 sends, microcontroller is to after voltage Message processing, obtain the voltage of each battery and average voltage, maximum voltage, the minimum voltage of battery cell, and these data are sent to 7 cun of liquid crystal display screens and show.The equalizing voltage value of the voltage of each battery and setting compares by assembly controller 1, determine whether send equalizing signal by CAN to corresponding piece controller 3, if certain piece controller 3 receives the equalizing signal from assembly controller 1, the equalizing circuit starting self is carried out the equilibrium of battery electric quantity.In addition, assembly controller 1 can also pass through input key, the over voltage alarm value of initialization system, undervoltage warning value and carry out the switching of 7 cun of liquid crystal display screen display interfaces.
With reference to figure 2, the principle of voltage collection circuit is as follows: for improving the precision that system voltage gathers, employ a high-precision reference voltage chip LM385BD_2.5 in voltage collection circuit, this chip exports high-precision 2.5V reference voltage V in circuit
ref, after this reference voltage is measured by an ALT-CH alternate channel of inner 12 bit A/D converters of STM32F103C8T6 single-chip microcomputer, the digital value that can obtain after its AD conversion is AD
ref.After the bleeder circuit dividing potential drop that the terminal voltage of battery consists of precision resistance R10 and R13, obtain the voltage V of actual measurement
bat, this voltage is measured by another paths of inner 12 bit A/D converters of STM32F103C8T6 single-chip microcomputer, and the digital value that single-chip microcomputer records after its AD conversion is AD
bat.According to the linear relation V of AD sampling
bat/ AD
bat=V
ref/ AD
ref, the magnitude of voltage V of actual measurement after the dividing potential drop asked
bat, then according to dividing potential drop coefficient and then the magnitude of voltage of trying to achieve detection battery.
With reference to figure 3, equalizing circuit is by controlling turning on and off of field effect transistor FDS4465, realizes balanced opening and closing.The grid of field effect transistor FDS4465 is connected with STM32F103C8T6 single-chip I/O mouth, and single-chip microcomputer, by exporting the PWM balanced drive signal of different duty, controls field effect transistor and opens turn-off speed, produce the euqalizing current of different size, control balanced speed.In balancing procedure, energy unnecessary in battery, consumes by equalizing resistance R5 with the form of heat energy.
The part do not related in aforesaid way is taked or uses for reference prior art to realize.
Above-mentioned explanation to disclosed utility model: under the instruction of this specification, any equivalents that professional and technical personnel in the field make, or obvious variant, all in protection range of the present utility model.
Claims (1)
1. lithium-ions battery group voltage detecting and a balance control system, is characterized in that: comprise assembly controller, CAN and piece controller; Wherein, assembly controller comprises CAN interface, microcontroller, 7 cun of liquid crystal display screens, alarm and input keys; Piece controller comprises voltage collection circuit, equalizing circuit, single-chip microcomputer and CAN interface; Every block lithium-ions battery is equipped with a piece controller, and each detection of piece controller complete independently cell voltage and the equilibrium of battery electric quantity, each piece controller is connected with assembly controller by CAN.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374341.0U CN204103518U (en) | 2014-07-08 | 2014-07-08 | Lithium-ions battery group voltage detecting and balance control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420374341.0U CN204103518U (en) | 2014-07-08 | 2014-07-08 | Lithium-ions battery group voltage detecting and balance control system |
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| Publication Number | Publication Date |
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| CN204103518U true CN204103518U (en) | 2015-01-14 |
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| CN201420374341.0U Expired - Fee Related CN204103518U (en) | 2014-07-08 | 2014-07-08 | Lithium-ions battery group voltage detecting and balance control system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223517A (en) * | 2015-11-11 | 2016-01-06 | 国网黑龙江省电力有限公司绥化供电公司 | The online balanced monitoring method of a kind of battery pack |
| CN105406551A (en) * | 2015-12-23 | 2016-03-16 | 桂林信通科技有限公司 | On-line monitor and monitoring device having equilibrium function of monomer storage battery |
| CN107482726A (en) * | 2017-09-01 | 2017-12-15 | 代冰涛 | A kind of active battery charge equalization apparatus of multipurpose multichannel |
| CN108284762A (en) * | 2018-01-23 | 2018-07-17 | 苏州妙益科技股份有限公司 | A kind of power battery pack management system |
| CN109387785A (en) * | 2018-12-05 | 2019-02-26 | 东莞博力威电池有限公司 | A kind of single-unit System of voltage acquisition of multi-string battery group |
-
2014
- 2014-07-08 CN CN201420374341.0U patent/CN204103518U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105223517A (en) * | 2015-11-11 | 2016-01-06 | 国网黑龙江省电力有限公司绥化供电公司 | The online balanced monitoring method of a kind of battery pack |
| CN105406551A (en) * | 2015-12-23 | 2016-03-16 | 桂林信通科技有限公司 | On-line monitor and monitoring device having equilibrium function of monomer storage battery |
| CN107482726A (en) * | 2017-09-01 | 2017-12-15 | 代冰涛 | A kind of active battery charge equalization apparatus of multipurpose multichannel |
| CN108284762A (en) * | 2018-01-23 | 2018-07-17 | 苏州妙益科技股份有限公司 | A kind of power battery pack management system |
| CN109387785A (en) * | 2018-12-05 | 2019-02-26 | 东莞博力威电池有限公司 | A kind of single-unit System of voltage acquisition of multi-string battery group |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150114 Termination date: 20150708 |
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| EXPY | Termination of patent right or utility model |