CN204597578U - A kind of serial lithium battery management system used for electric vehicle - Google Patents
A kind of serial lithium battery management system used for electric vehicle Download PDFInfo
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- CN204597578U CN204597578U CN201520334636.XU CN201520334636U CN204597578U CN 204597578 U CN204597578 U CN 204597578U CN 201520334636 U CN201520334636 U CN 201520334636U CN 204597578 U CN204597578 U CN 204597578U
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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
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The utility model provides a kind of serial lithium battery management system used for electric vehicle, and management system comprises main controller module, battery pack control module, battery voltage sensing module, battery current detection module, data-storing module, temperature control module, display module, alarm module, power module and energy supply control module.Native system and management method thereof enough realize the voltage of whole lithium battery system, current acquisition, battery temperature control; Each battery pack control module has monomer battery voltage and temperature acquisition, balance charge/discharge controlling functions, system can be identified battery that in power brick, other battery pressure reduction is excessive and be realized the consistency of cell capacity by charge-discharge control circuit, cell is avoided to overcharge or charge less, reach lithium battery group balance charge/discharge, according to the history value estimation useful life of cell of voltage, charging or discharging current, temperature parameter and the matching degree with power brick, guarantee that lithium battery system is long-acting, run safely.
Description
Technical field
The utility model relates to a kind of lithium battery technical field of power management, particularly one serial lithium battery management system used for electric vehicle.
Background technology
Cell series connection uses the output voltage that can improve battery pack, and in parallel use can obtain larger battery capacity.In Prospect of EVS Powered with Batteries group, improving battery pack output voltage can increase system efficiency, thus reduces the total cost of electric automobile.Because the low and finite capacity of the voltage of cell, therefore, by adopting some cell connection in series-parallel thus the method obtaining high voltage large capcity battery pack generally adopts in vapour Vehicular dynamic battery.The state quality of cell and life-span length affect the quality of car load energy.In the electrokinetic cell use procedure of electric automobile, cell is unbalanced is the key factor affecting battery pack work, and it is very necessary for therefore carrying out Balance route to battery pack.
Chinese patent 101814754A discloses a kind of power supply management system for lithium battery pack, adopts two-way control model, to charging valve with put field tube and control, can increase stability and the control precision of system.
Chinese patent 201110421975.8 discloses a kind of lithium cell charging method for managing power supply and system, the lithium battery voltage detected when can power on according to input power determines whether charging, charging is stopped when exceeding 10% of battery rated voltage when charging, and a kind of charging system is provided, can avoid because lithium battery is by frequent charge be in full capacity state for a long time and affect life-span of battery.
Chinese patent 201110335313.9 discloses a kind of management system for lithium-ion battery pack of electric vehicle, is also to adopt main control unit to add the form of bottom control unit, and its patent content is more prone to control the measurement circuit design of cell and equalizing charge.
In existing battery management system, most invention is aimed at the balance charge/discharge technology of the voltage of cell, current detection technology and whole battery pack.Lack the research of the estimating and forecasting to battery life; Lack and the control for battery management system each several part power supply is studied; Lack the research of the matching degree to cells all in whole battery pack.
The purpose of this utility model is the blank for filling up above-mentioned prior art, provides a kind of serial lithium battery management system used for electric vehicle.
Utility model content
The utility model technical issues that need to address are electric vehicle serial lithium battery management systems, that is: provide a kind of host-guest architecture all based on the control system of Freescale single-chip microcomputer, can realize more accurately estimating cell capacity on the basis that monomer battery voltage, electric current, temperature are accurately measured, thus the balance charge/discharge realizing battery controls; On the basis accurately measured based on hardware, software systems can calculate the matching degree of cell in whole battery pack and estimate useful life of battery.
For achieving the above object, the technical scheme that the utility model adopts is: a kind of serial lithium battery management system used for electric vehicle, comprises main controller module, 8 battery pack control modules, battery voltage sensing module, battery current detection module, temperature control module, display module, alarm module, power module and energy supply control modules.
The maximum magnitude of described serial lithium battery management system applicable object used for electric vehicle is the battery system that 88 joint single lithium battery are composed in series, and wherein 88 joint single lithium battery form 8 lithium battery groups, and each lithium battery group is composed in series by 11 joint cells.
Further, described main controller module, with CAN interface, is interconnected by function CAN communication pin with 8 battery pack control modules, realizes the exchanges data of multiple controller.
Further, described main controller module and display module are interconnected by functional pin, under running state of electric motor car and battery system charging and discharging state, can be presented on screen by the charged state of the nuclear power state of whole battery system and each cell, user can pass through the matching degree of query by screen battery and the situation in useful life of battery.
Further, the PTD pin of described main controller module and the functional pin of temperature control module are interconnected, and start air cooling equipment in real time, realize the dangerous situation that control battery occurs because heating causes temperature too high in charge and discharge process.
Further, described main controller module and alarm module are interconnected by functional pin, realize short circuit, the battery life limit and battery charging and discharging time the warning function of special circumstances that occurs, adopt the form of sound and light alarm in the utility model.
Further, described main controller module and power module are interconnected by functional pin, be embodied as the function that main controller module and other accessory circuit are powered, power supply is provided by battery pack or car band storage battery, specifically to switch and control mode is realized by energy supply control module.
Further, described main controller module and energy supply control module are interconnected by functional pin, energy supply control module realizes the selection function between battery pack and car band storage battery by commutation circuit, and is realized under dead ship condition the uninterrupted arousal function of main controller module by logical circuit.
Further, described energy supply control module is interconnected by pin by relay switch and power module, realizes the switching to power module and switching function.
Further, described each battery pack control module comprises battery controller, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module and communication module.
Further, described battery controller and handover module are interconnected by functional pin, realize the discharge and recharge selection function to single battery by relay matrix and optocoupler.
Further, described battery controller is interconnected by functional pin and sampling module with cell temperature detecting module, monomer battery voltage detection module and battery pack current detection module respectively, realize cell temperature and the measurement sampling of voltage and the detection sampling functions of battery pack current, for estimating battery capacity provides reliable data basis, guarantee that battery charge and discharge process safely, accurately.
Further, described battery controller and charge-discharge modules are interconnected by pin, realize to the switching function in cell charge and discharge process.
Further, described battery controller and communication module are interconnected by pin, complete the CAN communication function with main controller module.
Further, described handover module, monomer battery voltage detection module and charge-discharge modules are interconnected by wire with the both positive and negative polarity of each cell of this group respectively.
Further, described energy supply control module is made up of electrical source exchange module, logical circuit, 12-12DC/DC modules A, 12-12DC/DC module B, 12-5C/DC modules A, 12-5DC/DC module B, 12-5DC/DC module C, 12-5DC/DC module D.
Further, described electrical source exchange module is connected with Vehicular accumulator cell, power brick and 12-12DC/DC modules A, 12-12DC/DC module B, 12-5C/DC modules A, 12-5DC/DC module B respectively, and for each battery pack control module respectively produces the voltage of two class 12V and 5V under the effect of main controller module control signal CRL1.
Further, described 12-5DC/DC module C, 12-5DC/DC module D are connected by wire with Vehicular accumulator cell, and for main control module produces the voltage of two class 5V under the control signal effect of logical circuit generation.
Further, described logical circuit is under the effect of main controller module control signal CRL2, CRL3 and CRL4, produce logic control signal CRL5, CRL6, CRL7 and CRL8, wherein CRL5, CRL6 are respectively used to the arousal function of main controller module and coupled data memory, CRL7 and CRL8 is respectively used to the logic control of two class 5V voltages.
Accompanying drawing explanation
Accompanying drawing is used to provide further understanding of the present utility model, and forms a part for specification, is used from explanation the utility model, does not form restriction of the present utility model with embodiment one of the present utility model.
Fig. 1 is the serial lithium battery management system general structure block diagram used for electric vehicle that the utility model proposes.
Fig. 2 is the structured flowchart of the battery pack control module that the utility model proposes.
Fig. 3 is the structured flowchart of the energy supply control module that the utility model proposes.
Fig. 4 is the main process figure of the battery management system that the utility model proposes.
Embodiment
Below in conjunction with accompanying drawing, preferred embodiment of the present utility model is described, should be appreciated that preferred embodiment described herein is only for instruction and explanation of the utility model, and be not used in restriction the utility model.
Fig. 1 is serial lithium battery management system general structure block diagram used for electric vehicle, and it comprises main controller module, 8 battery pack control modules, battery voltage sensing module, battery current detection module, data-storing module, temperature control module, display module, alarm module, power module and energy supply control modules.
When after electric automobile igniting, main controller module switches to power brick by energy supply control module and opening power module is powered to each battery pack control module; Magnitude of voltage and the discharging current of whole power brick is gathered according to certain sampling period by battery voltage sensing module and battery current detection module, if power brick voltage is down to below rated voltage, then send sound and light alarm by alarm module, in the lcd screen of display module, show relevant information simultaneously; Simultaneously, main controller module carries out real time communication by CAN and 8 battery pack control modules, receive the terminal voltage of each cell, discharging current, temperature signal, and by the data-storing of all receptions in data-storing module, carry out SOC estimation in real time, control basis for battery balanced charge-discharge modules provides, carry out battery matching degree with Time Controller according to this three classes historical data and analyze and battery estimation; When each cell temperature value received by CAN exceedes set point, main controller module will trigger temperature control module and start air cooler; If the voltage of each cell received by CAN or discharge current value occur abnormal, then send sound and light alarm by alarm module, and lcd screen shows relevant information, all abnormal information codes will be kept in data memory module.
After electric automobile is flame-out, main controller module determines whether the cell charging needing to be less than set point to capacity according to the historical data of storage.If need charging, then switch to Vehicular accumulator cell to power to each battery pack control module and to carry out equalizing charge among a small circle by energy supply control module, and store the information such as voltage, electric current, charging interval; If do not need equalizing charge, then cut off each battery pack control module power supply, main controller module enters timing wake-up pattern.
Fig. 2 is battery pack control module structured flowchart, and it comprises battery controller, sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module and communication module.
Main controller module powers on to battery pack control module, after system initialization, temperature, voltage, the charging and discharging currents value of 11 cells is measured in real time by cell temperature detection, monomer battery voltage detection module, battery pack current detection module, battery controller then by the measured value described in sampling module acquisition time, and sends to main controller module by communication module with CAN form; After battery controller receives the discharge and recharge instruction of main controller module, select by the relay matrix controlled in handover module the cell needing discharge and recharge, and to open charge-discharge modules function be that cell carries out balance charge/discharge.
Fig. 3 is the structured flowchart of energy supply control module, comprises electrical source exchange module, logical circuit, 12-12DC/DC modules A, 12-12DC/DC module B, 12-5C/DC modules A, 12-5DC/DC module B, 12-5DC/DC module C, 12-5DC/DC module D.
Battery management system power supply comes from Vehicular accumulator cell or power brick, and energy supply control module is embodied as main controller module and each battery pack control module is selected or the function of Switching Power Supply.After electric automobile igniting, main controller module is by control signal CRL1 triggering voltage handover module, select power brick power supply and provide 12-12DC/DC modules A, 12-12DC/DC module B, 12-5C/DC modules A, 12-5DC/DC module B tetra-kinds of power supplys for each battery pack control module, wherein 12-12DC/DC modules A, 12-12DC/DC module B is respectively sampling module and relay provides power supply, 12-5C/DC modules A, 12-5DC/DC module are respectively reference voltage and the operating voltage that battery pack control module provides 5V; If do not need the equalizing charge of each several part cell after electric automobile is flame-out, then main controller module closes the power supply of each battery pack control module by CRL1, if need to carry out equalizing charge, then electrical source exchange model choice storage battery provides power supply for each battery pack control module; Vehicular accumulator cell is always main controller module and provides two class 5V power supply 12-5DC/DC module C, 12-5DC/DC module D; Under electric automobile is afterwards flame-out and cell does not need balance charge/discharge situation, main controller module enters timing wake-up pattern, logical circuit is under the effect of main controller module control signal CRL2, CRL3 and CRL4, produce logic control signal CRL5, CRL6, CRL7 and CRL8, wherein CRL5, CRL6 are respectively used to the arousal function of main controller module and coupled data-storing module, CRL7 and CRL8 is respectively used to the logic control of two class 5V voltages.
Fig. 4 is the main process figure of the management method of the battery management system that the utility model proposes, and specifically comprises the steps:
S1: carry out initialization after system electrification;
S2: first judge whether battery enters charged state, if start charging, then performs S3, if not charged state, then performs S4;
S3: start to record the charging interval of all cells, charging current, the voltage at battery two ends the charging times of cumulative battery and total charging interval, data are supplied to S13 simultaneously;
S4: judge whether battery enters discharge condition, if start electric discharge, then performs S5, if not discharge condition, then turns back to S2;
S5: start to record the discharge time of all cells, discharging current, the voltage at battery two ends the discharge time of cumulative battery and total discharge time, data are supplied to S13 simultaneously;
S6: call battery capacity estimation subprogram, to the nuclear power state SOC of each battery
iestimate;
S7: the average size calculating all batteries
with the difference of each battery and average size
, data are supplied to S13 simultaneously;
S8: find out and record 5 capacity difference maximum in all batteries
;
S9: by up-to-date 5 capacity difference
compare with 5 in historical record are maximum;
S10: by comparing, judges whether same battery its capacity difference in continuous 5 primary cell discharge and recharges all belongs to 5 maximum differences, if so, then enters S11, data is supplied to S13 simultaneously; If not, then turn back to S8;
S11: call battery matching degree subprogram, calculate the matching degree of battery used, find out unmatched cell;
S12: call display subroutine, shows matching result or battery life estimation result on the lcd screen;
S13: call battery life estimation subprogram, the useful life of prediction battery.
In sum, the serial lithium battery management system used for electric vehicle of the utility model embodiment, its host-guest architecture is all the control system based on Freescale single-chip microcomputer, the basis accurately measured monomer battery voltage, electric current, temperature realizes more accurately estimating cell capacity, and the balance charge/discharge that can realize battery controls; On the basis accurately measured based on hardware, software systems can calculate the matching degree of cell in whole battery pack and the useful life of estimating battery.
Last it is noted that the foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, although be described in detail the utility model with reference to previous embodiment, for a person skilled in the art, it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (8)
1. a serial lithium battery management system used for electric vehicle, comprises main controller module, it is characterized in that:
Described lithium battery management system is also provided with the battery pack control module, battery voltage sensing module, battery current detection module, data-storing module, temperature control module, display module, alarm module, power module and the energy supply control module that are electrically connected with main controller module;
Main controller module is connected battery pack by battery voltage sensing module with battery current detection module, and main controller module is by gathering magnitude of voltage and the discharging current of whole battery pack by battery voltage sensing module and battery current detection module;
Main controller module and battery pack control module are interconnected by function CAN communication pin, main controller module and display module are interconnected by functional pin, main controller module and temperature control module are interconnected by functional pin, main controller module and alarm module are interconnected by functional pin, main controller module and power module are interconnected by functional pin, main controller module and energy supply control module are interconnected by functional pin, energy supply control module is interconnected by functional pin with power module again, energy supply control module realizes energy supply control module under dead ship condition by logical circuit and has uninterrupted arousal function to main controller module, and be that battery pack control module is selected or opens by diverter switch, close power supply, energy supply control module controls switching and the open and close of power module.
2. one according to claim 1 serial lithium battery management system used for electric vehicle, is characterized in that: described battery pack control module is made up of battery controller, sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module, communication module and supply module.
3. one according to claim 2 serial lithium battery management system used for electric vehicle, is characterized in that: described battery controller is interconnected by functional pin and sampling module with cell temperature detecting module, monomer battery voltage detection module and battery pack current detection module respectively; Battery controller and supply module are interconnected by pin, for battery controller provides power supply; Battery controller and charge-discharge modules are interconnected by pin, carry out controlling functions to cell charge and discharge process; Battery controller and communication module are interconnected by pin, and battery pack control module and main controller module are by CAN swap data.
4. one according to claim 3 serial lithium battery management system used for electric vehicle, is characterized in that: described handover module, monomer battery voltage detection module and charge-discharge modules are interconnected by wire with the both positive and negative polarity of each cell of this group respectively.
5. the serial lithium battery management system used for electric vehicle of the one according to the arbitrary claim of Claims 1 to 4, it is characterized in that: described battery pack is composed in series by the cell of equal number, battery pack is connected in series composition power brick mutually as power supply used for electric vehicle.
6. one according to claim 5 serial lithium battery management system used for electric vehicle, is characterized in that: described energy supply control module is made up of electrical source exchange module, logical circuit, 12-12DC/DC module, 12-5C/DC module.
7. one according to claim 6 serial lithium battery management system used for electric vehicle, is characterized in that: described 12-12DC/DC module is made up of 12-12DC/DC modules A, 12-12DC/DC module B; Described 12-5C/DC modules A 2-5C/DC modules A, 12-5DC/DC module B, 12-5DC/DC module C, 12-5DC/DC module D form.
8. one according to claim 7 serial lithium battery management system used for electric vehicle, it is characterized in that: electrical source exchange module is connected with Vehicular accumulator cell, power brick and 12-12DC/DC modules A, 12-12DC/DC module B, 12-5C/DC modules A, 12-5DC/DC module B respectively, and for each battery pack control module respectively produces the voltage of two class 12V and 5V under the effect of main controller module control signal CRL1; 12-5DC/DC module C, 12-5DC/DC module D are connected by wire with Vehicular accumulator cell, and for main control module produces the voltage of two class 5V under the control signal effect of logical circuit generation; Logical circuit is under the effect of main controller module control signal CRL2, CRL3 and CRL4, produce logic control signal CRL5, CRL6, CRL7 and CRL8, wherein CRL5, CRL6 are respectively used to the arousal function of main controller module and coupled data memory, CRL7 and CRL8 is respectively used to the logic control of two class 5V voltages.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852435A (en) * | 2015-05-22 | 2015-08-19 | 聊城大学 | Electric automobile serial lithium battery management system and a management method thereof |
| CN105119346A (en) * | 2015-09-22 | 2015-12-02 | 苏州达力客自动化科技有限公司 | Battery charge and discharge system |
| CN106199436A (en) * | 2016-06-24 | 2016-12-07 | 安徽长城输送机械制造有限公司 | A kind of FCS functional check-out set of cell management system of electric automobile |
| CN109638369A (en) * | 2018-12-26 | 2019-04-16 | 无锡锐祺通讯技术有限公司 | Battery pack, control panel arrangement and working method with integrated BMS control panel |
| CN110962685A (en) * | 2019-12-06 | 2020-04-07 | 江西博能上饶客车有限公司 | Battery management system for electric motor coach |
-
2015
- 2015-05-22 CN CN201520334636.XU patent/CN204597578U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104852435A (en) * | 2015-05-22 | 2015-08-19 | 聊城大学 | Electric automobile serial lithium battery management system and a management method thereof |
| CN105119346A (en) * | 2015-09-22 | 2015-12-02 | 苏州达力客自动化科技有限公司 | Battery charge and discharge system |
| CN106199436A (en) * | 2016-06-24 | 2016-12-07 | 安徽长城输送机械制造有限公司 | A kind of FCS functional check-out set of cell management system of electric automobile |
| CN109638369A (en) * | 2018-12-26 | 2019-04-16 | 无锡锐祺通讯技术有限公司 | Battery pack, control panel arrangement and working method with integrated BMS control panel |
| CN109638369B (en) * | 2018-12-26 | 2021-06-04 | 无锡锐祺通讯技术有限公司 | Battery pack with integrated BMS control board, control board arrangement and operating method |
| CN110962685A (en) * | 2019-12-06 | 2020-04-07 | 江西博能上饶客车有限公司 | Battery management system for electric motor coach |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150826 Termination date: 20160522 |