CN204712888U - A kind of batteries of electric automobile group control module - Google Patents
A kind of batteries of electric automobile group control module Download PDFInfo
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- CN204712888U CN204712888U CN201520334142.1U CN201520334142U CN204712888U CN 204712888 U CN204712888 U CN 204712888U CN 201520334142 U CN201520334142 U CN 201520334142U CN 204712888 U CN204712888 U CN 204712888U
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. batteries
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/16—Information or communication technologies improving the operation of electric vehicles
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Abstract
The utility model provides a kind of batteries of electric automobile group control module, comprise battery controller, control module is provided with the sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module, communication module and the supply module that are electrically connected with battery controller.This battery pack control module can realize more accurately estimating cell capacity on the basis accurately measured monomer battery voltage, electric current, temperature, thus the balance charge/discharge realizing battery controls; On the basis accurately measured based on hardware, software system can calculate the matching degree of cell in whole battery pack and estimate service life of battery.
Description
Technical field
The utility model relates to a kind of lithium cell technical field of power management, particularly a kind of batteries of electric automobile group control module.
Background technology
Cell series connection uses the output voltage that can improve battery pack, and in parallel use can obtain larger capacity of cell.In Prospect of EVS Powered with Batteries group, improving battery pack output voltage can increase system efficiency, thus reduces the total cost of electronlmobil.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 electronlmobil, 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 master mode, to charging tube with put field tube and control, can increase stability and the control accuracy 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 charge system is provided, can avoid because lithium cell 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 batteries of electric automobile group control module.
Utility model content
The utility model technical issues that need to address are to provide a kind of batteries of electric automobile group control module, this module is used for design and assembly electric vehicle serial lithium battery management system, can realize more accurately estimating cell capacity on the basis accurately measured monomer battery voltage, electric current, temperature, thus the balance charge/discharge realizing battery controls; On the basis accurately measured based on hardware, software system can calculate the matching degree of cell in whole battery pack and estimate service life of battery.
For achieving the above object, the technical scheme that the utility model adopts is:
A kind of batteries of electric automobile group control module, comprise battery controller, described control module is provided with the sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module, communication module and the supply module that are electrically connected with battery controller.
This battery pack control module is electrically connected with main controller 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 observed reading 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.This battery pack control module can realize more accurately estimating cell capacity on the basis accurately measured monomer battery voltage, electric current, temperature, thus the balance charge/discharge realizing battery controls; On the basis accurately measured based on hardware, software system can calculate the matching degree of cell in whole battery pack and estimate service life of battery.
As the further improvement to the technical program, 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, to cell temperature, voltage, the sampling of battery set charge/discharge current detecting; 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 exchange data by CAN.
As the further improvement to the technical program, 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.
As the further improvement to the technical program, described battery pack is composed in series by the cell of equal number, and battery pack is connected in series composition power brick mutually as power supply used for electric vehicle.
The one serial lithium battery management system used for electric vehicle of this battery pack control module composition, 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.
Annexation and the effect of above-mentioned serial lithium battery management system modules a kind of used for electric vehicle are as follows:
The maximum range of 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 cell groups, and each lithium cell group is composed in series by 11 joint cells.
Main controller module, with CAN interface, is interconnected by function CAN communication pin with 8 battery pack control modules, realizes the data exchange of multiple controller.
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 charge condition 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 service life of battery.
The PTD pin of 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.
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 extraordinary circumstances that occurs, adopt the form of sound and light alarm in the present invention.
Main controller module and power module are interconnected by functional pin, and 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 mode is realized by energy supply control module.
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 decision circuit.
Energy supply control module is interconnected by pin by relay switch and power module, realizes the switching to power module and switching function.
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.
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.
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 failure-free data basis, guarantee that battery charge and discharge process safely, accurately.
Battery controller and charge-discharge modules are interconnected by pin, realize to the switching function in cell charge and discharge process.
Battery controller and communication module are interconnected by pin, complete the CAN communication function with main controller module.
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.
Energy supply control module is made up of electrical source exchange module, decision 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.
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 decision circuit generation.
Described decision 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 a further understanding of the present invention, and forms a part for specification sheets, is used from explanation the utility model, does not form restriction of the present utility model with embodiment one of the present utility model.
The structured flowchart of Fig. 1 battery pack control module of the present utility model.
Fig. 2 utilizes the battery pack control module of Fig. 1 to assemble lithium battery management system overall structure block diagram.
Fig. 3 is the structured flowchart of energy supply control module in Fig. 2.
Fig. 4 is the workflow diagram of the battery management system of Fig. 2.
Detailed description of the invention
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.
It is the novel a kind of batteries of electric automobile group control module of the utility model shown in Fig. 1, comprise battery controller, described control module is provided with the sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module, communication module and the supply module that are electrically connected with battery controller.
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, to cell temperature, voltage, the sampling of battery set charge/discharge current detecting; 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 exchange data by CAN.
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.
Described battery pack is composed in series by the cell of equal number, and battery pack is connected in series composition power brick mutually as power supply used for electric vehicle.
Fig. 2 utilizes the battery pack control module of Fig. 1 to assemble lithium battery management system overall structure block diagram, 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 discharge 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 for Power by CAN and 8 battery pack control modules, receive the terminal voltage of each cell, discharge 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 setting value, 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 electronlmobil is flame-out, main controller module determines whether the cell charging needing to be less than setting value 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 duration; If do not need equalizing charge, then cut off each battery pack control module power supply, main controller module enters timing wake-up pattern.
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 observed reading 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 utilize battery pack control module of the present utility model assemble the structured flowchart of the energy supply control module that lithium battery management system is applied, comprise electrical source exchange module, decision 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 electronlmobil 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 VREF (Voltage Reference) and the operating voltage that battery pack control module provides 5V; If do not need the equalizing charge of each several part cell after electronlmobil 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 electronlmobil is afterwards flame-out and cell does not need balance charge/discharge situation, main controller module enters timing wake-up pattern, decision 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 battery management system of the utility model battery pack control module composition, specifically comprises the steps:
S1: carry out initialization after system electrification;
S2: first judge whether battery enters charge condition, if start charging, then performs S3, if not charge condition, then performs S4;
S3: start to record the charging duration of all cells, charging current, the voltage at battery two ends the charging times of cumulative battery and total charging duration, data are supplied to S13 simultaneously;
S4: judge whether battery enters discharge regime, if start electric discharge, then performs S5, if not discharge regime, then turns back to S2;
S5: start to record the discharge time of all cells, discharge 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 capacity of cell 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 historic records 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 service life of prediction battery.
In sum, the serial lithium battery management system used for electric vehicle of the embodiment of the present invention, 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 system can calculate the matching degree of cell in whole battery pack and the service life of estimating battery.
Last it is noted that the foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, although with reference to previous embodiment to invention has been detailed description, 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.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. a batteries of electric automobile group control module, comprise battery controller, it is characterized in that: described control module is provided with the sampling module, handover module, charge-discharge modules, cell temperature detecting module, monomer battery voltage detection module, battery pack current detection module, communication module and the supply module that are electrically connected with battery controller;
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, to cell temperature, voltage, the sampling of battery set charge/discharge current detecting; 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 exchange data by CAN;
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.
2. a kind of batteries of electric automobile group control module according to claim 1, is characterized in that: described battery pack is composed in series by the cell of equal number, and battery pack is connected in series composition power brick mutually as power supply used for electric vehicle.
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| CN201520334142.1U CN204712888U (en) | 2015-05-22 | 2015-05-22 | A kind of batteries of electric automobile group control module |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281408A (en) * | 2015-11-25 | 2016-01-27 | 上海工程技术大学 | Method for equally charging battery management system |
| CN105470555A (en) * | 2016-01-26 | 2016-04-06 | 宁波市北仑海伯精密机械制造有限公司 | Power battery pack structure and management method thereof |
| CN105620291A (en) * | 2015-12-25 | 2016-06-01 | 北京新能源汽车股份有限公司 | Method, equipment and device for detecting battery voltage and battery management system |
| CN110816311A (en) * | 2018-08-08 | 2020-02-21 | 罗伯特·博世有限公司 | Method for operating a battery pack system and electric vehicle |
-
2015
- 2015-05-22 CN CN201520334142.1U patent/CN204712888U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105281408A (en) * | 2015-11-25 | 2016-01-27 | 上海工程技术大学 | Method for equally charging battery management system |
| CN105620291A (en) * | 2015-12-25 | 2016-06-01 | 北京新能源汽车股份有限公司 | Method, equipment and device for detecting battery voltage and battery management system |
| CN105620291B (en) * | 2015-12-25 | 2018-03-23 | 北京新能源汽车股份有限公司 | Method, equipment and device for detecting battery voltage and battery management system |
| CN105470555A (en) * | 2016-01-26 | 2016-04-06 | 宁波市北仑海伯精密机械制造有限公司 | Power battery pack structure and management method thereof |
| CN105470555B (en) * | 2016-01-26 | 2019-04-19 | 宁波市北仑海伯精密机械制造有限公司 | A kind of power battery pack structure and its management method |
| CN110816311A (en) * | 2018-08-08 | 2020-02-21 | 罗伯特·博世有限公司 | Method for operating a battery pack system and electric vehicle |
| CN110816311B (en) * | 2018-08-08 | 2024-05-28 | 罗伯特·博世有限公司 | Method for operating a battery system and electric vehicle |
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