CN203039043U - Detection and maintenance system for power battery of electric vehicle - Google Patents

Detection and maintenance system for power battery of electric vehicle Download PDF

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Publication number
CN203039043U
CN203039043U CN2013200067939U CN201320006793U CN203039043U CN 203039043 U CN203039043 U CN 203039043U CN 2013200067939 U CN2013200067939 U CN 2013200067939U CN 201320006793 U CN201320006793 U CN 201320006793U CN 203039043 U CN203039043 U CN 203039043U
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China
Prior art keywords
battery
maintenance
detection
data
network switch
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CN2013200067939U
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Chinese (zh)
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温家鹏
冯韬
李威
宋修明
路其龙
张计涛
刘军
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北京优科利尔能源设备有限公司
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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 utility model discloses a detection and maintenance system for a power battery of an electric vehicle. The detection and maintenance system for the power battery of the electric vehicle includes a monitoring system, a CAN (controller area network)-Ethernet gateway and a battery testing and maintenance unit. The monitoring system includes a remote network switch, a local network switch, a remote scheduling server, a data access server, a network printer, a monitoring computer, a data server and a firewall; and the battery testing and maintenance unit comprises a battery charging and discharging device, a balancer and a data acquisition system. The detection and maintenance system for the power battery of the electric vehicle has the advantages of being capable of effectively completing the detection of basic electric functions of a battery pack; obtaining various objective evaluation indexes of the battery pack by reasonably computing parameters, such as capacity, internal resistance, polarization and consistency of a single battery and the battery pack; being capable of effectively subjecting the battery pack to be detected to the fault location and the screen and rejection of an abnormal single battery and the equalization maintenance; and having a relatively high and wide practical value.

Description

A kind of detection and maintenance system for electric automobile power battery
Technical field
The utility model relates to a kind of detection for electric automobile power battery and maintenance system, belongs to the battery technology field.
Background technology
At present, follow the development of electric automobile, power battery technology has also obtained certain progress, and energy density is higher, and volume is littler, and the more lithium-ion-power cell of cycle-index becomes numerous automobile vendors preferred electric automobile important motivity source.Yet the increase along with the application scenario, in practice process, find, the electrokinetic cell output characteristic is subjected to ambient temperature, it is bigger to discharge and recharge factor affecting such as condition, especially after the electrokinetic cell connection in series-parallel in groups, inconsistency difference between the monomer causes whole Battery pack to descend in aspect performances such as cycle-index, power outputs, can't satisfy the requirement of application scenarios such as electric automobile, energy-storage system.
Periodic inspection and maintenance issues at electrokinetic cell after the electric automobile large-scale development; for being made, electric property, output performance and the consistency of whole Battery pack judge and evaluation; whether prompting battery producer or car operation unit cells need to be serviced, and judge whether battery performance can continue to be applied to electric automobile.Therefore electrokinetic cell detection and maintenance system are essential, and its large-scale development for motor vehicle provides technical guarantee, has also created condition for more reasonable, economic use electrokinetic cell.
Electrokinetic cell detects and the core technology of maintenance system mainly comprises high-power high-accuracy AC/DC converter technology and electrokinetic cell software systems and two aspects of assessment technology.Wherein the battery test apparatus spininess on the present domestic market designs lead-acid battery, is difficult to satisfy the demand of used for electric vehicle lithium-ion-power cell at aspects such as battery capacity, equipment precision, method of testings.And the serious dependence on import of lithium-ion-power cell testing equipment, foreign brand names such as Di Kalong are in occupation of most market shares, be unfavorable for that China has independent intellectual property right in electric automobile lithium-ion-power cell field, and present electrokinetic cell checkout equipment just designs at the testing process of battery, lack maintenance function, maintenance work after can't problem of implementation detecting is so the research lithium-ion-power cell detects and the research work of maintenance system is extremely urgent.
At present,, conversion efficiency big at the electrokinetic cell capacity requires characteristics such as height, and electrokinetic cell detects and maintenance system puts forth effort to develop the efficient two-way DC/DC converter technique of low-voltage, high-current.The first is in conjunction with the electric topology model construction technology of the two-way charging/discharging apparatus of electrokinetic cell load characteristic, and this kind equipment lacks the further investigation of this technology at present; It two is big capacity PWM+DC/DC module parallel technologies.Therefore, when a plurality of modules are in parallel, need average load sharing power, take effective parallel control technology to suppress circulation, thereby can constitute the power-supply system of various power grades flexibly, this kind equipment high power D C/DC parallel technology comprises that the full-digital control technology lacks further investigation and application at present.It three is that PWM+DC/DC coordinates control technology, the high power battery testing equipment of using both at home and abroad adopts the two-stage type structure at present, but two-stage is separate, substantially there is not cooperation, and because the increase of power regime complexity has proposed requirements at the higher level to system responses, therefore need coordinate whole control to front and back according to the output dynamic characteristic; It four is the efficient balancing techniques of electrokinetic cell, the equalizing circuit topological structure of current driving force battery is more, and to adopting little electric current, long vehicle-mounted balanced control strategy, yet because the balanced capacity of vehicle-mounted equalizer is little, can't satisfy the demand of high capacity cell short time equilibrium, also can't cooperate detection system to finish the assessment of cell parameter of consistency and the charge and discharge maintenance of cell.It five is the software control algorithm software of battery detecting and maintenance system, and the software that can finish battery detecting does not at present possess the function that battery is safeguarded automatically.
The utility model content
The purpose of this utility model is to provide a kind of detection and maintenance system of being used for electric automobile power battery that can overcome above-mentioned technical problem, the utility model comprises: supervisory control system, CAN change ethernet gateway and battery testing maintenance unit, and described supervisory control system comprises: telecommunication network switch and local network switch, remote scheduling server, Data Access Server, the network printer, supervisory control comuter, data server, fire compartment wall; Described remote scheduling server, Data Access Server, the network printer, fire compartment wall are connected with the telecommunication network switch respectively, and described supervisory control comuter, data server are connected with the local network switch respectively.
Described battery testing maintenance unit comprises: battery charging and discharging equipment, balancer, data acquisition system; Described data acquisition system comprises synchronous mode battery data harvester, battery management system; Described battery charging and discharging equipment is connected with the CAN bus, described data acquisition system is connected with the CAN bus, described balancer changes ethernet gateway by the CAN bus with CAN and is connected, and described battery testing maintenance unit changes ethernet gateway by CAN and is connected with the local network switch.
Described battery charging and discharging equipment, balancer, data acquisition system are hardware foundation of the present utility model and core, mainly finish the input and output control that the battery testing process discharges and recharges power by the detection of battery output electric property, finish enforcement and the process control of control strategy simultaneously;
Communication bus of the present utility model mainly adopts CAN bus and LAN bus.
Multiple-unit cascade mode of the present utility model is: when a plurality of battery testing maintenance units use simultaneously, then each battery testing maintenance unit is connected with the local network switch by a CAN commentaries on classics ethernet gateway, uses with the cascade that realizes a plurality of battery testing maintenance units.
The utility model is divided execution level, user class and network level by function.Wherein execution level is elementary cell of the present utility model, changeing ethernet gateway by basic battery testing maintenance unit and CAN forms, its hardware actuator mainly finishes the automatic control of testing process, and adopts CAN2.0 to change LAN and finish protocol conversion and data upload; User class of the present utility model mainly is responsible for functions such as monitoring charge and discharge process, fault alarm and the local storage of database, and it comprises supervisory control comuter, local network switch; Network level of the present utility model is responsible for the functions such as remote access of data, mainly is made of telecommunication network switch, remote scheduling server, Data Access Server, the network printer, data server, fire compartment wall, adopts the ICP/IP protocol standard.
Battery status detects elementary tactics: in the numerous parameters that determine battery, whole pool-size, whole group direct current equivalent resistance, monomer DC internal resistance and polarizing voltage platform and repolarization time are several important parameters of sign battery behavior.And for power brick, the electric function of battery pack system and accuracy detection also are the important contents that power brick detects.Consider accuracy and the timeliness of power brick parameter and Function detection or estimation process, therefore can adopt the multiple step format testing process: 1, fast detecting process; 2, safeguard testing process.And the index that can finish detection in these two processes is also incomplete same.
The utility model is shorter owing to detection time in the fast detecting process, therefore, in this process, more to detect electric function and the internal resistance of battery Equivalent DC of power brick: as to comprise communication function, static accuracy verification, dynamic accuracy verification, FCL battery equivalent d.c. resistance, the internal resistance of cell Equivalent DC.
Communication function be control system by with the communication of battery case BMS system, obtain the information such as cell voltage, electric current of its collection, whether test b MS system communication normal.
The static accuracy verification is not have under the situation of electric current discharging and recharging the starting stage, control system is gathered cell voltage, current information by the battery data collecting device, and compare the accuracy of detection of test b MS system with cell voltage, the electric current of battery case BMS system acquisition.
The dynamic accuracy verification is in electrokinetic cell charge-discharge test process, control system is gathered cell voltage, current information by the battery data collecting device, and compare the accuracy of detection of test b MS system with cell voltage, the electric current of battery case BMS system acquisition.
FCL battery equivalent d.c. resistance be control system by with the communication of power range system, in the time of the control charging and discharging currents, obtain every joint monomer battery voltage information, calculate the dc impedance of whole Battery pack.
The internal resistance of cell Equivalent DC be control system by with the communication of power range system, battery acquisition system, in the time of the control charging and discharging currents, obtain every joint monomer battery voltage information, calculate the battery DC internal resistance, thereby judge the individuality that DC internal resistance seriously transfinites.
Conventional sense process of the present utility model refers in the battery use, regularly power brick is carried out Performance Detection and General Maintenance function, mainly be that the battery that goes wrong in the The field process or every interval are charged to flow process of discharge half a year entirely in this process, namely can realize battery capacity, FCL battery equivalent d.c. resistance, the internal resistance of cell Equivalent DC, discharge and recharge polarization platform, consistency of battery pack test item, therefore, in this process, can carry out how performance-relevant detection to power brick to be checked:
Control system of the present utility model by with the communication of power range system, in the time of the control charging and discharging currents, metering power brick capacity is as the actual capacity of power brick; Control system of the present utility model by with the communication of power range system, electric current in the control charge and discharge process, gather the process of charging → leave standstill simultaneously, gather the change in voltage of each cell, obtain voltage recovery time and the amplitude of each batteries simultaneously, as the important indicator of weighing battery polarization voltage.Control system of the present utility model by with the communication of equalizing system, control charge and discharge balancing electric current, gather the information about power of each cell simultaneously, calculate capacity, the SOC diversity factor of cell, and realize what consistency of battery pack was tested as the important indicator of weighing consistency of battery pack.
The utility model is according to the mechanism of this equalizer, the balanced initiatively balanced way that adopts, i.e. and charge balancing pattern, it is as follows that its basis equalization is measured flow process:
(1) conventional balance policy;
The balanced capacity of battery is the storage effect of euqalizing current and time, and the purpose that adopts little current balance is in relatively long charging process (being generally 2-3 hour), continues cell is carried out equilibrium, realizes the miniaturization of equal power volume.
(2) equalization information writing function;
Equalizer cooperates with charger, the relevant information after can storage battery last charging process and charging are finished, before the estimation charging and charging finish after the required charge balancing capacity of each battery.
(3) balanced volume calculation function;
Terminal extreme difference according to cell comes equilibrium, and it is consistent to realize that at last monomer voltage approaches.
The utility model has the advantages that the basic electric function that can finish battery pack efficiently detects; Thereby parameters such as the capacity by reasonable computation battery pack and cell, internal resistance, polarization, consistency provide every objective evaluation index of battery pack; Can carry out unusual cell fault location, screen rejecting and battery pack to be measured is carried out equalized maintenance battery pack to be measured effectively; Have strong and practical value widely.
Description of drawings
Fig. 1 is described in the utility model a kind of for the detection of electric automobile power battery and the overall structure schematic diagram of maintenance system;
Fig. 2 is described in the utility model a kind of for the detection of electric automobile power battery and the workflow diagram of maintenance system.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in detail.As shown in Figure 1, the utility model comprises: supervisory control system, CAN change ethernet gateway 9 and battery testing maintenance unit, and described supervisory control system comprises: telecommunication network switch 1 and local network switch 8, remote scheduling server 3, Data Access Server 4, the network printer 2, supervisory control comuter 7, data server 6, fire compartment wall 5; Described remote scheduling server 3, Data Access Server 4, the network printer 2, fire compartment wall 5 are connected with telecommunication network switch 1 respectively, and described supervisory control comuter 7, data server 6 are connected with local network switch 8 respectively.
Described battery testing maintenance unit comprises: battery charging and discharging equipment 12, balancer 11, data acquisition system 10; Described data acquisition system 10 comprises synchronous mode battery data harvester, battery management system; Described battery charging and discharging equipment 12 is connected with the CAN bus, described data acquisition system 10 is connected with the CAN bus, described balancer 11 changes ethernet gateway 9 by the CAN bus with CAN and is connected, and described battery testing maintenance unit changes ethernet gateway 9 by CAN and is connected with local network switch 8.
As shown in Figure 2, be workflow diagram of the present utility model.Workflow of the present utility model is divided into three steps:
1. system initialization;
After the hardware connection was finished, it is synchronous that hardware system carries out communication, and after synchronizing information was confirmed normally, equipment entered man-machine setting interface flow process, enters the pattern of initially adjusting, and set parameter and the crucial threshold value of initial charge/discharge at the human-computer interaction interface of equipment;
2. battery system detects;
According to artificial selected test item, the output current of control battery charging and discharging equipment 12 and balancer 11, and timed sending discharges and recharges information in charge and discharge process, simultaneously with battery data with discharge and recharge data upload and give described supervisory control system, analyze the battery detecting data, output battery testing result is as the foundation of battery maintenance.
3. battery system is safeguarded;
According to the test result of battery detecting process, battery is carried out consistency maintenance or unusual battery screening rejecting, the power brick after formation maintenance or the reorganization, and the result is safeguarded in output.
Substantially the step that discharges and recharges of the present utility model is as follows:
(1) finishing hardware connects;
(2) system communication synchronous (battery testing maintenance unit and vehicle-mounted BMS set up communication, battery testing maintenance unit and synchronous mode data sampling device and set up communication);
(3) initial parameter adjust (manually importing test item);
(4) testing process begins;
(5) analyze data, the output conclusion;
(6) record or storage testing result;
(7) maintenance process begins;
(8) judge that the consistency of battery pack parameter is whether in prescribed limit;
(9) battery pack is carried out equalized maintenance;
(10) judge that battery pack key property index is whether in prescribed limit;
(11) screening rejecting abnormalities battery;
(12) reorganization battery pack;
(13) the battery pack parameter is demarcated again;
(14) analyze data, the output conclusion;
(14) record or storage system maintenance result.
The above; it only is embodiment of the present utility model; but protection range of the present utility model is not limited thereto; anyly be familiar with those skilled in the art in the utility model scope of disclosure; the variation that can expect easily or replacement all should be encompassed in the protection range of the utility model claim.

Claims (3)

1. detection and maintenance system that is used for electric automobile power battery, it is characterized in that, comprise: supervisory control system, CAN change ethernet gateway and battery testing maintenance unit, and described supervisory control system comprises: telecommunication network switch and local network switch, remote scheduling server, Data Access Server, the network printer, supervisory control comuter, data server, fire compartment wall; Described remote scheduling server, Data Access Server, the network printer, fire compartment wall are connected with the telecommunication network switch respectively, and described supervisory control comuter, data server are connected with the local network switch respectively;
Described battery testing maintenance unit comprises: battery charging and discharging equipment, balancer, data acquisition system; Described battery charging and discharging equipment is connected with the CAN bus, described data acquisition system is connected with the CAN bus, described balancer changes ethernet gateway by the CAN bus with CAN and is connected, and described battery testing maintenance unit changes ethernet gateway by CAN and is connected with the local network switch.
2. a kind of detection and maintenance system for electric automobile power battery according to claim 1 is characterized in that described data acquisition system comprises synchronous mode battery data harvester, battery management system.
3. a kind of detection and maintenance system for electric automobile power battery according to claim 1 is characterized in that, described detection and maintenance system for electric automobile power battery adopts the LAN bus.
CN2013200067939U 2013-01-08 2013-01-08 Detection and maintenance system for power battery of electric vehicle CN203039043U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094633A (en) * 2013-01-08 2013-05-08 北京优科利尔能源设备有限公司 Detecting and maintaining system applied to electromobile power battery
CN106383951A (en) * 2016-09-20 2017-02-08 北京理工大学 Fault diagnosis method and system for electric driven traffic tool
CN107147166A (en) * 2017-05-23 2017-09-08 北京新能源汽车股份有限公司 Circuit of battery pack balancing, method and device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103094633A (en) * 2013-01-08 2013-05-08 北京优科利尔能源设备有限公司 Detecting and maintaining system applied to electromobile power battery
CN103094633B (en) * 2013-01-08 2016-01-27 北京优科利尔能源设备有限公司 A kind of detection for electric automobile power battery and maintenance system
CN106383951A (en) * 2016-09-20 2017-02-08 北京理工大学 Fault diagnosis method and system for electric driven traffic tool
CN106383951B (en) * 2016-09-20 2019-08-06 北京理工大学 A kind of method for diagnosing faults being driven by electricity the vehicles and system
CN107147166A (en) * 2017-05-23 2017-09-08 北京新能源汽车股份有限公司 Circuit of battery pack balancing, method and device
CN107147166B (en) * 2017-05-23 2019-12-17 北京新能源汽车股份有限公司 Battery pack equalization circuit, method and device

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Granted publication date: 20130703

Termination date: 20160108