CN106872902A - The BMS and detection method of a kind of combination of network structure battery - Google Patents

The BMS and detection method of a kind of combination of network structure battery Download PDF

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Publication number
CN106872902A
CN106872902A CN201710094256.7A CN201710094256A CN106872902A CN 106872902 A CN106872902 A CN 106872902A CN 201710094256 A CN201710094256 A CN 201710094256A CN 106872902 A CN106872902 A CN 106872902A
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CN
China
Prior art keywords
battery
bms
combination
network structure
battery strings
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Pending
Application number
CN201710094256.7A
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Chinese (zh)
Inventor
宁宏军
段万普
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Henan Henan Qingxin Energy Industry Co Ltd
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Henan Henan Qingxin Energy Industry Co Ltd
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Priority to CN201710094256.7A priority Critical patent/CN106872902A/en
Publication of CN106872902A publication Critical patent/CN106872902A/en
Pending legal-status Critical Current

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/396Acquisition or processing of data for testing or for monitoring individual cells or groups of cells within a battery
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60LPROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
    • B60L58/00Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
    • B60L58/10Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3842Arrangements for monitoring battery or accumulator variables, e.g. SoC combining voltage and current measurements
    • 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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/70Energy storage systems for electromobility, e.g. batteries
    • 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
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10Technologies relating to charging of electric vehicles
    • Y02T90/16Information or communication technologies improving the operation of electric vehicles

Abstract

The present invention relates to the BMS and detection method of a kind of combination of network structure battery, it is designed for combination of network structure battery structure, whether the detection of combination of network structure, according to the difference that electric current between battery strings is distributed, judges batteries in rational state according to the current data for being battery strings;Whole group battery is synthesized with N string batteries, gathers the output current A of every a string of batteries, just obtains A1~ANData, compare its difference, wherein the minimum battery strings of numerical value, by contrasting detection device, this minimum value is contrasted with the security value (s) for setting, then assert that this battery strings is exactly to ferment failure or have occurred and that failure beyond determined scope;Therefore, the present invention has the advantages that to detect that accurate, detection is timely, gathers current signal in time.

Description

The BMS and detection method of a kind of combination of network structure battery
Technical field
The invention belongs to battery detecting technical field, and in particular to the BMS and detection method of combination of network structure battery.
Background technology
In electric automobile field, the configuration of battery employs unified structure now, is exactly first in parallel with single battery Into an electric unit, then whole group battery is concatenated into such unit, purpose in parallel be in order to reach required capacity, The purpose of series connection is to reach required voltage, be simply expressed as × and × string.
The battery circuit of vehicle, is powered using single string of batteries;Such circuit structure, is uncontrollable parallel units Cell damage.When battery is damaged, no matter how many single-unit in unit, be all to damage.Just because of this kind of Damage, increased the operating cost of owner, make electric automobile be difficult to be competed with fuel vehicle;The capacity of usual unit about 50Ah ~ 400Ah.In the damage of unit internal cell, all since a battery, if using soft-package battery, least unit is 20Ah, if using 18650 cylindrical batteries, least unit is exactly 2Ah.But with the structure of " first in parallel ", damage and be just exaggerated Manyfold, here it is the secondary damage in battery pack.And N number of cell parallel is used, reliability of operation also drops down to N / mono-;In order to solve the deficiencies in the prior art part, it is necessary to develop flexible and changeable, the abundant space knot adapted on vehicle Structure, beneficial to change failure single-unit, use the wide electromobile battery combination of network method of scope.
For above technical problem, a kind of accumulator of electric car combination of network method is now designed, by first will be each Individual perpendicular row is all to be together in series to obtain independent battery strings with single battery, then some independent battery strings are in parallel at two ends Get up, in waiting on electrical voltage point for each battery strings, connect cable bond, and the battery bag that will be obtained regards a battery, then enter Into the batteries of vehicle, it is all combination in parallel and serial to form the inside and outside of battery bag to row combination of network.With so Battery bag be combined into the battery pack of vehicle, the reliability of battery pack is far above first and the combination gone here and there afterwards;Because battery bag is simultaneously Connection and the combination of series connection, so the nominal voltage and nominal capacity of output can fully can be adapted on vehicle with flexible and changeable Space structure, for multi-configuration battery provides advantage;Failure single-unit in battery bag, is easily found and is changed in time, Reduce the secondary damage of battery;This combination can be used in all of batteries and structure;Therefore, the present invention has It is flexible and changeable, it is abundant adapt to vehicle on space structure, beneficial to change failure single-unit, use the wide advantage of scope.
Battery management system will be adapted to the combination of battery, and batteries and mode use combination of network knot Structure, it is necessary to supporting battery management system BMS;For the elder generation shown in Fig. 1 and the combining structure gone here and there afterwards, BMS records are The magnitude of voltage UDJ of electrical equipment single-unit, and data and the threshold value of setting according to record, send alarm and control signal, this knot The BMS of structure can not be used in the Combined storage battery of combination of network structure;The disadvantage of this combination cannot eliminate battery Secondary damage, the least unit of cell damage is 1 electric single-unit, is exactly 80 ~ 500Ah in figure, when BMS detects certain electricity When gas single-unit voltage drops to critical value, output loop will be alarmed and turn off, the single-unit of minimum capacity governs the electricity of vehicle Can output;For problem above, exploitation detection is accurate, it is timely to detect, the BMS of collection current signal in time combination of network structure Tool is of great significance.
The content of the invention
For above technical problem, the invention aims to overcome the deficiencies in the prior art, and provide detection it is accurate, Detection gathers the BMS of the combination of network structure of current signal in time, in time.
The present invention is realized by following technological means:
A kind of BMS of combination of network structure battery, described BMS includes that voltage acquisition module, temperature collect module, electric current are adopted Collection module, charge and discharge control module, heat management control module, equalization control module, 485 communication modules and CAN communication modules and The MCU processors being connected with each module, wherein,
Described voltage acquisition module is made up of switch selection circuit, 12 ADC in operational amplifier OP279, MCU inside;
Described current acquisition module is Closed Loop Hall;Described temperature collect module uses thermistor NTC;
Described Balance route mould is realized balanced using switching device and resistor coupled in parallel using equalization methods are damaged at battery two ends Control;
Described charge and discharge control module is the break-make for controlling battery set charge/discharge loop;Described heat management control module passes through The break-make of control fan or heater is realized;
Described CAN communication modules are generally by CAN insulating power supplies, communication isolation circuit, CAN transmission circuits, CAN controllers Composition;
Described 485 communication 4 is made up of the serial data communication module of MCU, MAX485 transceivers.
Combination of network structure battery detection is carried out using above-mentioned BMS, according to the difference that electric current between battery strings is distributed, is judged Whether batteries are in rational state, and it is concretely comprised the following steps:
1)The output current of each string, obtains output current A in N string batteries in collection composition whole group battery1~AN's Data;
2)According to the difference that electric current between battery strings is distributed, the minimum battery strings of numerical value are drawn, by this minimum value and setting Security value (s) is contrasted, and then assert that this battery strings is exactly to ferment failure or have occurred and that failure beyond determined scope;
3)After determining the minimum battery strings of current values, after the time by setting, again this battery strings are carried out with detection electricity Flow valuve, if excursion of the numerical value change beyond setting, assert this battery strings to ferment failure or having occurred and that event Barrier.
Beneficial effects of the present invention:
Battery is a kind of electrochemical energy storing device, and the function of current of long period can just add up to turn into voltage effect, so inspection Survey the place that current signal can be fermented with early detection failure;Taking maintenance in time can just avoid secondary damage;Work as department When machine finds that certain string battery is faulty, the string battery can be turned off, vehicle can still run in the case where velocity conditions are reduced, it is to avoid hair Raw rescue;Therefore, the present invention has the advantages that to detect that accurate, detection is timely, gathers current signal in time.
Brief description of the drawings
Fig. 1 is combination assumption diagram that is first and going here and there afterwards.
Fig. 2 is the data principles figure of the BMS of inventive network combining structure.
Fig. 3 is the control structure block diagram of the BMS of inventive network combining structure.
Specific embodiment
Below in conjunction with the embodiment of the present invention and accompanying drawing, the technical scheme in the embodiment of the present invention is carried out clear, complete Ground description, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.Based on this Embodiment in invention, the every other reality that those of ordinary skill in the art are obtained under the premise of creative work is not made Example is applied, the scope of protection of the invention is belonged to.
Combination of network Combined storage battery, referred to as group of networks are legal;Each perpendicular row is together in series with single battery To independent battery strings, then being together in parallel some independent battery strings at two ends;Electrical voltage point is waited in each battery strings On, connect one " cable bond ".In a battery bag, the discharge and recharge call wire in existing perpendicular direction, the pressure for having transverse direction again Current-conducting line, here it is the general principle structure of group of networks sum;The battery pack of vehicle is combined into such battery bag, electricity The reliability of pond group is far above combination that is first and going here and there afterwards;Because battery bag is combination in parallel and serial, so output is nominal Voltage and nominal capacity can fully adapt to the space structure on vehicle, for multi-configuration battery has been provided with flexible and changeable Sharp condition;Failure single-unit in battery bag, is easily found and is changed in time, reduces the secondary damage of battery;This combination side Formula can be used in all of batteries and structure;Therefore, there is flexible and changeable, the abundant space adapted on vehicle to tie for it Structure, beneficial to change failure single-unit, use the wide advantage of scope.The present invention is directed to said structure, there is provided a kind of combination of network structure The BMS of battery, described BMS includes voltage acquisition module, temperature collect module, current acquisition module, charge and discharge control mould At block, heat management control module, equalization control module, 485 communication modules and CAN communication modules and the MCU being connected with each module Reason device, wherein, described voltage acquisition module is by switch selection circuit, the 12 ADC groups in operational amplifier OP279, MCU inside Into;Described current acquisition module is Closed Loop Hall;Described temperature collect module uses thermistor NTC;It is described Balance route mould using damaging equalization methods, realize Balance route at battery two ends using switching device and resistor coupled in parallel;Institute The charge and discharge control module stated is the break-make for controlling battery set charge/discharge loop;Described heat management control module is by controlling wind The break-make of fan or heater is realized;Described CAN communication modules are generally received by CAN insulating power supplies, communication isolation circuit, CAN Power Generation Road, CAN controllers composition;485 described 4 serial data communication module, the MAX485 transceiver groups by MCU of communication Into.
Combination of network structure battery detection is carried out using above-mentioned BMS, according to the difference that electric current between battery strings is distributed, is judged Whether batteries are in rational state, and it is concretely comprised the following steps:
1)The output current of each string, obtains output current A in N string batteries in collection composition whole group battery1~AN's Data;
2)According to the difference that electric current between battery strings is distributed, the minimum battery strings of numerical value are drawn, by this minimum value and setting Security value (s) is contrasted, and then assert that this battery strings is exactly to ferment failure or have occurred and that failure beyond determined scope;
3)After determining the minimum battery strings of current values, after the time by setting, again this battery strings are carried out with detection electricity Flow valuve, if excursion of the numerical value change beyond setting, assert this battery strings to ferment failure or having occurred and that event Barrier.
Embodiment 1
As shown in figure 3, a kind of BMS of combination of network structure battery, described BMS include voltage acquisition module, temperature acquisition mould Block, current acquisition module, charge and discharge control module, heat management control module, equalization control module, 485 communication modules and CAN Communication module and the MCU processors being connected with each module, wherein, described voltage acquisition module is by switch selection circuit, computing The ADC compositions of amplifier OP279, MCU inside 12;Described current acquisition module is Closed Loop Hall;Described temperature Acquisition module uses thermistor NTC;Described Balance route mould is used and damages equalization methods, using switching device and resistance simultaneously It is associated in battery two ends and realizes Balance route;Described charge and discharge control module is the break-make for controlling battery set charge/discharge loop;Institute The heat management control module stated is realized by controlling the break-make of fan or heater;Described CAN communication modules are generally by CAN Insulating power supply, communication isolation circuit, CAN transmission circuits, CAN controllers composition;485 described communications 4 are by the serial of MCU Data communication module, MAX485 transceivers composition.
As shown in Figure 1-2, the BMS of combination of network structure, the detection of combination of network structure is according to the electric current number for being battery strings According to, according between battery strings electric current distribute difference, judge batteries whether be in rational state;Whole group battery is to use N String batteries synthesis, the output current A of every a string of batteries is gathered, the data of A1~AN are just obtained, compare its difference, wherein The minimum battery strings of numerical value, by contrasting detection device, this minimum value are contrasted with the security value (s) of setting, beyond institute Determine scope and then assert that this battery strings is exactly to ferment failure or having occurred and that failure.
Battery is a kind of electrochemical energy storing device, and the function of current of long period can just add up to turn into voltage effect, institute With the place that sensed current signal can be fermented with early detection failure;Taking maintenance in time can just avoid secondary damage; When driver has found that certain string battery is faulty, the string battery can be turned off, vehicle can still run in the case where velocity conditions are reduced, keep away Exempt to rescue;Therefore, the present invention has the advantages that to detect that accurate, detection is timely, gathers current signal in time.
Finally, above example and accompanying drawing are merely illustrative of the technical solution of the present invention and unrestricted, although by above-mentioned Embodiment is described in detail to the present invention, it is to be understood by those skilled in the art that can in form and carefully Various changes are made to it on section, without departing from claims of the present invention limited range.

Claims (7)

1. a kind of BMS of combination of network structure battery, it is characterised in that:Described BMS includes that voltage acquisition module, temperature are adopted Collection module, current acquisition module, charge and discharge control module, heat management control module, equalization control module, 485 communication modules and CAN communication modules and the MCU processors being connected with each module, wherein,
Described voltage acquisition module is made up of switch selection circuit, 12 ADC in operational amplifier OP279, MCU inside;
Described current acquisition module is Closed Loop Hall;Described temperature collect module uses thermistor NTC;
Described Balance route mould is realized balanced using switching device and resistor coupled in parallel using equalization methods are damaged at battery two ends Control;
Described charge and discharge control module is the break-make for controlling battery set charge/discharge loop;Described heat management control module passes through The break-make of control fan or heater is realized;
Described CAN communication modules are generally by CAN insulating power supplies, communication isolation circuit, CAN transmission circuits, CAN controllers Composition;
Described 485 communication 4 is made up of the serial data communication module of MCU, MAX485 transceivers.
2. the BMS of a kind of combination of network structure battery according to claim 1, it is characterised in that:Described MCU processors It is MC9S08DZ60.
3. the BMS of a kind of combination of network structure battery according to claim 1, it is characterised in that:Described communication isolating Chip uses ADuM1201;CAN transceiving chips use TJA1050.
4. the BMS of a kind of combination of network structure battery according to claim 1, it is characterised in that:Described BMS is by electricity The isoparametric detection of the voltage in pond, electric current, temperature, state estimation and fault diagnosis, realization battery is carried out charge and discharge control, Balance route, heat management and data display.
5. a kind of detection method of the BMS of combination of network structure battery, it is characterised in that:Combination of network is carried out using above-mentioned BMS Whether structure battery is detected, according to the difference that electric current between battery strings is distributed, judges batteries in rational state, and its is specific Step is:
1)The output current of each string, obtains output current A in N string batteries in collection composition whole group battery1~ANNumber According to;
2)According to the difference that electric current between battery strings is distributed, the minimum battery strings of numerical value are drawn, by this minimum value and setting Security value (s) is contrasted, and then assert that this battery strings is exactly to ferment failure or have occurred and that failure beyond determined scope;
3)After determining the minimum battery strings of current values, after the time by setting, again this battery strings are carried out with detection electricity Flow valuve, if excursion of the numerical value change beyond setting, assert this battery strings to ferment failure or having occurred and that event Barrier.
6. the detection method of the BMS of a kind of combination of network structure battery according to claim 5, it is characterised in that:By profit After the current signal of the battery strings collected with Closed Loop Hall, at the current signal transfer that sensor will be gathered to MCU Reason device is detected, controlled and stored.
7. the detection method of the BMS of a kind of combination of network structure battery according to claim 5, it is characterised in that:Work as profit When detecting single-unit voltage with the voltage acquisition module of BMS and dropping to critical value, BMS is by 485 communication modules by alarm signal Transmit to external alert system.
CN201710094256.7A 2017-02-21 2017-02-21 The BMS and detection method of a kind of combination of network structure battery Pending CN106872902A (en)

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CN112109589A (en) * 2020-09-22 2020-12-22 一汽解放汽车有限公司 Battery fault processing method and device, vehicle and storage medium
CN112140890A (en) * 2020-09-28 2020-12-29 中车资阳机车有限公司 Control method for multi-branch power battery system of hybrid power locomotive

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CN112140890A (en) * 2020-09-28 2020-12-29 中车资阳机车有限公司 Control method for multi-branch power battery system of hybrid power locomotive
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