CN106891762B - A kind of accumulator of electric car replaces dead battery method in safeguarding - Google Patents
A kind of accumulator of electric car replaces dead battery method in safeguarding Download PDFInfo
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- CN106891762B CN106891762B CN201710094250.XA CN201710094250A CN106891762B CN 106891762 B CN106891762 B CN 106891762B CN 201710094250 A CN201710094250 A CN 201710094250A CN 106891762 B CN106891762 B CN 106891762B
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- battery
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION 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
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling 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
- 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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- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
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Abstract
A kind of method that dead battery is replaced in being safeguarded the present invention relates to accumulator of electric car, it is characterised in that：Keep replacing battery and original battery consistency；On the BMS of original battery, record has the voltage U values of the discharge process of battery and corresponding current value, is just needed with same current discharge to U state of value if above U values with same load current detection, voltage during spare unit battery replacement；If voltage is less than U values, it is necessary to charges, makes the dynamic load ability for reaching U-shaped state measurement battery during its discharge examination, dynamic load ability identical battery can be applied in combination；The present invention has ensure to change before and after the uniformity of battery capacity, the advantages of substitute mode is simple.
Description
Technical field
The invention belongs to battery detecting technical field, and in particular to a kind of accumulator of electric car replaces failure electricity in safeguarding
The method in pond.
Background technology
Lithium battery in actual applications, generally requires multi-section serial using to reach the requirement of voltage, at present due to battery
Group technology is not good enough, battery with two side terminals is also difficult to be guaranteed, with the increase of charge and discharge cycles number, between battery
Difference also can be increasing, cause battery management system SOC calculate and control strategy in terms of many problems be present, influence
The service life of battery pack.We in battery pack and other cell uniformity battery far short of what is expected be called dead battery,
If dead battery can be found out or look-ahead comes out, to battery pack use and manage all will have it is very big good
Place.
The inherent attribute parameter of battery compares now to be difficult to measure, and the processing for tackling dead battery at present does not have in the industry row also
Effective method, mainly by internal resistance measurement, charge/discharge capacity measure the methods of, because the accuracy of measurement and practicality etc. are deposited
In limitation, so as to can not all solve the problem well.
In battery service, always there are the job requirements for changing battery.In order to ensure the harmony of batteries, replacing is got on
Battery, its structural capacity and retained storage capacity should be consistent with the state instantly of batteries.This is difficult in actual process
With what is accomplished.The battery generally changed, retained storage capacity and structural capacity can all be more than the batteries safeguarded；If replace with
The battery gone, in recycling several times, it can progressively be reached unanimity with other batteries of battery pack, this just relaxes operation limit
System, lead-acid battery inherently have the advantage that.Lithium battery is then different, and because lithium battery has BMS monitoring, that changes is electric
Single battery, if structural capacity is more than other batteries of battery pack, retained storage capacity is less than other batteries, just shows during charging
" soft " characteristic, battery pack is not influenceed.But low voltage when discharging, BMS will clamp down on the discharge capacity of whole group battery so that
Whole group discharge capacity reduces.The reduction of whole group battery charging capacity can be also clamped down on if retained storage capacity is higher, during charging.Here it is
With the maintaining method for the single battery for providing for simple replacement of high quality, the immanent cause of the reliability of electric automobile will not be increased；For
In place of the deficiencies in the prior art, it is necessary to which uniformity, the substitute mode for developing battery capacity before and after ensureing to change are simple
Accumulator of electric car replaces dead battery method in safeguarding.
The content of the invention
The invention aims to overcome the deficiencies in the prior art, and provide a kind of battery capacity before and after ensureing replacing
Uniformity, the simple accumulator of electric car of substitute mode method that dead battery is replaced in safeguarding.
The present invention realizes by the following means：
A kind of accumulator of electric car replaces dead battery method in safeguarding, specific replacement step are：
1）Behindhand battery is positioned using the battery on-line detecting system of battery, finds out dead battery, and utilize
The voltage U values of the discharge process of BMS systems record battery and corresponding current value, are stored in battery；
2）Load current detection is carried out to spare unit battery using identical current value is recorded with BMS systems, if voltage is high
Just needed with same current discharge to U state of value in U values；If voltage is less than U values, to reaching U-shaped state during its discharge examination,
Obtain the spare unit battery of identical dynamic load ability；
3）By step 2）Obtained spare unit battery and dead battery is replaced.
Described battery on-line detecting system includes control module, monitoring modular and host computer, voltage, electricity to battery
Stream, internal resistance, temperature, SOC and SOH parameters are acquired.
Beneficial effects of the present invention：
In the present invention, using the technology, it can be ensured that after changing single battery, the one of battery group capacity state
Cause property；The dynamic load ability of battery is measured, dynamic load ability identical battery can be applied in combination；Specific implementation method is
On the BMS of original battery, record has the voltage U values of the discharge process of battery and corresponding current value, during spare unit battery replacement
With same load current detection, voltage is just needed with same current discharge to U state of value if above U values；If voltage
Less than U values, it is necessary to charge, make to reach U-shaped state during its discharge examination；Therefore, the present invention has battery pack before and after guarantee replacing
The uniformity of capacity, the advantages of substitute mode is simple.
Brief description of the drawings
Fig. 1 is the hardware structure diagram of battery on-line detecting system.
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 describes, it is clear that described embodiment is only part of the embodiment of the present 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, belongs to the scope of protection of the invention.
A kind of accumulator of electric car replaces dead battery method in safeguarding, specific replacement step are：
1）Behindhand battery is positioned using the battery on-line detecting system of battery, finds out dead battery, and utilize
The voltage U values of the discharge process of BMS systems record battery and corresponding current value, are stored in battery；
2）Load current detection is carried out to spare unit battery using identical current value is recorded with BMS systems, if voltage is high
Just needed with same current discharge to U state of value in U values；If voltage is less than U values, to reaching U-shaped state during its discharge examination,
Obtain the spare unit battery of identical dynamic load ability；
3）By step 2）Obtained spare unit battery and dead battery is replaced.
Battery on-line detecting system includes control module, monitoring modular and host computer, to the voltage of battery, electric current, interior
Resistance, temperature, SOC and SOH parameters are acquired.One control module can access multiple monitoring modulars, complete to different batteries
The monitoring management of number of elements and the Li-ion batteries piles of different voltage specifications, two groups of lithium ion batteries can be managed simultaneously.Per Battery pack
Group has 24 test points.
Control module：Operate, have long-range for data transfer, processing and man-machine interface（Concentrate）RS485 interfaces, prison
Survey module control mouth, operation keyboard, Chinesizing display panel, sound and light alarm and warning output node.Control module real-time display electricity
Pond data, intellectual analysis data, to the battery operation situation progress of exception and alarm.Monitoring modular is controlled by bus structures
Work, collects the data of monitoring modular collection, and the event of generation is carried out judging processing and sends sound and light alarm, completes data
The function such as communication, storage and inquiry.
Monitoring modular：For the inspection of lithium ion battery data, built-in CPU independences high speed operation, except carry out conventional voltage,
Outside the monitorings such as electric current, temperature, the internal resistance of cell can be accurately monitored after being connected with internal resistance monitoring unit on-line.Monitoring modular is arranged on electricity
Near pond, and control module, connection is communicated between PC, facilitates field connection to install.
Host computer：The function that the function and control module of completion are completed is substantially the same, can replace control module.
Include voltage acquisition module, temperature collect module, current acquisition module, charge and discharge control module, heat described in BMS
Management control module, equalization control module, 485 communication modules and CAN communication modules and the MCU processors being connected with each module,
Wherein,
Voltage acquisition module is made up of 12 ADC inside switch selection circuit, operational amplifier OP279, MCU；
Current acquisition module is Closed Loop Hall；Described temperature collect module uses thermistor NTC；
Balance route mould realizes balanced control at battery both ends using equalization methods are damaged, using switching device and resistor coupled in parallel
System；
Described charge and discharge control module is the break-make in control battery set charge/discharge loop；Described heat management control module
By controlling the break-make of fan or heater to realize；
Described CAN communication modules are generally controlled by CAN insulating power supplies, communication isolation circuit, CAN transmission circuits, CAN
Device composition processed；
Described 485 communication 4 is made up of MCU serial data communication module, MAX485 transceivers.
Embodiment
A kind of accumulator of electric car replaces dead battery method in safeguarding, specific replacement step are：
1）Behindhand battery is positioned using the battery on-line detecting system of battery, finds out dead battery, and utilize
The voltage U values of the discharge process of BMS systems record battery and corresponding current value, are stored in battery；
2）Load current detection is carried out to spare unit battery using identical current value is recorded with BMS systems, if voltage is high
Just needed with same current discharge to U state of value in U values；If voltage is less than U values, to reaching U-shaped state during its discharge examination,
Obtain the spare unit battery of identical dynamic load ability；
3）By step 2）Obtained spare unit battery and dead battery is replaced.
Battery on-line detecting system includes control module, monitoring modular and host computer, to the voltage of battery, electric current, interior
Resistance, temperature, SOC and SOH parameters are acquired.One control module can access multiple monitoring modulars, complete to different batteries
The monitoring management of number of elements and the Li-ion batteries piles of different voltage specifications, two groups of lithium ion batteries can be managed simultaneously.Per Battery pack
Group has 24 test points.
Control module：Operate, have long-range for data transfer, processing and man-machine interface（Concentrate）RS485 interfaces, prison
Survey module control mouth, operation keyboard, Chinesizing display panel, sound and light alarm and warning output node.Control module real-time display electricity
Pond data, intellectual analysis data, to the battery operation situation progress of exception and alarm.Monitoring modular is controlled by bus structures
Work, collects the data of monitoring modular collection, and the event of generation is carried out judging processing and sends sound and light alarm, completes data
The function such as communication, storage and inquiry.
Monitoring modular：For the inspection of lithium ion battery data, built-in CPU independences high speed operation, except carry out conventional voltage,
Outside the monitorings such as electric current, temperature, the internal resistance of cell can be accurately monitored after being connected with internal resistance monitoring unit on-line.Monitoring modular is arranged on electricity
Near pond, and control module, connection is communicated between PC, facilitates field connection to install.
Host computer：The function that the function and control module of completion are completed is substantially the same, can replace control module.
Include voltage acquisition module, temperature collect module, current acquisition module, charge and discharge control module, heat described in BMS
Management control module, equalization control module, 485 communication modules and CAN communication modules and the MCU processors being connected with each module,
Wherein,
Voltage acquisition module is made up of 12 ADC inside switch selection circuit, operational amplifier OP279, MCU；
Current acquisition module is Closed Loop Hall；Described temperature collect module uses thermistor NTC；
Balance route mould realizes balanced control at battery both ends using equalization methods are damaged, using switching device and resistor coupled in parallel
System；
Described charge and discharge control module is the break-make in control battery set charge/discharge loop；Described heat management control module
By controlling the break-make of fan or heater to realize；
Described CAN communication modules are generally controlled by CAN insulating power supplies, communication isolation circuit, CAN transmission circuits, CAN
Device composition processed；
Described 485 communication 4 is made up of MCU serial data communication module, MAX485 transceivers.
Such a Combined storage battery, referred to as group of networks are legal；Each perpendicular row is to be together in series to obtain solely with single battery
Vertical battery strings, then being together in parallel some independent battery strings at both ends；In waiting on electrical voltage point for each battery strings, connect
Connect one " cable bond ".In a battery bag, the discharge and recharge call wire in existing perpendicular direction, the equalizing current for having transverse direction again passes
Wire, here it is the general principle structure of group of networks sum；The battery pack of vehicle is combined into such battery bag, battery pack
Reliability is far above combination that is first and going here and there afterwards；Because battery bag is combination in parallel and serial, thus output nominal voltage and
Nominal capacity can fully adapt to the space structure on vehicle with flexible and changeable, and advantage is provided for multi-configuration battery；
Failure single-unit in battery bag, is easily found and is changed in time, reduces the secondary damage of battery；This combination can be used
In all batteries and structure, it has flexible and changeable, the abundant space structure adapted on vehicle, failed beneficial to replacing
The advantages of single-unit, wide use range.
In the present invention, using the technology, it can be ensured that after changing single battery, the one of battery group capacity state
Cause property；The dynamic load ability of battery is measured, dynamic load ability identical battery can be applied in combination；Specific implementation method is
On the BMS of original battery, record has the voltage U values of the discharge process of battery and corresponding current value, during spare unit battery replacement
With same load current detection, voltage is just needed with same current discharge to U state of value if above U values；If voltage
Less than U values, it is necessary to charge, make to reach U-shaped state during its discharge examination；Therefore, the present invention has battery pack before and after guarantee replacing
The uniformity of capacity, the advantages of substitute mode is simple.
Finally, above example and accompanying drawing are merely illustrative of the technical solution of the present invention and unrestricted, although by above-mentioned
The present invention is described in detail for embodiment, 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 (4)
1. a kind of accumulator of electric car replaces dead battery method in safeguarding, it is characterised in that specifically replacement step is：
1) behindhand battery is positioned using the battery on-line detecting system of battery, finds out dead battery, and utilize electric power storage
The voltage U values of the discharge process of BMS systems record battery and corresponding current value, are stored in pond；
2) identical current value is recorded to spare unit battery progress load current detection using with BMS systems, voltage is if above U values
With regard to needing with same current discharge to U state of value；If voltage is less than U values, to reaching U-shaped state during its discharge examination, obtain
The spare unit battery of identical dynamic load ability；
3) the spare unit battery that step 2) obtains is replaced with dead battery,
The battery on-line detecting system includes control module and monitoring modular, wherein, the control module be used for data transfer,
Processing and man-machine interface operation, there is long-range RS485 interfaces, monitoring modular control mouth, operation keyboard, Chinesizing display panel, sound
Light alarm and warning output node, control module real-time display battery data, intellectual analysis data, to the battery operation feelings of exception
Condition carries out and alarm, controls monitoring modular to work by bus structures, collects the data of monitoring modular collection, and to generation
Event carries out judging processing and sends sound and light alarm, completes the communication, storage and query function of data；
The monitoring modular be used for lithium ion battery data inspection, built-in CPU independences high speed operation, except carry out conventional voltage,
Outside electric current, temperature monitoring, the internal resistance of cell can be accurately monitored after being connected with internal resistance monitoring unit on-line；Monitoring modular is arranged on battery
Near, and control module, connection is communicated between PC, facilitates field connection to install.
2. a kind of accumulator of electric car according to claim 1 replaces dead battery method in safeguarding, its feature exist
In described battery on-line detecting system is acquired to the voltage of battery, electric current, internal resistance, temperature, SOC and SOH parameters.
3. a kind of accumulator of electric car according to claim 1 replaces dead battery method in safeguarding, its feature exist
In described BMS includes voltage acquisition module, temperature collect module, current acquisition module, charge and discharge control module, heat management
Control module, equalization control module, 485 communication modules and CAN and the MCU processors being connected with each module.
4. a kind of accumulator of electric car according to claim 1 replaces dead battery method in safeguarding, its feature exist
In described BMS is realized to electricity by the voltage of battery, electric current, the detection of temperature parameter, state estimation and fault diagnosis
Pond carries out charge and discharge control, Balance route, heat management and data and shown.
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| CN201710094250.XA CN106891762B (en) | 2017-02-21 | 2017-02-21 | A kind of accumulator of electric car replaces dead battery method in safeguarding |
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| CN109193049B (en) * | 2018-10-08 | 2021-03-26 | 深圳宇拓瑞科新能源科技有限公司 | Battery pack management system |
| CN114347853B (en) * | 2022-01-11 | 2023-02-03 | 江苏新日电动车股份有限公司 | Lithium battery management method for two-wheeled electric vehicle |
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| CN102263432A (en) * | 2010-11-08 | 2011-11-30 | 中信国安盟固利动力科技有限公司 | Gush-surplus lithium battery storage battery |
| CN102361099A (en) * | 2011-07-29 | 2012-02-22 | 南京华博科技有限公司 | Balancing control system and method for cell array |
| CN103165947A (en) * | 2011-12-19 | 2013-06-19 | 株式会社东芝 | Electric energy storage system and method of maintaining the same |
| CN104091974A (en) * | 2014-07-07 | 2014-10-08 | 合肥国轩高科动力能源股份公司 | Preparation method of lithium ion battery replacement module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2014127404A (en) * | 2012-12-27 | 2014-07-07 | Furukawa Electric Co Ltd:The | Method for replacing battery pack |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102263432A (en) * | 2010-11-08 | 2011-11-30 | 中信国安盟固利动力科技有限公司 | Gush-surplus lithium battery storage battery |
| CN102361099A (en) * | 2011-07-29 | 2012-02-22 | 南京华博科技有限公司 | Balancing control system and method for cell array |
| CN103165947A (en) * | 2011-12-19 | 2013-06-19 | 株式会社东芝 | Electric energy storage system and method of maintaining the same |
| CN104091974A (en) * | 2014-07-07 | 2014-10-08 | 合肥国轩高科动力能源股份公司 | Preparation method of lithium ion battery replacement module |
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