CN107554347A - Power battery management system monomer intelligence sample device - Google Patents
Power battery management system monomer intelligence sample device Download PDFInfo
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- CN107554347A CN107554347A CN201710912773.0A CN201710912773A CN107554347A CN 107554347 A CN107554347 A CN 107554347A CN 201710912773 A CN201710912773 A CN 201710912773A CN 107554347 A CN107554347 A CN 107554347A
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- sampling
- chip
- controlling
- management system
- battery management
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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
Abstract
The invention discloses a kind of power battery management system monomer intelligence sample device, including sampling main control module, multiple controlling of sampling chips and multiple sampling A/D chips.Each sampling A/D chip electrically connects with each cell, and each sampling A/D chip gathers and exports the sampled data of corresponding cell independently of each other.The controlling of sampling chip by SPI interface simultaneously with each sampling A/D chip is two-way electrically connects so that the controlling of sampling chip obtains the sampled data that each sampling A/D chip is gathered simultaneously.Main control module is two-way electrically connects with sampling by CAN for the controlling of sampling chip so that the sampling main control module obtains the sampled data for each sampling A/D chip that each controlling of sampling chip is collected simultaneously.Power battery management system monomer intelligence sample device disclosed by the invention, the battery bag inner space shared by sampling main control module is saved, cost is reduced while electrokinetic cell sampling precision is improved.
Description
Technical field
The invention belongs to technical field of power battery management, and in particular to a kind of power battery management system monomer information is adopted
Sampling device.
Background technology
Lithium battery has that energy density is high, have extended cycle life, memory-less effect, charging rate are fast, high/low temperature strong adaptability
The advantages that, it has been widely used in the fields such as electrokinetic cell and energy storage.In the running of batteries of electric automobile group, in order to pacify
Full monitoring, it is necessary to gather the voltage data of the often string battery in battery pack in real time.
The battery bag energy storage of electric automobile is huge, is often made up of hundreds and thousands of individual battery units.Generally by dozens of extremely
Tens battery cells are in parallel to form a battery module, then multiple battery modules are mutually combined and form a battery bag.
Therefore, tens are often had inside single battery bag to the cells up to a hundred for saving and being serially connected, is correspondingly needed
Numerous voltage sample passages.In this case, each battery unit is carried out sampling required sampling module quantity straight line
Rise.In the case of compact in battery bag inner space, if answering for battery pack structure can be increased by being put into too many sampling module
Polygamy, and significantly increase cost.
In addition, the running status of each cell needs to be monitored in real-time.By the voltage, electric current, temperature that obtain battery
The parameters such as degree analyze the real-time status of battery, ensure can safely and reliably to run while battery plays maximum performance, because
This proposes high requirement for sampling precision.
The content of the invention
The present invention is directed to the situation of prior art, there is provided a kind of power battery management system monomer intelligence sample device.
The present invention uses following technical scheme, and the power battery management system monomer intelligence sample device, which includes sampling, to be led
Module, multiple controlling of sampling chips and multiple sampling A/D chips are controlled, wherein：
Each sampling A/D chip is electrically connected with each cell, and each sampling A/D chip is gathered and exported corresponding single independently of each other
The sampled data of body battery；
The controlling of sampling chip by SPI interface simultaneously with each sampling A/D chip is two-way electrically connects so that the controlling of sampling
Chip obtains the sampled data that each sampling A/D chip is gathered simultaneously；
Main control module is two-way electrically connects with sampling by CAN for the controlling of sampling chip so that the sampling main control module
The sampled data for each sampling A/D chip that each controlling of sampling chip is collected is obtained simultaneously.
According to above-mentioned technical proposal, above-mentioned sampled data includes but is not limited to voltage data, current data and temperature data.
According to above-mentioned technical proposal, the power battery management system monomer intelligence sample device also includes battery balanced electricity
Road, the controlling of sampling chip electrically connect with each battery equalizing circuit simultaneously.
According to above-mentioned technical proposal, the sampling main control module sends equalization command to each controlling of sampling chip so that
Each controlling of sampling chip selectively turns on or closed battery equalizing circuit according to acquired equalization command.
According to above-mentioned technical proposal, the controlling of sampling chip is sent according to the preset sampling period to each sampling A/D chip
Sample command so that each sampling A/D chip gathers the sampled data of corresponding cell according to acquired sample command, described
The sampled data gathered is returned to controlling of sampling chip by sampling A/D chip simultaneously；The controlling of sampling chip is by multiple sampling cores
The sampled data that piece is returned collected after formed sampled data packet, the controlling of sampling chip to sampling main control module
Return above-mentioned sampled data packet.
According to above-mentioned technical proposal, the above-mentioned preset sampling period is 100ms.
According to above-mentioned technical proposal, the sampling A/D chip uses LTC6811 chips.
According to above-mentioned technical proposal, the controlling of sampling chip uses MC9S12G128 chips.
Power battery management system monomer intelligence sample device disclosed by the invention, its advantage are, save sampling
Battery bag inner space shared by main control module, cost is reduced while electrokinetic cell sampling precision is improved.
Brief description of the drawings
Fig. 1 is the system block diagram of the preferred embodiment of the present invention.
Reference includes：1- controlling of sampling chips；2- sampling A/D chips；3- samples main control module.
Embodiment
The invention discloses a kind of power battery management system monomer intelligence sample device, with reference to preferred embodiment,
The embodiment of the present invention is further described.
Referring to Fig. 1 of accompanying drawing, Fig. 1 shows the module knot of the power battery management system monomer intelligence sample device
Structure.Preferably, the power battery management system monomer intelligence sample device includes sampling main control module 3, multiple controlling of sampling
Chip 1 and multiple sampling A/D chips 2；Wherein, each sampling A/D chip 2 electrically connects with each cell, and each sampling A/D chip 2 is mutual
Independently gather and export the sampled data of corresponding cell, above-mentioned sampled data includes but is not limited to voltage data, electricity
Flow data and temperature data.
Preferably, the controlling of sampling chip 1 by SPI interface simultaneously with each sampling A/D chip 2 is two-way electrically connects so that
The controlling of sampling chip 1 obtains the sampled data that each sampling A/D chip 2 is gathered simultaneously.
Preferably, main control module 3 is two-way electrically connects with sampling by CAN for the controlling of sampling chip 1 so that described
Sampling main control module 3 obtains the sampled data for each sampling A/D chip 2 that each controlling of sampling chip 1 is collected simultaneously（It is aggregated
The sampled data packet of formation）.
Preferably, in sampling process, the controlling of sampling chip 1 is according to the preset sampling period to each sampling A/D chip
2 send sample command so that each sampling A/D chip 2 gathers the hits of corresponding cell according to acquired sample command
According to the sampled data gathered is returned to controlling of sampling chip 1 by the sampling A/D chip 2 simultaneously；The controlling of sampling chip 1 will
The sampled data that multiple sampling A/D chips 2 are returned collected after formed sampled data packet, the controlling of sampling chip 1 to
Sampling main control module 1 returns above-mentioned sampled data packet.
Preferably, the above-mentioned preset sampling period is 100ms.
Preferably, the power battery management system monomer intelligence sample device also includes battery equalizing circuit, described to adopt
Sample control chip 1 electrically connects with each battery equalizing circuit simultaneously.During equilibrium discharge, it is described sampling main control module 3 to
Each controlling of sampling chip 1 sends equalization command so that each controlling of sampling chip 1 is according to acquired equalization command selectivity
Ground is turned on or off battery equalizing circuit.
According to above preferred embodiment, power battery management system is using sampling main control module 3 for each cell
Sampled.In order to increase ampling channel number and reduce cost, multiple sampling A/D chips 2 are integrated together one sampling mould of composition
Block（Each sampling module is provided with a controlling of sampling chip 1）, so add while sample in limited area and space
Port number.Multiple sampling modules can be carried in one battery bag, each sampling module is in a manner of CAN with sampling master control mould
Block 3 realizes connecting communication, forms an internal battery pack network.Sampling module by after electric current, voltage, temperature data acquisition, with
Sampling data transmitting is delivered to sampling main control module 3 by specific protocol form by CAN network.
Preferably, sampling A/D chip 2 is predisposed to 100ms for the sampling period of cell.
Wherein, sample main control module 3 and real-time sampling is carried out to cell, by the battery current voltage and temperature of periodic sampling
Degrees of data timing is back to sampling main control module 3.Main control module 3 is sampled by being monitored in real time to each cell, root
Discharge and recharge of the sampled data obtained according to collection to current battery is controlled, while estimates battery capacity.Ensure battery pack
The efficiency of maximum is played in the state of safe operation.
Notice that internal battery pack has large number of cell, each cell is inevitably present difference
It is different.Increase as usage time increases with discharge and recharge number, the difference between each cell can be increasing.
In order to overcome this shortcoming, the present invention can also realize that cell difference is corrected.Electricity is added inside battery bag
Pond equalizing circuit, by series resistance discharge in the form of, by the battery electric quantity of current relative high capacity put to low-capacity batteries one
The state of cause.
Preferably, the sampling A/D chip 2 preferably uses LTC6811 chips.The maximum voltage acquisition number of channels of the chip
For 12, there is the maximum overall measurement error less than 1.2mv.Measurement range becomes most of batteries collections in 0V to 5V
The suitable choosing of system composition.In order to realize the suppression to strong noise, relatively low data acquisition rate can be selected.LTC6811
Chip is also equipped with the passage of 5 independent measurement temperature, can connect NTC sensor and battery temperature is monitored in real time.
LTC6811 chips have two kinds of communication patterns of SPI and ISOSPI, support twisted-pair feeder cascade system, upload voltage and temperature information
And receive MOS detections and equalization command.
Preferably, the controlling of sampling chip 1 uses SPI communication mode.By the way that multiple LTC6811 chips are concatenated
Come, monitored while realizing multiple cells in high-voltage battery string, multiple LTC6811 chips are in parallel even with SPI interface
Controlling of sampling chip 1 is connected to, each sampling period is addressed individually.Because chip has relatively low electricity in a sleep mode
Ource electric current, directly it can be powered using isolated power supply.
Preferably, the controlling of sampling chip 1 preferably uses MC9S12G128 chips.The chip is received by SPI communication
The sampled data that LTC6811 chips are gathered, and the information received is uploaded to by sampling main control module 3 by CAN network.
MC9S12G128 chips receive equalization command by CAN network, and are sent equalization command to LTC6811 by SPI interface
Chip, to realize the switch control of passive equilibrium.
For a person skilled in the art, the technical scheme described in foregoing embodiments can still be repaiied
Change, or equivalent substitution is carried out to which part technical characteristic, within the spirit and principles of the invention, that is made any repaiies
Change, equivalent substitution, improvement etc., should be included in protection scope of the present invention.
Claims (8)
1. a kind of power battery management system monomer intelligence sample device, it is characterised in that including sampling main control module, multiple adopt
Sample control chip and multiple sampling A/D chips, wherein：
Each sampling A/D chip is electrically connected with each cell, and each sampling A/D chip is gathered and exported corresponding single independently of each other
The sampled data of body battery；
The controlling of sampling chip by SPI interface simultaneously with each sampling A/D chip is two-way electrically connects so that the controlling of sampling
Chip obtains the sampled data that each sampling A/D chip is gathered simultaneously；
Main control module is two-way electrically connects with sampling by CAN for the controlling of sampling chip so that the sampling main control module
The sampled data for each sampling A/D chip that each controlling of sampling chip is collected is obtained simultaneously.
2. power battery management system monomer intelligence sample device according to claim 1, it is characterised in that above-mentioned sampling
Data include but is not limited to voltage data, current data and temperature data.
3. power battery management system monomer intelligence sample device according to claim 1, it is characterised in that the power
Battery management system monomer intelligence sample device also includes battery equalizing circuit, the controlling of sampling chip simultaneously with each battery
Equalizing circuit electrically connects.
4. power battery management system monomer intelligence sample device according to claim 3, it is characterised in that the sampling
Main control module sends equalization command to each controlling of sampling chip so that each controlling of sampling chip is ordered according to acquired equilibrium
Order selectively turns on or closed battery equalizing circuit.
5. power battery management system monomer intelligence sample device according to claim 1, it is characterised in that the sampling
Control chip sends sample command according to the preset sampling period to each sampling A/D chip so that each sampling A/D chip is according to being obtained
The sampled data of the corresponding cell of sample command collection taken, the sampling A/D chip simultaneously return the sampled data gathered
Give controlling of sampling chip；The controlling of sampling chip is formed after the sampled data that multiple sampling A/D chips are returned is collected and adopted
Sample data packet, the controlling of sampling chip return above-mentioned sampled data packet to sampling main control module.
6. power battery management system monomer intelligence sample device according to claim 5, it is characterised in that above-mentioned preset
Sampling period be 100ms.
7. the power battery management system monomer intelligence sample device according to any claim in claim 1-6, its
It is characterised by, the sampling A/D chip uses LTC6811 chips.
8. the power battery management system monomer intelligence sample device according to any claim in claim 1-6, its
It is characterised by, the controlling of sampling chip uses MC9S12G128 chips.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710912773.0A CN107554347A (en) | 2017-09-30 | 2017-09-30 | Power battery management system monomer intelligence sample device |
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| CN201710912773.0A CN107554347A (en) | 2017-09-30 | 2017-09-30 | Power battery management system monomer intelligence sample device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023138397A1 (en) * | 2022-01-24 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Battery module sampling assembly, battery pack, and power-consuming apparatus |
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| CN207388935U (en) * | 2017-09-30 | 2018-05-22 | 浙江合众新能源汽车有限公司 | Power battery management system monomer intelligence sample device |
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| US20110218748A1 (en) * | 2008-11-20 | 2011-09-08 | Yue Wang | Apparatus for Monitoring Battery Voltage and Temperature |
| US20100161260A1 (en) * | 2008-12-19 | 2010-06-24 | Han-Jung Kao | Synchronized data sampling systems and methods |
| WO2012000360A1 (en) * | 2010-06-28 | 2012-01-05 | 惠州市亿能电子有限公司 | Circuit for detecting voltage of batteries |
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| CN203193314U (en) * | 2013-03-14 | 2013-09-11 | 江苏恒迅中锂新能源科技有限公司 | Current sampling chip-based battery management system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023138397A1 (en) * | 2022-01-24 | 2023-07-27 | 宁德时代新能源科技股份有限公司 | Battery module sampling assembly, battery pack, and power-consuming apparatus |
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Address after: Room 206, No. 999, Qingfeng South Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang 314000 Applicant after: Hezhong New Energy Vehicle Co.,Ltd. Address before: Room 206, No. 999, Qingfeng South Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang 314000 Applicant before: HOZON NEW ENERGY AUTOMOBILE Co.,Ltd. Address after: Room 206, No. 999, Qingfeng South Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang 314000 Applicant after: United New Energy Automobile Co.,Ltd. Address before: Room 206, No. 999, Qingfeng South Road, Tongxiang Economic Development Zone, Jiaxing, Zhejiang 314000 Applicant before: Hezhong New Energy Vehicle Co.,Ltd. |
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