CN107871909A - Electric automobile and its battery management system - Google Patents
Electric automobile and its battery management system Download PDFInfo
- Publication number
- CN107871909A CN107871909A CN201710957050.2A CN201710957050A CN107871909A CN 107871909 A CN107871909 A CN 107871909A CN 201710957050 A CN201710957050 A CN 201710957050A CN 107871909 A CN107871909 A CN 107871909A
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- battery
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- 238000012545 processing Methods 0.000 claims abstract description 50
- 230000006854 communication Effects 0.000 claims abstract description 17
- 238000004891 communication Methods 0.000 claims abstract description 16
- 230000005856 abnormality Effects 0.000 claims abstract description 4
- 238000009413 insulation Methods 0.000 claims description 14
- 238000012544 monitoring process Methods 0.000 claims description 9
- 230000005611 electricity Effects 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 2
- 230000001960 triggered effect Effects 0.000 claims description 2
- 239000007787 solid Substances 0.000 claims 1
- 230000003862 health status Effects 0.000 abstract description 4
- 238000007726 management method Methods 0.000 description 35
- 230000006870 function Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 206010033799 Paralysis Diseases 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000036541 health Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery management system, including slave and the main frame that can be in communication with each other with slave；Slave includes and multiple battery modules multiple collecting units correspondingly；Each collecting unit is used for the battery status information for gathering corresponding battery module；Main frame includes first processing module, Second processing module, the 3rd processing module and memory modules；First processing module is used to be communicated with multiple collecting units to receive the battery status information for the corresponding battery module that each collecting unit is sent and battery status information is stored in memory modules；Second processing module is used for the state-of-charge and health status that battery bag is calculated according to battery status information and related algorithm；3rd processing module is used to be communicated with car-mounted terminal and send alarm signal when battery bag is in abnormality.The stability and reliability of battery management system provided by the invention are stronger.The present invention also provides a kind of electric automobile.
Description
【Technical field】
The present invention relates to electric vehicle engineering field, more particularly to a kind of electric automobile and its battery management system.
【Background technology】
At present, the battery management system of electric automobile generally includes main frame and the slave to be communicated with main frame, wherein,
The information that main frame is used to receive slave transmission is estimated with completing SOC (State of Charge, state-of-charge), SOH (State
Of Health, health status) function such as estimation, Insulation monitoring, and communicated with car-mounted terminal；Slave is used to gather battery
The battery status information such as voltage, temperature and internal resistance.However, with slave module number increase, main frame and slave it
Between communication become complex, and the estimation of battery status and the function that is communicated with car-mounted terminal are also by main frame
Single-processor is completed, and then causes load on host computers overweight, occurs that information is lost in transmitting procedure and computing is slower
Situation, and then the SOC for causing the to estimate and actual SOC of battery differs greatly, so as to cause the reliability of battery management system
It is poor with real-time, if in addition, be slave communication when bulk information congestion, will also cause battery management system to be paralysed.
In consideration of it, real be necessary to provide a kind of new battery management system to overcome drawbacks described above.
【The content of the invention】
It is an object of the invention to provide a kind of battery management system, the real-time of the battery management system, stability with
Reliability is stronger.
To achieve these goals, the present invention provides a kind of battery management system, described for being managed to battery bag
Battery bag includes multiple battery modules；The battery management system includes slave and can be in communication with each other with the slave
Main frame；The slave includes and the multiple battery module multiple collecting units correspondingly；Each collecting unit is used for
The battery status information of battery module corresponding to collection；The main frame includes first processing module, Second processing module, at the 3rd
Manage module and memory modules；The first processing module is described every to receive for being communicated with the multiple collecting unit
The battery status information is simultaneously stored in described by the battery status information for the corresponding battery module that individual collecting unit is sent
In storing module；The Second processing module is used to calculate the battery bag according to the battery status information and related algorithm
State-of-charge and health status；3rd processing module is used to be communicated with car-mounted terminal and work as the battery bag to be in
Alarm signal is sent during abnormality.
The present invention also provides a kind of electric automobile, including battery bag and car-mounted terminal；The electric automobile is also included such as
Upper described battery management system；The battery management system is connected with the battery bag and the car-mounted terminal.
Electric automobile and its battery management system provided by the present invention, by with the communication function of slave, computing function with
And completed respectively by first processing module, Second processing module and the 3rd processing module with the communication function of car-mounted terminal,
And then the load factor of whole main frame is reduced, improve the arithmetic speed of battery management system so that the reality of battery management system
Shi Xing, reliability and stability are stronger.
【Brief description of the drawings】
Fig. 1 is the theory diagram of the electric automobile provided in the embodiment of the present invention.
【Embodiment】
In order that the purpose of the present invention, technical scheme and advantageous effects become apparent from understanding, below in conjunction with this hair
Accompanying drawing in bright embodiment, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described
Embodiment is only part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, this area
The every other embodiment that those of ordinary skill is obtained under the premise of creative work is not made, belongs to protection of the present invention
Scope.
When an element was considered as with another element " being connected ", it can be directly to another element or
It may be simultaneously present centering elements.Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to this hair
The implication that bright those skilled in the art are generally understood that is identical.Term used in the description of the invention herein
It is intended merely to describe the purpose of specific embodiment, it is not intended that in the limitation present invention.
Referring to Fig. 1, it is the theory diagram of electric automobile 99 provided by the invention.The electric automobile 99 includes battery
Management system 100, battery bag 200 and car-mounted terminal 300.The battery management system 100 respectively with the battery bag 200 and
The car-mounted terminal 300 is connected.Wherein, the battery management system 100 is used to be managed the battery bag 200, and with
The car-mounted terminal 300 is communicated.In the present embodiment, the battery bag 200 includes multiple battery modules 201.Can be with
Understand, the battery module 201 is by multiple cells battery strings in series or in parallel formed.The car-mounted terminal
300 have merged GPS (Global Position System, global positioning system) technology, mileage location technology and automobile black box
The technologies such as technology, it is achieved thereby that traffic safety monitoring management, operation management, Service Quality buret to the electric automobile 99
The modern managements such as reason, intelligent centralized dispatching management.
The battery management system 100 includes slave 10 and the main frame that can be in communication with each other with the slave 10
20.It is appreciated that the slave 10 can be battery management unit (BMU, Battery Management Unit)；The master
Machine 20 can be battery control unit (BCU, Battery Control Unit).Lead between the slave 10 and the main frame 20
CAN (Controller Area Network, controller LAN) bus is crossed to be in communication with each other.
Further, the slave 10 includes multiple collecting units 11 and an Insulation monitoring unit 12.It is the multiple
Collecting unit 11 corresponds with the multiple battery module 201.Wherein, each collecting unit 11 is used to gather corresponding battery
The battery status information of module 201, and the battery status information collected is sent to the main frame 20.The Insulation monitoring list
Member 12 is used to detect insulation resistance value of the battery bag 200 to car body, and insulation of the battery bag 200 collected to car body is hindered
Value is sent to the main frame 21.In the present embodiment, the battery status information of the battery module 201 includes the battery mould
Voltage, electric current, internal resistance and the temperature of block 201.It is appreciated that pass through the voltage of each battery module 201, electric current, temperature, internal resistance
And in battery module 201 multiple cells connected mode, the voltage, electric current, temperature of each cell can be calculated
Degree and internal resistance.
The main frame 20 includes first processing module 21, Second processing module 22, the 3rd processing module 23 and internal memory mould
Block 24.It is appreciated that the main frame 20 can select three core processors to realize.Wherein, the first processing module 21 is used
Communicated in the slave 10, specifically, the first processing module 21 is used to be communicated with multiple collecting units 11
To receive the battery status information for the corresponding battery module 201 that the multiple collecting unit 11 is sent and by the battery status
Information is stored in the memory modules 24.Further, the first processing module 21 is additionally operable to and the Insulation monitoring list
Member 12 is communicated to receive battery bag 200 that the Insulation monitoring unit 12 sends to the insulation resistance value of car body and by the electricity
The insulation resistance value that 200 pairs of car bodies are wrapped in pond is stored in memory modules 24.In the present embodiment, the first processing module 21 exists
Triggered when the multiple collecting unit 11 is communicated using hardware interrupts event, to ensure the reliable of communication, do not lose message
Data frame.It is appreciated that the first processing module 21 is mainly for the treatment of communications protocol, to realize the transmitting-receiving of message.
The Second processing module 22 is used to calculate the battery according to the battery status information and related algorithm
The SOC (State of Charge, state-of-charge) and SOH (State of Health, health status) of bag 200, for example, existing
Some used Kalman filtering algorithms when calculating battery SOC.In the present embodiment, the Second processing module has
Support the function of floating-point operation to improve arithmetic speed and precision.
3rd processing module 23 is used to be communicated with car-mounted terminal 300, and when the battery bag 200 is in abnormal
Alarm signal is sent during state.In the present embodiment, the abnormality is overcharged including battery bag 200, mistake is put, temperature is too high
And electric leakage.3rd processing module 23 supports RTOS (Real Time Operating System, real time operating system).Institute
State the 3rd processing module 23 to be communicated by CAN and the car-mounted terminal 300, the battery status information is passed through into institute
Car-mounted terminal 300 is stated to send to monitor supervision platform.In other embodiments, the 3rd processing module 23 can also be with vehicle control
Device and charger processed are communicated.It is appreciated that the 3rd processing module 23 can also be realized and the electric automobile 99
Communication between middle other modules or electronic component.The battery management system 100 can also realize existing battery management system
The institute of system is functional, for example, the function such as precharge, high-voltage interlocking, Balance route.
Battery management system 100 provided by the present invention is divided due to the work of main frame 10 is divided into three processing modules
Work processing, computing is gone by the complicated algorithm of high-speed cruising by single core cpu (Second processing module 22), whole so as to reduce
The load factor of individual main frame 20, improve the communication speed of battery management system 100, arithmetic speed and precision so that the battery
The stability of management system and real-time are stronger.
In addition, interval scheduled time Ta is sent the multiple collecting unit 11 successively under fixed baud rate in the form of queue
Corresponding battery status information, that is, each collecting unit 11 according to the logical address of oneself stagger N*Ta time send pair
The battery status information answered, wherein, N is natural number.Using the method for the communication, erroneous frame in communication process be present,
Also the obstructed situation of network is merely caused, without the situation of network paralysis, further ensures the real-time of system
And reliability.
The operation principle of electric automobile 99 of the present invention and its battery management system 100 will be illustrated below.
When the battery bag 200 is in charge or discharge state, each collecting unit 11 gathers corresponding battery module
201 battery status information, and the battery status information collected is sent to first processing module 21.The first processing mould
Block 21 preserves corresponding information to the memory modules 24 after receiving information.Meanwhile the foundation of Second processing module 22
The battery status information and the algorithm of correlation calculate the SOC and SOH of battery bag 200；3rd processing module 23 will
The battery status information is sent to the car-mounted terminal, and judges the battery module 201 according to the battery status information
Whether overcharge and cross and put and whether temperature is too high and when overcharging occurs in the battery module 201, mistake is put or temperature is too high
Alarm signal is sent during situation.
Further, when the Insulation monitoring unit 12 detects insulation resistance value of the battery bag 200 to the car body
During less than preset value, show that the battery bag 200 is being leaked electricity, the 3rd processing module 23 sends alarm signal, and control after
Electrical equipment is disconnected to cut off the High voltage output loop of the battery bag 200, to ensure the safety of user.
Battery management system 100 provided by the present invention is divided due to the work of main frame 10 is divided into three processing modules
Work processing, goes computing, so as to reduce the load of whole main frame 20 by the complicated algorithm of high-speed cruising by Second processing module 22
Rate, the communication speed, arithmetic speed and precision of battery management system 100 are improved so as to improve battery management system 100
Real real-time, reliability and stability.In addition, the multiple collecting unit 11 in the form of queue under fixed baud rate successively between
Battery status information corresponding to being sent every scheduled time Ta, and then avoid battery management system and cause to restart because of network paralysis
Situation occur, further ensure real-time, the reliability and stability of system.
The present invention is not restricted to described in specification and embodiment, therefore for the personnel of familiar field
Additional advantage and modification is easily achieved, therefore in the essence of the universal limited without departing substantially from claim and equivalency range
In the case of refreshing and scope, the present invention is not limited to specific details, representational equipment and shown here as the diagram with description
Example.
Claims (9)
1. a kind of battery management system, for being managed to battery bag, the battery bag includes multiple battery modules；The electricity
Pond management system includes slave and the main frame that can be in communication with each other with the slave；The slave include with it is the multiple
Battery module multiple collecting units correspondingly；Each collecting unit is used for the battery status letter for gathering corresponding battery module
Breath；It is characterized in that：The main frame includes first processing module, Second processing module, the 3rd processing module and memory modules；
The first processing module is used to be communicated with the multiple collecting unit to receive pair that each collecting unit is sent
The battery status information is simultaneously stored in the memory modules by the battery status information for the battery module answered；At described second
Module is managed to be used to calculate the state-of-charge of the battery bag and healthy shape according to the battery status information and related algorithm
State；3rd processing module is used to be communicated with car-mounted terminal and send alarm when the battery bag is in abnormality
Signal.
2. battery management system as claimed in claim 1, it is characterised in that：The first processing module and the multiple collection
Triggered during unit communication using hardware interrupts event.
3. battery management system as claimed in claim 1, it is characterised in that：The Second processing module has floating-point operation work(
Energy.
4. battery management system as claimed in claim 1, it is characterised in that：3rd processing module supports real-time oss
System.
5. battery management system as claimed in claim 1, it is characterised in that：The multiple collecting unit will by CAN
Corresponding battery status information is sent to the first processing module.
6. battery management system as claimed in claim 1, it is characterised in that：The slave also includes Insulation monitoring unit；Institute
Insulation monitoring unit is stated to be used to detect insulation resistance value of the battery bag to car body, and by the battery bag collected to the exhausted of car body
Edge resistance is sent to the first processing module.
7. battery management system as claimed in claim 1, it is characterised in that：The battery status information of the battery module includes
Voltage, electric current, internal resistance and the temperature of the battery module.
8. battery management system as claimed in claim 1, it is characterised in that：The multiple collecting unit is in the form of queue solid
Determine to be spaced battery status information corresponding to scheduled time transmission under baud rate successively.
9. a kind of electric automobile, including battery bag and car-mounted terminal；It is characterized in that：The electric automobile also includes such as right
It is required that in 1-8 any one battery management system；The battery management system and the battery bag and the car-mounted terminal phase
Even.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710957050.2A CN107871909A (en) | 2017-10-16 | 2017-10-16 | Electric automobile and its battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710957050.2A CN107871909A (en) | 2017-10-16 | 2017-10-16 | Electric automobile and its battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107871909A true CN107871909A (en) | 2018-04-03 |
Family
ID=61753193
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710957050.2A Pending CN107871909A (en) | 2017-10-16 | 2017-10-16 | Electric automobile and its battery management system |
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| Country | Link |
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| CN (1) | CN107871909A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017382A (en) * | 2018-08-01 | 2018-12-18 | 奇瑞汽车股份有限公司 | Battery management method, device and the storage medium of electric car |
| CN109103522A (en) * | 2018-08-23 | 2018-12-28 | 江苏罗思韦尔电气有限公司 | A kind of battery management system |
| CN109888864A (en) * | 2019-02-25 | 2019-06-14 | 宁德时代新能源科技股份有限公司 | Battery management system |
| CN111693883A (en) * | 2019-03-14 | 2020-09-22 | 联合汽车电子有限公司 | Battery state detection system and method and vehicle |
-
2017
- 2017-10-16 CN CN201710957050.2A patent/CN107871909A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109017382A (en) * | 2018-08-01 | 2018-12-18 | 奇瑞汽车股份有限公司 | Battery management method, device and the storage medium of electric car |
| CN109103522A (en) * | 2018-08-23 | 2018-12-28 | 江苏罗思韦尔电气有限公司 | A kind of battery management system |
| CN109888864A (en) * | 2019-02-25 | 2019-06-14 | 宁德时代新能源科技股份有限公司 | Battery management system |
| US11095132B2 (en) | 2019-02-25 | 2021-08-17 | Contemporary Amperex Technology Co., Limited | Battery management system |
| CN111693883A (en) * | 2019-03-14 | 2020-09-22 | 联合汽车电子有限公司 | Battery state detection system and method and vehicle |
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180403 |
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| WD01 | Invention patent application deemed withdrawn after publication |