CN106842052A - Battery management system - Google Patents
Battery management system Download PDFInfo
- Publication number
- CN106842052A CN106842052A CN201710068916.4A CN201710068916A CN106842052A CN 106842052 A CN106842052 A CN 106842052A CN 201710068916 A CN201710068916 A CN 201710068916A CN 106842052 A CN106842052 A CN 106842052A
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- unit
- resistance
- amplifier
- management system
- battery management
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- 230000005611 electricity Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 2
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- 238000001914 filtration Methods 0.000 description 2
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- 238000005070 sampling Methods 0.000 description 1
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Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
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- General Physics & Mathematics (AREA)
- Secondary Cells (AREA)
Abstract
The present invention provides a kind of battery management system, including collecting unit, amplifier unit and control unit；Collecting unit is exported to amplifier unit for gathering the current signal of electrokinetic cell, and being translated into voltage signal；Amplifier unit is connected between collecting unit and control unit, for receiving the voltage signal of collecting unit output and exporting to control unit after being amplified to voltage signal；Control unit is used to receive the voltage signal amplified through amplifier unit, and judges whether collecting unit contacts well with amplifier unit according to the voltage signal for receiving；When battery management system is in running order, if the voltage signal that control unit is received is equal to the first preset value, judge that collecting unit is contacted well with amplifier unit；If the voltage signal that control unit is received is equal to the second preset value, collecting unit and amplifier unit loose contact are judged.The battery management system maintenance efficiency that the present invention is provided is high, while reducing human cost.
Description
【Technical field】
The present invention relates to electric vehicle engineering field, more particularly to a kind of battery management system.
【Background technology】
When electric automobile works, battery management system needs to adopt the charging and discharging currents of the electrokinetic cell of electric automobile
Collection.At present, current signal is acquired by current diverter or Hall current sensor mostly, will be then collected again
Current signal by given after signal condition MCU (Micro Control Unit, central processing unit) process.
Because Hall current sensor has obvious advantage in performance, battery management system is all adopted mostly at present
Current signal collection is carried out with Hall current sensor.Will be reported when current sampling circuit can not collect normal current signal
Mistake, and then cause electric automobile cisco unity malfunction.However, have various due to causing current sample exception, it is difficult to soon
Where speed finds problem, while need to tear open car investigation problem, and then cause that workload is larger, human cost is high and less efficient.
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 battery management system maintenance efficiency is high, reduces
Human cost.
To achieve these goals, the present invention provides a kind of battery management system, and it is applied in electric automobile, the electricity
Electrical automobile includes electrokinetic cell；The battery management system includes collecting unit, amplifier unit and control unit；The collection
Unit is used to gather the current signal of the electrokinetic cell, and the current signal that will be collected is converted into voltage signal and exports to institute
State amplifier unit；The amplifier unit is connected between the collecting unit and described control unit, and the amplifier unit is used for
The voltage signal of collecting unit output is received, and is exported to described control unit after being amplified to the voltage signal；
Described control unit is used to receive the voltage signal amplified through the amplifier unit, and according to the voltage letter for receiving
Number judge whether the collecting unit contacts well with the amplifier unit；When the battery management system is in running order
When, if the voltage signal that receives of described control unit is equal to the first preset value, judge the collecting unit with it is described
The contact of amplifier unit is good；If the voltage signal that described control unit is received is equal to the second preset value, judge described
Collecting unit and the amplifier unit loose contact.
In a preferred embodiment, first preset value is more than second preset value.
In a preferred embodiment, if the voltage signal that described control unit is received is preset more than first
Value, then judge that the electrokinetic cell is in charged state；If the voltage signal that described control unit is received is less than first
Preset value, then judge that the electrokinetic cell is in discharge condition.
In a preferred embodiment, the amplifier unit includes operational amplifier, first resistor, second resistance, the
Three resistance, the 4th resistance, the 5th resistance and the 6th resistance；One end of the first resistor is connected with the first power supply, and described
The other end of first resistor passes sequentially through the second resistance, the 3rd resistor and the 4th resistance and second source phase
Even；The collecting unit includes lead-out terminal, and the input terminal is connected between the second resistance and the 3rd resistor；
The input in the same direction of the operational amplifier is connected between the first resistor and the second resistance；The operational amplifier
Reverse input end pass through the 5th resistance eutral grounding；The output end of the operational amplifier is connected with described control unit；Institute
The one end for stating the 6th resistance is connected with the reverse input end of the operational amplifier, and the other end of the 6th resistance with it is described
The output end of operational amplifier is connected；The second voltage of the voltage more than second source output of the first power supply output.
In a preferred embodiment, the amplifier unit also includes the first electric capacity；One end of first electric capacity with
First power supply is connected, and the other end of first electric capacity is connected with the in-phase input end of the operational amplifier.
In a preferred embodiment, the amplifier unit also includes the second electric capacity；One end of second electric capacity with
The reverse input end of the operational amplifier is connected, and the other end and the operational amplifier of second electric capacity output end
It is connected.
In a preferred embodiment, the battery management system also bag filter unit；It is right that the filter unit is used for
The voltage signal after the amplifier unit amplifies is filtered rear and exports to described control unit.
In a preferred embodiment, the filter unit includes the 7th resistance and the 3rd electric capacity；7th electricity
One end of resistance is connected with the amplifier unit, and the other end of the 7th resistance passes through the 3rd capacity earth.
In a preferred embodiment, the battery management system also includes clamping unit；The clamping unit connection
Between the amplifier unit and described control unit；The clamping unit is used for by the institute after amplifier unit amplification
Voltage signal is stated to be clamped in preset range and export to described control unit.
In a preferred embodiment, the clamping unit includes the first diode and the second diode；Described
The negative electrode of the plus earth of one diode and first diode is connected with second diode anode；Two or two pole
The negative electrode of pipe is connected with tertiary voltage source；The anode of the negative electrode of first diode and second diode also respectively with institute
Amplifier unit is stated to be connected.
The battery management system that the present invention is provided, voltage that described control unit can be received according to it judge described in adopt
Whether collection unit contacts well with the amplifier unit, can be investigated without tearing car open, and then improve where quick positioning question
Maintenance efficiency and reduce human cost.
【Brief description of the drawings】
The functional block diagram of the battery management system that Fig. 1 is provided for the present invention.
The circuit theory diagrams of the battery management system that Fig. 2 is provided for the present invention.
【Specific embodiment】
In order that the purpose of the present invention, technical scheme and Advantageous Effects become apparent from understanding, below in conjunction with accompanying drawing and
Specific embodiment, the present invention will be described in further detail.It should be appreciated that the specific implementation described in this specification
Mode is not intended to limit the present invention just for the sake of explaining the present invention.
Fig. 1 is referred to, the functional block diagram of its battery management system 100 provided for the present invention.The battery management system
System 100 is applied in electric automobile, and the electric automobile includes being provided for it electrokinetic cell (not shown) of power.Further
Ground, the battery management system 100 includes collecting unit 10, amplifier unit 20, filter unit 30, clamping unit 40 and control
Unit 50.
The collecting unit 10 is used to be acquired the charging and discharging currents of the electrokinetic cell, and the electric current that will be collected
Signal is converted into voltage signal and exports to the amplifier unit 20.In the present embodiment, the collecting unit 10 is Hall electricity
Flow sensor.
The amplifier unit 20 is connected between the collecting unit 10 and the filter unit 30.The amplifier unit 20
Voltage signal for receiving the output of the collecting unit 10, and export after being amplified to the voltage signal.
The filter unit 30 is used to receive the voltage signal of the output of amplifier unit 20, and the voltage signal is entered
Exported to the clamping unit 40 after row filtering.
The clamping unit 40 is connected between the filter unit 30 and described control unit 50.The clamping unit 40
Exported to described control unit 50 for the filtered voltage signal to be clamped in preset range.In present embodiment
In, the preset range is 0V~3.3V.Because be clamped to for the voltage signal after after filtering by the clamping unit 40
Between 0V~3.3V, so cause no matter the magnitude of voltage of the amplifier unit 20 output why, will not be by described control unit
50 damage.
Described control unit 50 is used to receive by the voltage signal of clamper, and sentences according to the voltage signal for receiving
Whether the disconnected collecting unit 10 contacts well with the amplifier unit 20.Specifically, when the battery management system 100 is in
During working condition, if the voltage signal by clamper that described control unit 50 is received is equal to the first preset value, sentence
The disconnected collecting unit 10 is contacted well with the amplifier unit 20.If the institute by clamper that described control unit 50 is received
Voltage signal is stated equal to the second preset value, then judges the collecting unit 10 with the amplifier unit 20 loose contact.For example, institute
Stating collecting unit (Hall current sensor) 10 may contact because of reasons such as vibrations, oxidation and corrosion with the distant place unit 20
It is bad.In the present embodiment, first preset value is more than second preset value.It is appreciated that in the first preset value or
Voltage signal in the error range of the positive and negative 0.1V of the second preset value described in person, may determine that be with first preset value or
The second preset value is equal described in person.In the present embodiment, described control unit is MCU (Micro Control Unit, micro-control
Unit processed).
Further, if the voltage signal by clamper that described control unit 50 is received is preset more than first
Value, then judge that the electrokinetic cell is in charged state.If the voltage by clamper that described control unit 50 is received
Signal is less than the first preset value, then judge that the electrokinetic cell is in discharge condition.Therefore, the cell tube of offer of the present invention
Reason system 100 can also collect the discharge and recharge shape that the current signal judges the electrokinetic cell according to the collecting unit 10
State.
Additionally, before being come into operation after the production of the battery management system 100, if the warp that described control unit 50 is received
The voltage signal for crossing clamper is equal to the second preset value, then judge the amplifier unit 20, filter unit 30 and the pincers
Bit location 40 is in normal condition.It is to be appreciated that it is described when the battery management system 100 production after come into operation before simultaneously
It is not connected with the collecting unit 10.Therefore, the battery management system 100 of offer of the present invention produce electricity when without needs
Put into the test amplifier unit 20, filter unit 30 and the clamping unit by substantial amounts of tooling device and human cost
Whether 50 is normal.
Referring again to Fig. 2, it is the circuit theory diagrams of battery management system provided by the present invention 100.The amplifier list
Unit 20 include operational amplifier U1, first resistor R1, second resistance R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5 with
And the 6th resistance R6.One end of the first resistor R1 is connected with the first power supply VCC1, and the first resistor R1 the other end
Pass sequentially through the second resistance R2, the 3rd resistor R3 and the 4th resistance R4 to be connected with second source VCC2, also
That is, described first resistor R1, the second resistance R2, the 3rd resistor R3 and the 4th resistance R4 are series at described
Between one power supply VCC1 and the second source VCC2.The collecting unit 10 includes lead-out terminal 11, the input terminal 11
It is connected between the second resistance R2 and the 3rd resistor R3.The input in the same direction of the operational amplifier U1 is connected to institute
State between first resistor R1 and the second resistance R2；The reverse input end of the operational amplifier U1 passes through the 5th resistance
Ground connection；The output end of the operational amplifier U1 is connected with the filter unit.One end of the 6th resistance R6 and the fortune
The reverse input end for calculating amplifier U1 is connected, and the other end and the operational amplifier U1 of the 6th resistance R6 output end
It is connected.In the present embodiment, the resistance of the first resistor R1 is equal to the resistance of the 4th resistance R4；The second resistance R2's
Resistance is equal to the resistance of the 3rd resistor R3.Resistance of the resistance of the 5th resistance R5 more than the 6th resistance R6.Institute
State the second voltage of the first voltage more than second source VCC2 outputs of the first power supply VCC1 outputs.Specifically, described
One voltage is 1.65V, and the second voltage is -15V.
Further, the amplifier unit 20 also includes the first electric capacity C1.One end of the first electric capacity C1 and described
One power supply VCC1 is connected, and the other end of the first electric capacity C1 is connected with the in-phase input end of the operational amplifier U1.
Further, the amplifier unit 20 also includes the second electric capacity C2.One end of the second electric capacity C2 and the fortune
The reverse input end for calculating amplifier U1 is connected, and the other end and the operational amplifier U1 of the second electric capacity C2 output end
It is connected.
The filter unit 30 includes the 7th resistance R7 and the 3rd electric capacity C3.One end of the 7th resistance R7 with it is described
The output end of operational amplifier U1 is connected, and the other end of the 7th resistance R7 is grounded by the 3rd electric capacity C3.
The clamping unit 40 includes the first diode D1 and the second diode D2.The anode of the first diode D1
It is grounded and the negative electrode of the first diode D1 is connected with the second diode D2 anodes.The negative electrode of the second diode D2
It is connected with tertiary voltage source VCC3.The output end of the operational amplifier U1 is also connected to described by the 7th resistance R7
Between the anode of the negative electrode of one diode D1 and the second diode D2.In the present embodiment, the 3rd power supply VCC3
For exporting tertiary voltage, the tertiary voltage is 3.3V.
Described control unit 50 includes input terminal 51.The input terminal 51 is connected to the moon of the first diode D1
Between the anode of pole and the second diode D2.
The operation principle of the battery management system 100 is as follows：
When the collecting unit 10 is with 20 loose contact of amplifier unit, the output end institute of the operational amplifier U1
The calculation of the voltage Uo of output is as follows：
The first power supply VCC1 is considered as ground connection first, now, the electricity of the output end output of the operational amplifier U1
Pressure U1=[VCC2*R1/ (R1+R2+R3+R4)] * (1+R6/R5)；Then the second source VCC2 is considered as ground connection, now,
Voltage U2=[VCC1-VCC1*R1/ (R1+R2+R3+R4)] * (1+R6/R5) of the output end output of the operational amplifier U1.
Uo1=U1+U2 can be drawn by superposition theorem, due to the first resistor R1~the 6th resistance R6 value, it is known that because
This, Uo1 now is the second preset value.
When the collecting unit 10 contacts good with the amplifier unit 20, the output end of the operational amplifier U1 is defeated
The calculation of the voltage Uo for going out is as follows：
The lead-out terminal 11 of the collecting unit 10 is considered as ground connection first, now, the output of the operational amplifier U1
Hold voltage U3=VCC1*R2/ (R1+R2) * (1+R6/R5) of output；Then the first power supply VCC1 is considered as ground connection, now, institute
State voltage U4=Ui*R1/ (R1+R2) * (1+R6/R5) of the output end output of operational amplifier U1.Can be obtained by superposition theorem
Go out Uo2=U3+U4, because the value of the first resistor R1~the 6th resistance R6 is, it is known that therefore, Uo2 now is
First preset value.Further, when the electrokinetic cell is in charged state, the output positive voltage of the collecting unit 10；When
When the electrokinetic cell is in discharge condition, the output negative voltage of the collecting unit 10.
The battery management system 100 that the present invention is provided, the voltage that described control unit 50 can be received according to it judges
Whether the collecting unit 10 contacts well with the amplifier unit 20, can where quick positioning question, without tearing car investigation open,
And then improve maintenance efficiency and reduce human cost.
The present invention is not restricted to described in specification and implementation method, therefore for the personnel of familiar field
Additional advantage and modification are easily achieved, therefore in the essence of the universal limited without departing substantially from claim and equivalency range
In the case of god and scope, the present invention is not limited to specific details, representational equipment and shown here as the diagram with description
Example.
Claims (10)
1. a kind of battery management system, it is applied in electric automobile, and the electric automobile includes electrokinetic cell；Its feature exists
In：The battery management system includes collecting unit, amplifier unit and control unit；The collecting unit is used to gather described
The current signal of electrokinetic cell, and the current signal that will be collected is converted into voltage signal and exports to the amplifier unit；It is described
Amplifier unit is connected between the collecting unit and described control unit, and the amplifier unit is used to receive the collecting unit
The voltage signal of output, and export to described control unit after being amplified to the voltage signal；Described control unit is used for
The voltage signal amplified through the amplifier unit is received, and judges that the collection is single according to the voltage signal for receiving
It is first whether to be contacted well with the amplifier unit；When the battery management system is in running order, if described control unit
The voltage signal for receiving is equal to the first preset value, then judge that the collecting unit is contacted well with the amplifier unit；
If the voltage signal that described control unit is received is equal to the second preset value, judge the collecting unit with the amplifier
Unit loose contact.
2. battery management system as claimed in claim 1, it is characterised in that：First preset value is preset more than described second
Value.
3. battery management system as claimed in claim 1, it is characterised in that：If the voltage that described control unit is received
Signal is more than the first preset value, then judge that the electrokinetic cell is in charged state；If it is described that described control unit is received
Voltage signal is less than the first preset value, then judge that the electrokinetic cell is in discharge condition.
4. battery management system as claimed in claim 1, it is characterised in that：The amplifier unit includes operational amplifier, the
One resistance, second resistance, 3rd resistor, the 4th resistance, the 5th resistance and the 6th resistance；One end of the first resistor and the
One power supply is connected, and the other end of the first resistor passes sequentially through the second resistance, the 3rd resistor and described the
Four resistance are connected with second source；The collecting unit includes lead-out terminal, and the input terminal is connected to the second resistance
Between the 3rd resistor；The input in the same direction of the operational amplifier is connected to the first resistor with the second resistance
Between；The reverse input end of the operational amplifier passes through the 5th resistance eutral grounding；The output end of the operational amplifier with
Described control unit is connected；One end of 6th resistance is connected with the reverse input end of the operational amplifier, and described
The other end of six resistance is connected with the output end of the operational amplifier；The voltage of the first power supply output is more than described second
The second voltage of power supply output.
5. battery management system as claimed in claim 4, it is characterised in that：The amplifier unit also includes the first electric capacity；Institute
The one end for stating the first electric capacity is connected with first power supply, and the other end of first electric capacity is same with the operational amplifier
Phase input is connected.
6. battery management system as claimed in claim 4, it is characterised in that：The amplifier unit also includes the second electric capacity；Institute
The one end for stating the second electric capacity is connected with the reverse input end of the operational amplifier, and the other end of second electric capacity with it is described
The output end of operational amplifier is connected.
7. battery management system as claimed in claim 1, it is characterised in that：The battery management system also bag filter unit；
The voltage signal that the filter unit is used for after amplifying to the amplifier unit is filtered rear and exports to the control
Unit.
8. battery management system as claimed in claim 7, it is characterised in that：The filter unit includes the 7th resistance and the
Three electric capacity；One end of 7th resistance is connected with the amplifier unit, and the 7th resistance the other end by described the
Three capacity earths.
9. battery management system as claimed in claim 1, it is characterised in that：The battery management system also includes clamper list
Unit；The clamping unit is connected between the amplifier unit and described control unit；The clamping unit is used for will be by institute
The voltage signal after amplifier unit amplifies is stated to be clamped in preset range and export to described control unit.
10. battery management system as claimed in claim 9, it is characterised in that：The clamping unit include the first diode with
And second diode；The negative electrode of the plus earth of first diode and first diode and second diode sun
Extremely it is connected；The negative electrode of second diode is connected with tertiary voltage source；The negative electrode of first diode and the described 2nd 2
The anode of pole pipe is also connected with the amplifier unit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068916.4A CN106842052A (en) | 2017-02-08 | 2017-02-08 | Battery management system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710068916.4A CN106842052A (en) | 2017-02-08 | 2017-02-08 | Battery management system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106842052A true CN106842052A (en) | 2017-06-13 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710068916.4A Pending CN106842052A (en) | 2017-02-08 | 2017-02-08 | Battery management system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201935955U (en) * | 2010-10-19 | 2011-08-17 | 合肥国轩高科动力能源有限公司 | Total voltage detection circuit of battery pack |
| CN102331561A (en) * | 2011-09-16 | 2012-01-25 | 深圳桑达国际电子器件有限公司 | Battery voltage detection circuit and battery management system |
| CN104345281A (en) * | 2014-10-11 | 2015-02-11 | 苏州克兰兹电子科技有限公司 | Battery management system of electric automobile |
| WO2016101661A1 (en) * | 2014-12-22 | 2016-06-30 | 深圳市中兴微电子技术有限公司 | Battery capacity calculation system and method |
| CN106324332A (en) * | 2015-07-06 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Current sampling circuit of battery management system |
| CN206557354U (en) * | 2017-02-08 | 2017-10-13 | 深圳市沃特玛电池有限公司 | Battery management system |
-
2017
- 2017-02-08 CN CN201710068916.4A patent/CN106842052A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201935955U (en) * | 2010-10-19 | 2011-08-17 | 合肥国轩高科动力能源有限公司 | Total voltage detection circuit of battery pack |
| CN102331561A (en) * | 2011-09-16 | 2012-01-25 | 深圳桑达国际电子器件有限公司 | Battery voltage detection circuit and battery management system |
| CN104345281A (en) * | 2014-10-11 | 2015-02-11 | 苏州克兰兹电子科技有限公司 | Battery management system of electric automobile |
| WO2016101661A1 (en) * | 2014-12-22 | 2016-06-30 | 深圳市中兴微电子技术有限公司 | Battery capacity calculation system and method |
| CN106324332A (en) * | 2015-07-06 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Current sampling circuit of battery management system |
| CN206557354U (en) * | 2017-02-08 | 2017-10-13 | 深圳市沃特玛电池有限公司 | Battery management system |
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|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20191029 Address after: 518000 Shenyu Science and Technology Park, No. 68 Lanjingbei Road, Laokeng Community, Longtian Street, Pingshan District, Shenzhen City, Guangdong Province, 101 Applicant after: Shenzhen Anding New Energy Technology Development Co.,Ltd. Address before: 518000 Guangdong Province, Shenzhen City Pingshan Pingshan community Zhu Keng Industrial Zone 9 1-3 Applicant before: Shenzhen Optimum Battery Co.,Ltd. |
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