CN106405344A - Dynamic battery insulation detecting system and the working method thereof - Google Patents
Dynamic battery insulation detecting system and the working method thereof Download PDFInfo
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- CN106405344A CN106405344A CN201610707359.1A CN201610707359A CN106405344A CN 106405344 A CN106405344 A CN 106405344A CN 201610707359 A CN201610707359 A CN 201610707359A CN 106405344 A CN106405344 A CN 106405344A
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- resistance
- insulation
- cell
- battery
- acquisition module
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- 238000009413 insulation Methods 0.000 title claims abstract description 67
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000012545 processing Methods 0.000 claims abstract description 28
- 230000008569 process Effects 0.000 claims abstract description 8
- 238000001514 detection method Methods 0.000 claims description 33
- 238000012544 monitoring process Methods 0.000 claims description 32
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 4
- 238000009825 accumulation Methods 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 4
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- 230000005611 electricity Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 claims description 3
- 238000004364 calculation method Methods 0.000 claims 1
- 239000000178 monomer Substances 0.000 abstract 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 240000007320 Pinus strobus Species 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005779 cell damage Effects 0.000 description 1
- 208000037887 cell injury Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000003708 edge detection Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/025—Measuring very high resistances, e.g. isolation resistances, i.e. megohm-meters
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/08—Measuring resistance by measuring both voltage and current
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Resistance Or Impedance (AREA)
Abstract
The invention discloses a dynamic battery insulation detecting system and the working method thereof. The system comprises a battery monomer acquisition module, an insulation detecting module, and a central processor. The central processor is communicatively connected with the battery monomer acquisition module and the insulation detecting module. The working method comprises the following steps. The battery monomer acquisition module sends the battery monomer voltage data to the central processor; the insulation acquisition module sends the acquired insulation detecting data to the central processor; the central processor utilizes an insulation detecting algorithm to process the acquired battery monomer voltage data and the insulation detecting data and based on the processing result, sends a control instruction, warning information, and etc. According to the invention, it is possible to accurately calculate the insulation resistance of a dynamic battery so as to protect the safety of the battery and the people. The algorithm also has wide application prospects. In addition, the hardware circuit is simple and reliable. Cost-effective, the system and the method are capable of accurately calculating the insulation resistance and ensuring the reliability and security of the battery.
Description
Technical field
The present invention relates to battery management system field, particularly to a kind of power cell insulation detection system and work side
Method.
Background technology
With social development, be used lithium battery more and more extensive as the application of power, electric automobile, electric motorcycle,
Electronic vista car, back power supply etc. are occurred as the product of its power output in succession using lithium battery.In numerous applications
In, it is required for ensureing the safe handling of electrokinetic cell, wherein Insulation monitoring change is even more important.
During electrokinetic cell uses, inevitably run into the problems such as insulate weak or even short-circuit, this will
Cause cell damage or even fire, jeopardize personal safety.Take a broad view of domestic current present situation, have two kinds of situations：1. electrokinetic cell is no exhausted
Edge detects function.2. electrokinetic cell has insulation module, but the resistance that Insulation monitoring algorithm calculates differs greatly with actual value.
Content of the invention
Goal of the invention：The invention aims to solving deficiency of the prior art, provide a kind of hardware circuit simple
Reliable, with low cost, insulating resistance value can accurately be calculated it is ensured that the electrokinetic cell of electrokinetic cell reliability and security
Insulation Inspection System and method of work.
Technical scheme：A kind of power cell insulation detection system of the present invention, including battery cell acquisition module, absolutely
Edge detection module, central processing unit, described central processing unit respectively with battery cell acquisition module, insulation monitoring module communication link
Connect；
Described battery cell acquisition module includes housing of power cell, the total positive pole of electrokinetic cell, the total negative pole of electrokinetic cell；
Described insulation monitoring module includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1, ADC inspection
Survey the testing circuit that mouth is constituted, described diode D1, resistance R4, resistance R3, resistance R2 be sequentially connected in series, described resistance R2 and power
The total negative pole of battery connects, and the centre of described resistance R3 and resistance R4 is connected with housing of power cell, and described resistance R1 two ends are respectively
It is connected with resistance R2, ADC detection mouth, shunt capacitance C1 between described ADC detection mouth and the total negative pole of electrokinetic cell；
Described central processing unit is communicated to connect by host computer with the ADC detection mouth of insulation monitoring module；
It is connected to insulaion resistance Riso between described housing of power cell and the total negative pole of electrokinetic cell.
Further, the positive pole of described diode D1 positive pole total with electrokinetic cell is connected, and negative pole is connected with resistance R4.
Further, for silicon diode and forward voltage drop tube is 0.7V to described diode D1.
The invention also discloses a kind of method of work carrying out power battery insulation detection using described system, including such as
Lower step：
S1, battery cell acquisition module collection battery cell voltage data by data accumulation, and send the data to
Central processor；
S2, insulation acquisition module pass through ADC detection mouth by the Insulation monitoring collecting data is activation to central processing unit；
Battery cell voltage data and Insulation monitoring number that S3, central processing unit are collected using Insulation monitoring algorithm process
According to, then according to process result send control command and warning message.
Further, in described step S3, Insulation monitoring algorithm is to first pass through the resistance R2 both end voltage detecting, meter
Calculate and pass through the electric current of resistance R2 and resistance R4 and the electricity of housing of power cell total positive pole and the total negative pole of electrokinetic cell to electrokinetic cell
Pressure, then calculating current is poor, draws insulaion resistance calculating value；Last central processing unit exports accurate insulating resistance value.
Beneficial effect：The present invention gathers battery cell voltage data and by data accumulation by battery cell acquisition module,
And sending the data to central processing unit, insulation acquisition module passes through ADC detection mouth by the Insulation monitoring collecting data is activation
To central processing unit, battery cell voltage data and Insulation monitoring that central processing unit is collected using Insulation monitoring algorithm process
Data, then sends control command and warning message according to the result processing.The circuit of the present invention and software are relatively easy, power consumption
Relatively low, it is possible to achieve on-line checking, improve the reliability and safety of battery management system.
The resistance R1 of the present invention is connected with ADC detection mouth and shields；Between ADC detection mouth and the total negative pole of electrokinetic cell
Shunt capacitance C1 strobes；The acting as of diode D1 prevents the total positive pole of electrokinetic cell and this two poles of the earth of the total negative pole of electrokinetic cell
Reversed；Resistance R2, resistance R3, resistance R4 mainly realize voltage effect.
The power cell insulation detection system of the application present invention and method of work, can accurately calculate power battery insulation
Resistance, reaches the purpose of protection battery and personal safety, this algorithm has broad application prospects, and hardware circuit simply may be used
Lean on, with low cost, insulation resistance value can accurately be calculated it is ensured that the reliability of battery and security.
Brief description
Fig. 1 is that the system of the present invention connects block diagram.
Fig. 2 is battery cell acquisition module and the insulation monitoring module attachment structure schematic diagram of the present invention.
Fig. 3 is the workflow block diagram of the present invention.
Specific embodiment
Hereinafter embodiments of the present invention are illustrated by particular specific embodiment, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
As depicted in figs. 1 and 2, a kind of power cell insulation detection system, including battery cell acquisition module, Insulation monitoring
Module, central processing unit, central processing unit is communicated to connect with battery cell acquisition module, insulation monitoring module respectively.
Battery cell acquisition module includes housing of power cell, the total positive pole of electrokinetic cell, the total negative pole of electrokinetic cell.
Insulation monitoring module includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1, ADC detection mouth
The testing circuit constituting, diode D1, resistance R4, resistance R3, resistance R2 are sequentially connected in series, and resistance R2 is with the total negative pole of electrokinetic cell even
Connect, the centre of resistance R3 and resistance R4 is connected with housing of power cell, resistance R1 two ends are respectively with resistance R2, ADC detection mouth even
Connect, shunt capacitance C1 between ADC detection mouth and the total negative pole of electrokinetic cell.
Central processing unit is communicated to connect by host computer with the ADC detection mouth of insulation monitoring module.
It is connected to insulaion resistance Riso between housing of power cell and the total negative pole of electrokinetic cell.
As the optimization further to the technical program, the positive pole of diode D1 positive pole total with electrokinetic cell is connected, negative pole
It is connected with resistance R4.For silicon diode and forward voltage drop tube is 0.7V to diode D1.
As shown in figure 3, a kind of the invention also discloses work carrying out power battery insulation detection using described system
Method, comprises the steps：
S1, battery cell acquisition module collection battery cell voltage data by data accumulation, and send the data to
Central processor；
S2, insulation acquisition module pass through ADC detection mouth by the Insulation monitoring collecting data is activation to central processing unit；
Battery cell voltage data and Insulation monitoring number that S3, central processing unit are collected using Insulation monitoring algorithm process
According to, then according to process result send control command and warning message.
Preferably, Insulation monitoring algorithm is to first pass through the resistance R2 both end voltage detecting in step S3, calculate logical
Cross the electric current of resistance R2 and resistance R4 and the voltage of housing of power cell total positive pole and the total negative pole of electrokinetic cell to electrokinetic cell, so
Calculating current is poor afterwards, draws insulaion resistance calculating value；Last central processing unit exports accurate insulating resistance value.
Embodiment
Access insulaion resistance Riso between housing of power cell and the total negative pole of electrokinetic cell, resistance is indefinite according to reality,
Gather the voltage U1 at resistance R2 two ends by insulation monitoring module, housing of power cell voltage-to-ground U2 can be calculated by formula
=U1/R2* (R2+R3), by the electric current I1=U1/R2 of resistance R2, by the electric current I2=(total-U2-0.7V of U) of resistance R4/
R4, then by the electric current Iiso=I2-I1 of insulaion resistance Riso, finally calculate insulaion resistance Riso=U2/Iiso, obtain standard
True insulating resistance value.
In the present embodiment, the resistance of resistance R1 is 1K Ω, and the resistance of resistance R2 is the resistance of 1.5K Ω, resistance R3 and resistance R4
It is worth for 51K Ω, electric capacity C1 is 1uF, the parameter of pressure 16V, diode D1 is 1A/1KV.Diode D1 is silicon diode and forward direction
Tube voltage drop is 0.7V.
The design principle of the present invention is by battery cell acquisition module collection battery cell voltage data and to tire out data
Plus, and sending the data to central processing unit, the Insulation monitoring collecting data is sent out by insulation acquisition module by ADC detection mouth
Give central processing unit, central processing unit is examined with insulation using the battery cell voltage data that Insulation monitoring algorithm process collects
Survey data, then control command and warning message are sent according to the result processing.The resistance R1 of the present invention is connected with ADC detection mouth
Shield；Between ADC detection mouth and the total negative pole of electrokinetic cell, shunt capacitance C1 strobes；Diode D1 act as
Prevent the total positive pole of electrokinetic cell and this two poles of the earth of the total negative pole of electrokinetic cell reversed；Resistance R2, resistance R3, resistance R4 mainly realize voltage
Partial pressure acts on.
The circuit of the present invention and software are relatively easy, and power consumption is relatively low, it is possible to achieve on-line checking, improve battery management system
The reliability and safety of system.
The power cell insulation detection system of the application present invention and method of work, can accurately calculate power battery insulation
Resistance, reaches the purpose of protection battery and personal safety, this algorithm has broad application prospects, and hardware circuit simply may be used
Lean on, with low cost, insulation resistance value can accurately be calculated it is ensured that the reliability of battery and security.
Above-mentioned specific embodiment, technology design only to illustrate the invention and architectural feature are familiar with this it is therefore intended that allowing
The stakeholder of technology can implement according to this, but above content is not intended to limit protection scope of the present invention, every according to this
Any equivalence changes or modification that bright Spirit Essence is made, all should fall under the scope of the present invention.
Claims (5)
1. a kind of power cell insulation detection system it is characterised in that：Including battery cell acquisition module, insulation monitoring module,
Central processing unit, described central processing unit is communicated to connect with battery cell acquisition module, insulation monitoring module respectively；
Described battery cell acquisition module includes housing of power cell, the total positive pole of electrokinetic cell, the total negative pole of electrokinetic cell；
Described insulation monitoring module includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1, ADC detection mouth
The testing circuit constituting, described diode D1, resistance R4, resistance R3, resistance R2 be sequentially connected in series, described resistance R2 and electrokinetic cell
Total negative pole connects, and the centre of described resistance R3 and resistance R4 is connected with housing of power cell, described resistance R1 two ends respectively with electricity
Resistance R2, ADC detection mouth connects, shunt capacitance C1 between described ADC detection mouth and the total negative pole of electrokinetic cell；
Described central processing unit is communicated to connect by host computer with the ADC detection mouth of insulation monitoring module；
It is connected to insulaion resistance Riso between described housing of power cell and the total negative pole of electrokinetic cell.
2. a kind of power cell insulation detection system according to claim 1 it is characterised in that：Described diode D1 is just
Pole positive pole total with electrokinetic cell is connected, and negative pole is connected with resistance R4.
3. a kind of power cell insulation detection system according to claim 1 it is characterised in that：Described diode D1 is silicon
Diode and forward voltage drop tube are 0.7V.
4. the system described in a kind of any one using claim 1-3 carries out the method for work of power battery insulation detection, its
It is characterised by：Comprise the steps：
S1, battery cell acquisition module gather battery cell voltage data and by data accumulation, and send the data to centre
Reason device；
S2, insulation acquisition module pass through ADC detection mouth by the Insulation monitoring collecting data is activation to central processing unit；
Battery cell voltage data and Insulation monitoring data that S3, central processing unit are collected using Insulation monitoring algorithm process,
Then control command and warning message are sent according to the result processing.
5. a kind of power cell insulation detection system according to claim 4 method of work it is characterised in that：Described step
In rapid S3, Insulation monitoring algorithm is to first pass through the resistance R2 both end voltage detecting, and calculates the electricity by resistance R2 and resistance R4
Stream and the voltage of housing of power cell total positive pole and the total negative pole of electrokinetic cell to electrokinetic cell, then calculating current is poor, draws absolutely
Edge resistance calculations value；Last central processing unit exports accurate insulating resistance value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707359.1A CN106405344A (en) | 2016-08-23 | 2016-08-23 | Dynamic battery insulation detecting system and the working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610707359.1A CN106405344A (en) | 2016-08-23 | 2016-08-23 | Dynamic battery insulation detecting system and the working method thereof |
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| Publication Number | Publication Date |
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| CN106405344A true CN106405344A (en) | 2017-02-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610707359.1A Pending CN106405344A (en) | 2016-08-23 | 2016-08-23 | Dynamic battery insulation detecting system and the working method thereof |
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Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202330670U (en) * | 2011-12-02 | 2012-07-11 | 北京普莱德新能源电池科技有限公司 | Insulation detection circuit for power battery system of electric vehicle |
| CN202339393U (en) * | 2011-12-14 | 2012-07-18 | 北京普莱德新能源电池科技有限公司 | Insulation detector of power battery system of electric vehicle |
| CN103033729A (en) * | 2012-11-26 | 2013-04-10 | 浙江高泰昊能科技有限公司 | Insulation detection circuit and detection method used for battery box |
| CN103163379A (en) * | 2013-03-07 | 2013-06-19 | 上海电气钠硫储能技术有限公司 | Insulation resistance testing loop for sodium-sulfur battery module |
| RU2488129C1 (en) * | 2012-01-19 | 2013-07-20 | Открытое акционерное общество "Научно-исследовательский и конструкторско-технологический институт подвижного состава" (ОАО "ВНИКТИ") | Method to measure resistance of insulation and to protect against short circuits to body in power circuits of diesel locomotives |
| CN203455462U (en) * | 2013-08-08 | 2014-02-26 | 许继集团有限公司 | Electric vehicle power battery pack insulation detection apparatus |
| CN104569597A (en) * | 2014-12-18 | 2015-04-29 | 北京新能源汽车股份有限公司 | Method and device for detecting insulation resistance of power battery |
| CN204389637U (en) * | 2014-12-18 | 2015-06-10 | 北京新能源汽车股份有限公司 | Electric high-voltage direct-current insulation detection circuit |
| CN105425155A (en) * | 2015-11-03 | 2016-03-23 | 惠州市蓝微新源技术有限公司 | High-voltage battery pack total voltage and insulation resistance detection circuit and detection method |
-
2016
- 2016-08-23 CN CN201610707359.1A patent/CN106405344A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202330670U (en) * | 2011-12-02 | 2012-07-11 | 北京普莱德新能源电池科技有限公司 | Insulation detection circuit for power battery system of electric vehicle |
| CN202339393U (en) * | 2011-12-14 | 2012-07-18 | 北京普莱德新能源电池科技有限公司 | Insulation detector of power battery system of electric vehicle |
| RU2488129C1 (en) * | 2012-01-19 | 2013-07-20 | Открытое акционерное общество "Научно-исследовательский и конструкторско-технологический институт подвижного состава" (ОАО "ВНИКТИ") | Method to measure resistance of insulation and to protect against short circuits to body in power circuits of diesel locomotives |
| CN103033729A (en) * | 2012-11-26 | 2013-04-10 | 浙江高泰昊能科技有限公司 | Insulation detection circuit and detection method used for battery box |
| CN103163379A (en) * | 2013-03-07 | 2013-06-19 | 上海电气钠硫储能技术有限公司 | Insulation resistance testing loop for sodium-sulfur battery module |
| CN203455462U (en) * | 2013-08-08 | 2014-02-26 | 许继集团有限公司 | Electric vehicle power battery pack insulation detection apparatus |
| CN104569597A (en) * | 2014-12-18 | 2015-04-29 | 北京新能源汽车股份有限公司 | Method and device for detecting insulation resistance of power battery |
| CN204389637U (en) * | 2014-12-18 | 2015-06-10 | 北京新能源汽车股份有限公司 | Electric high-voltage direct-current insulation detection circuit |
| CN105425155A (en) * | 2015-11-03 | 2016-03-23 | 惠州市蓝微新源技术有限公司 | High-voltage battery pack total voltage and insulation resistance detection circuit and detection method |
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Application publication date: 20170215 |