CN206074728U - A kind of battery management system insulation detecting circuit - Google Patents
A kind of battery management system insulation detecting circuit Download PDFInfo
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- CN206074728U CN206074728U CN201620923735.6U CN201620923735U CN206074728U CN 206074728 U CN206074728 U CN 206074728U CN 201620923735 U CN201620923735 U CN 201620923735U CN 206074728 U CN206074728 U CN 206074728U
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- electrokinetic cell
- management system
- battery management
- cell
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Abstract
The utility model discloses a kind of battery management system insulation detecting circuit, including housing of power cell, the total positive pole of electrokinetic cell, the total negative pole of electrokinetic cell, detection circuit includes resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1, ADC detection mouth.The total positive pole of electrokinetic cell is connected with the diode D1 of series connection, resistance R4, resistance R3, resistance R2 in turn, and resistance R2 is connected with the total negative pole of electrokinetic cell.The middle connection of housing of power cell and resistance R3 and resistance R4.Resistance R1 two ends are connected with resistance R2, ADC detection mouth respectively, shunt capacitance C1 between ADC detection mouths and the total negative pole of electrokinetic cell.This utility model is when insulation weakness occur in housing of power cell and the two poles of the earth; ADC detection mouths can detect insulation system voltage; transmitting control commands and warning message, prevent cell damage and protection personal safety, improve the reliability and safety of battery management system in time.
Description
Technical field
This utility model is related to battery management system field, more particularly to a kind of battery management system insulation detecting circuit.
Background technology
When using electrokinetic cell bag, due to electrokinetic cell voltage it is of a relatively high, once there are electrical core of power battery the two poles of the earth
Or whole group battery the two poles of the earth and housing insulation weakness or even short circuit, it is inevitable that electric leakage occurs, damage battery and even injure the person
Security problems.
Battery management system existing on the market generally adopts two kinds of Insulation monitoring modes at present：Leakage Method and balance electricity
Bridge method.Leakage Method is to detect leakage current to calculate earth resistance by leakage current sensor, and this detection method has its shortcoming,
The electric leakage of battery side can only mainly be detected, it is impossible to the electric leakage of detection one side bus of load, use magnetic modulation sensor at present
Measurement leakage current, magnetic modulation sensor power consumption are relatively large.In order to obtain larger loop current, the resistance of loop resistance can not
Choosing is too big, and its certainty of measurement is larger by temperature, influence of leakage current, and detection sensitivity is limited, wrong report or failing to report phenomenon easily occurs.It is flat
Weighing apparatus bridge method is that alternately break-makes list a linear equation in two unknowns by controlling two switches, and chip solution this equation obtains positive and negative mother
Line resistance to earth.The method advantage is that system power dissipation is little, but has the disadvantage that software and circuit are relative complex.
Utility model content
Utility model purpose：The purpose of this utility model is to solve deficiency of the prior art, there is provided a kind of circuit
Simply, power consumption is relatively low, it is possible to achieve on-line checking, improves the battery management system of the reliability and safety of battery management system
System insulation detecting circuit.
Technical scheme：A kind of battery management system insulation detecting circuit described in the utility model, including electrokinetic cell shell
The total positive pole of body, electrokinetic cell, the total negative pole of electrokinetic cell, the detection circuit include resistance R1, resistance R2, resistance R3, resistance R4,
Electric capacity C1, diode D1, ADC detection mouth；
The total positive pole of the electrokinetic cell is connected with the diode D1 of series connection, resistance R4, resistance R3, resistance R2 in turn, described
Resistance R2 is connected with the total negative pole of electrokinetic cell；
The middle connection of the housing of power cell and resistance R3 and resistance R4；
The resistance R1 two ends are connected with resistance R2, ADC detection mouth respectively, and the ADC detection mouths are always born with electrokinetic cell
Shunt capacitance C1 between pole.
Further, the positive pole of the diode D1 is connected with the total positive pole of electrokinetic cell, and negative pole is connected with resistance R4.
Further, the diode D1 is silicon diode and forward voltage drop tube is 0.7V.
Further, the ADC detection mouths include main control chip.
Beneficial effect：The battery management system insulation detecting circuit of this utility model design, by ADC detection mouths detection electricity
Resistance R2 both end voltages, can calculate by the electric current and housing of power cell of resistance R2 and resistance R4 to the total positive pole of electrokinetic cell and
The voltage of the total negative pole of electrokinetic cell, then calculating current is poor, and the resistance for accessing resistance can be just calculated finally by Ohm's law.
Using battery management system insulation detecting circuit of the present utility model, advantage is that circuit and software are relatively easy, and power consumption is relatively low, can
To realize on-line checking, the reliability and safety of battery management system is improve.
Resistance R1 of the present utility model is connected with ADC detection mouths and shields；ADC detection mouths and the total negative pole of electrokinetic cell
Between shunt capacitance C1 strobe；The acting as of diode D1 prevent the total positive pole of electrokinetic cell and the total negative pole of electrokinetic cell this
The two poles of the earth are reversed；Resistance R2, resistance R3, resistance R4 mainly realize that voltage is acted on.
This utility model housing of power cell and the two poles of the earth occur insulation it is weak when, the main control chip of ADC detection mouths can be with
Detection collection insulation system voltage, timely transmitting control commands and warning message, prevent cell damage and protection personal safety, carry
The high reliability and safety of battery management system.
Description of the drawings
Fig. 1 is circuit connection diagram of the present utility model.
Specific embodiment
Embodiments of the present invention are illustrated by particular specific embodiment below, those skilled in the art can be by this explanation
Content disclosed by book understands other advantages and effect of the present invention easily.
Embodiment
As shown in figure 1, a kind of battery management system insulation detecting circuit, including housing of power cell, electrokinetic cell are always just
Pole, the total negative pole of electrokinetic cell, detection circuit include resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1, ADC
Detection mouth.The total positive pole of electrokinetic cell is connected with the diode D1 of series connection, resistance R4, resistance R3, resistance R2 in turn, resistance R2 with it is dynamic
The total negative pole connection of power battery.The middle connection of housing of power cell and resistance R3 and resistance R4.
Resistance R1 two ends are connected with resistance R2, ADC detection mouth respectively, between ADC detection mouths and the total negative pole of electrokinetic cell simultaneously
Connection electric capacity C1.
Used as the further optimization to the technical program, the positive pole of diode D1 is connected with the total positive pole of electrokinetic cell, negative pole
It is connected with resistance R4.Diode D1 is silicon diode and forward voltage drop tube is 0.7V.ADC detection mouths include main control chip.This reality
It is connected with ADC detection mouths with new resistance R1 and is shielded；Shunt capacitance between ADC detection mouths and the total negative pole of electrokinetic cell
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；Electricity
Resistance R2, resistance R3, resistance R4 mainly realize that voltage is acted on.
The operation principle of the battery management system insulation detecting circuit of this utility model design is detected by ADC detection mouths
Resistance R2 both end voltages, can calculate by the electric current and housing of power cell of resistance R2 and resistance R4 to the total positive pole of electrokinetic cell
With the voltage of the total negative pole of electrokinetic cell, then calculating current is poor, and the resistance for accessing resistance can be just calculated finally by Ohm's law
Value.
Using battery management system insulation detecting circuit of the present utility model, advantage is that circuit and software are relatively easy, work(
Consumption is relatively low, it is possible to achieve on-line checking, improves the reliability and safety of battery management system.
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, and the parameter of pressure 16V, diode D1 is 1A/1KV.Diode D1 is silicon diode and forward direction
Tube voltage drop is 0.7V.
If the operation principle of the present embodiment is that the total negative pole of electrokinetic cell is weak with housing of power cell insulation, this is just quite
In their an indirect resistance Riso, the voltage U1 at resistance R2 two ends can be gathered by ADC detection mouths, can by formula
To calculate housing of power cell voltage-to-ground U2=U1/R2* (R2+R3), by the electric current I1=U1/R2 of resistance R2, by electricity
Electric current I2=(total-U2-0.7V of the U)/R4 of resistance R4, then by the electric current Iiso=I2-I1 of Riso, finally calculate insulation resistance
Riso=U2/Iiso.
This utility model housing of power cell and the two poles of the earth occur insulation it is weak when, the main control chip of ADC detection mouths can be with
Detection collection insulation system voltage, timely transmitting control commands and warning message, prevent cell damage and protection personal safety, carry
The high reliability and safety of battery management system.
Above-mentioned specific embodiment, only illustrates technology design of the present utility model and architectural feature, it is therefore intended that allow ripe
The stakeholder for knowing technique can implement according to this, but above content is not intended to limit protection domain of the present utility model, every
Any equivalence changes made according to spirit of the present utility model or modification, all should fall into protection domain of the present utility model
Within.
Claims (4)
1. a kind of battery management system insulation detecting circuit, including the total positive pole of housing of power cell, electrokinetic cell, electrokinetic cell be total
Negative pole, it is characterised in that：It is described detection circuit include resistance R1, resistance R2, resistance R3, resistance R4, electric capacity C1, diode D1,
ADC detection mouths；
The total positive pole of the electrokinetic cell is connected with the diode D1 of series connection, resistance R4, resistance R3, resistance R2, the resistance in turn
R2 is connected with the total negative pole of electrokinetic cell；
The middle connection of the housing of power cell and resistance R3 and resistance R4；
The resistance R1 two ends are connected with resistance R2, ADC detection mouth respectively, the ADC detection mouths and the total negative pole of electrokinetic cell it
Between shunt capacitance C1.
2. a kind of battery management system insulation detecting circuit according to claim 1, it is characterised in that：The diode D1
Positive pole be connected with the total positive pole of electrokinetic cell, negative pole is connected with resistance R4.
3. a kind of battery management system insulation detecting circuit according to claim 1, it is characterised in that：The diode D1
It is 0.7V for silicon diode and forward voltage drop tube.
4. a kind of battery management system insulation detecting circuit according to claim 1, it is characterised in that：The ADC detections
Mouth includes main control chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923735.6U CN206074728U (en) | 2016-08-23 | 2016-08-23 | A kind of battery management system insulation detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620923735.6U CN206074728U (en) | 2016-08-23 | 2016-08-23 | A kind of battery management system insulation detecting circuit |
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| Publication Number | Publication Date |
|---|---|
| CN206074728U true CN206074728U (en) | 2017-04-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620923735.6U Active CN206074728U (en) | 2016-08-23 | 2016-08-23 | A kind of battery management system insulation detecting circuit |
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| CN (1) | CN206074728U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507546A (en) * | 2018-11-06 | 2019-03-22 | 云南云铝涌鑫铝业有限公司 | The detection circuit of aluminium electrolytic cell crust-breaking cylinder and insulation detecting method based on pressure difference |
-
2016
- 2016-08-23 CN CN201620923735.6U patent/CN206074728U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109507546A (en) * | 2018-11-06 | 2019-03-22 | 云南云铝涌鑫铝业有限公司 | The detection circuit of aluminium electrolytic cell crust-breaking cylinder and insulation detecting method based on pressure difference |
| CN109507546B (en) * | 2018-11-06 | 2021-03-05 | 云南云铝涌鑫铝业有限公司 | Detection circuit of crust breaking cylinder of aluminum electrolytic cell and insulation detection method based on differential pressure |
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| GR01 | Patent grant | ||
| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: Dongshan Street East Road in Jiangning District of Nanjing City, Qi Jiangsu province 210000 No. 6 Dongshan International Business Development Park C2 building 3 floor Co-patentee after: Nanjing Hong Kong Electronic Technology Co. Ltd. Patentee after: Nanjing power Limited by Share Ltd in Hong Kong Address before: 210000, Nanjing, Jiangsu Unicorn science and Technology Innovation Park Road, No. 300 Co-patentee before: Nanjing Hong Kong Electronic Technology Co. Ltd. Patentee before: Nanjing power Limited by Share Ltd in Hong Kong |