CN205539348U - Power battery's insulating detection circuitry - Google Patents
Power battery's insulating detection circuitry Download PDFInfo
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- CN205539348U CN205539348U CN201620115629.5U CN201620115629U CN205539348U CN 205539348 U CN205539348 U CN 205539348U CN 201620115629 U CN201620115629 U CN 201620115629U CN 205539348 U CN205539348 U CN 205539348U
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Abstract
The utility model discloses a power battery's insulating detection circuitry, the bridge type impedance network of circuit is including total anode ground resistance rg1, total negative terminal ground resistance rg2, third resistance R3, fourth resistance R4, controllable switch pipe TV1 and the 2nd controllable switch pipe TV2, with total anode ground resistance rg1 parallel connection behind resistance R3 and the controllable switch pipe TV1 component series branch, with total anode ground resistance rg2 parallel connection behind resistance R4 and the 2nd controllable switch pipe TV2 component series branch, controllable switch pipe TV1's control end, the 2nd controllable switch pipe TV2's control end should be connected with battery management system's the first signal control end, the 2nd signal control terminal pair respectively. Circuit structure is simple, and realizes with low costsly, can distinguish the resistance that quantitative approximate calculation goes out total anode ground resistance rg1 and total negative terminal ground resistance rg2, each other does not influence, and realizes with low costs, easy operation.
Description
Technical field
This utility model relates to power battery technology field, more specifically, relating to the insulation of electrokinetic cell
Testing circuit.
Background technology
Along with the application of electric automobile is more and more extensive, the safety of electric automobile becomes very important problem.
And be that electric automobile provides the electrokinetic cell insulating properties over the ground of power to be that electric automobile security performance is most important
One of aspect.In prior art, the method that the insulating properties detection over the ground of the electrokinetic cell of electric automobile is used
Usually use total voltage between " direct-flow positive pole bus and chassis " and " direct current negative electrode bus and chassis "
Dividing potential drop characterize the dc bus insulation degree relative to automobile chassis.But above-mentioned detection method cannot differentiate
Positive and negative bus synchronizes situation about reducing to chassis insulating properties, and is insulated in chassis by bus positive and negative to direct current
The situation that resistance differs greatly there will be the erroneous judgement of decreasing insulating.Therefore, existing electrokinetic cell is exhausted
Edge detection poor reliability, accuracy is low.
Utility model content
The purpose of this utility model is to overcome drawbacks described above of the prior art, it is provided that a kind of electrokinetic cell
Insulation detecting circuit, circuit structure is simple, and quantitative approximate calculation can go out total anode resistance to earth Rg1 respectively
And the resistance of total negative terminal resistance to earth Rg2.
For achieving the above object, the technical scheme that this utility model provides is as follows:
The insulation detecting circuit of electrokinetic cell, including:
Electrokinetic cell, is combined by multiple monomer battery cores,
Current acquisition module, the electric current in detection electrokinetic cell bus, and the transmitted to battery management system
One signal input part,
Voltage acquisition module, for gathering the voltage between total anode and total negative terminal, and transmits to battery management
The secondary signal input of system,
Bridge-type impedance network, including total anode resistance to earth Rg1, total negative terminal resistance to earth Rg2, the 3rd resistance
R3, the 4th resistance R4, the first controlled tr tube TV1 and the second controlled tr tube TV2, described resistance R3 and
It is connected in parallel with total anode resistance to earth Rg1 after first controlled tr tube TV1 composition series arm；Described electricity
It is connected in parallel with total anode resistance to earth Rg2 after resistance R4 and the second controlled tr tube TV2 composition series arm,
Described first controlled tr tube TV1 control end, the second controlled tr tube TV2 control end respectively with battery
First signal of management system controls end, secondary signal controls end correspondence and connects.
It is preferred that, the control end of the described first controlled tr tube TV1 first resistance R1 that connects is followed by electricity
First signal of pond management system controls end.
It is preferred that, the control end of the described second controlled tr tube TV2 second resistance R2 that connects is followed by electricity
The secondary signal of pond management system controls end.
It is preferred that, described current acquisition module uses diverter.
Compared with prior art, the beneficial effects of the utility model are:
The circuit structure that this utility model provides is simple, and can respectively quantitatively approximate calculation to go out total anode the most electric
Resistance Rg1 and the resistance of total negative terminal resistance to earth Rg2.
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below by right
In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below,
Accompanying drawing in description is embodiments more of the present utility model, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the schematic diagram of the insulation detecting circuit of this utility model embodiment medium power battery.
Detailed description of the invention
For making the purpose of this utility model embodiment, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in utility model embodiment, carries out clear, complete to the technical scheme in this utility model embodiment
Ground describes, it is clear that described embodiment is a part of embodiment of this utility model rather than whole realities
Execute example.Based on the embodiment in this utility model, those of ordinary skill in the art are not making creative labor
The every other embodiment obtained under dynamic premise, broadly falls into the scope of this utility model protection.
Embodiment 1
Embodiment 1 of the present utility model provides the insulation detecting circuit of a kind of electrokinetic cell.With reference to Fig. 1, institute
The insulation detecting circuit stating electrokinetic cell includes: electrokinetic cell, current acquisition module, current acquisition module and
Bridge-type impedance network.
Described electrokinetic cell is combined with certain series-parallel system by multiple monomer battery cores, for electric automobile
Power source is provided.
Described current acquisition block coupled in series is in total loop, for detecting the electric current in electrokinetic cell bus, and
The electricity of collection is streamed to the first signal input part C of battery management system (BMS).In the present embodiment,
Described current acquisition module uses diverter.
Described voltage acquisition module is for gathering the voltage between total anode and total negative terminal, and the voltage that will gather
Transmit the secondary signal input D to battery management system.
Described bridge-type impedance network includes: total anode resistance to earth Rg1, total negative terminal resistance to earth Rg2, first
Resistance R1, the second resistance R2, the 3rd resistance R3, the 4th resistance R4, the first controlled tr tube TV1 and
Two controlled tr tube TV2.After described resistance R3 and the first controlled tr tube TV1 composition series arm with total the most just
End resistance to earth Rg1 is connected in parallel；After described resistance R4 and the second controlled tr tube TV2 composition series arm
It is connected in parallel with total anode resistance to earth Rg2, the control end series connection first of described first controlled tr tube TV1
Resistance R1 is followed by the first signal of battery management system and controls end A, the control of described second controlled tr tube TV2
End processed connect the second resistance R2 be followed by battery management system secondary signal control end B.Described 3rd resistance R3,
4th resistance R4 is small resistor, and such as, the 3rd resistance R3, the 4th resistance R4 are milliohm level or Europe
The resistance of nurse level.And total anode over the ground, total negative terminal resistance good insulating time domain over the ground infinitely great, even if
When insulating properties is poor, resistance also meets: described total anode resistance to earth Rg1 > > 10* the 3rd resistance R3, always bears
End resistance to earth Rg2 > > 10* the 4th resistance R4.
The first controlled tr tube VT1 is closed when battery management system (BMS) controls end A by the first signal,
And when disconnecting the second controlled tr tube VT2 by secondary signal control end B, note now total anode and total negative terminal
Between voltage U01 and total current I01, now the resistance of the first controlled tr tube VT1 is negligible, its
In,
Uo1=I1* (Rg2+Rg1*R3/ (Rg1+R3)) (1)
Due to total anode resistance to earth Rg1 > > 10* the 3rd resistance R3, therefore total negative terminal resistance to earth Rg2 ≈ Uo1/I1
–R3。
The first controlled tr tube VT1 is disconnected when battery management system (BMS) controls end A by the first signal,
And when closing the second controlled tr tube VT2 by secondary signal control end B, note now total anode and total negative terminal
Between voltage U02 and total current I02, now the resistance of the second controlled tr tube VT2 is negligible, its
In,
Uo2=I2* (Rg1+Rg2*R4/ (Rg2+R4)) (2)
Due to total negative terminal resistance to earth Rg2 > > 10* the 4th resistance R4, therefore total anode resistance Rg1 ≈ Uo2/I2 over the ground
–R4。
This utility model provides the insulation detecting circuit of a kind of electrokinetic cell, and circuit structure is simple, and can divide
Not quantitatively approximate calculation goes out total anode resistance to earth Rg1 and the resistance of total negative terminal resistance to earth Rg2, the most not shadow
Ring, it is achieved low cost, simple to operate.
At this it should be noted that one of ordinary skill in the art will appreciate that and realize in above-described embodiment method
All or part of step can be by program and complete to instruct relevant hardware, described program is permissible
In being stored in a computer read/write memory medium, described storage medium, such as ROM/RAM, disk, light
Dish etc..
Above-described embodiment is this utility model preferably embodiment, but embodiment of the present utility model is not
Being restricted to the described embodiments, any of other is made without departing from spirit of the present utility model and principle are lower
Change, modify, substitute, combine, simplify, all should be the substitute mode of equivalence, be included in this practicality
Within novel protection domain.
Claims (4)
1. the insulation detecting circuit of electrokinetic cell, it is characterised in that including:
Electrokinetic cell, is combined by multiple monomer battery cores,
Current acquisition module, the electric current in detection electrokinetic cell bus, and the transmitted to battery management system
One signal input part,
Voltage acquisition module, for gathering the voltage between total anode and total negative terminal, and transmits to battery management
The secondary signal input of system,
Bridge-type impedance network, including total anode resistance to earth Rg1, total negative terminal resistance to earth Rg2, the 3rd resistance
R3, the 4th resistance R4, the first controlled tr tube TV1 and the second controlled tr tube TV2, described resistance R3
And first controlled tr tube TV1 composition series arm after be connected in parallel with total anode resistance to earth Rg1；Described
Resistance R4 and the second controlled tr tube TV2 is in parallel with total anode resistance to earth Rg2 after forming series arm to be connected
Connect, described first controlled tr tube TV1 control end, the second controlled tr tube TV2 control end respectively with
First signal of battery management system controls end, secondary signal controls end correspondence and connects.
The insulation detecting circuit of electrokinetic cell the most according to claim 1, it is characterised in that described
One controlled tr tube TV1 control end connect the first resistance R1 be followed by battery management system first signal control
End.
The insulation detecting circuit of electrokinetic cell the most according to claim 1, it is characterised in that described
Two controlled tr tube TV2 control end connect the second resistance R2 be followed by battery management system secondary signal control
End.
The insulation detecting circuit of electrokinetic cell the most according to claim 1, it is characterised in that described electricity
Stream acquisition module uses diverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620115629.5U CN205539348U (en) | 2016-02-04 | 2016-02-04 | Power battery's insulating detection circuitry |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620115629.5U CN205539348U (en) | 2016-02-04 | 2016-02-04 | Power battery's insulating detection circuitry |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205539348U true CN205539348U (en) | 2016-08-31 |
Family
ID=56776197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620115629.5U Active CN205539348U (en) | 2016-02-04 | 2016-02-04 | Power battery's insulating detection circuitry |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717433A (en) * | 2016-02-04 | 2016-06-29 | 惠州市蓝微新源技术有限公司 | Insulation detection circuit and insulation detection method of power cell |
-
2016
- 2016-02-04 CN CN201620115629.5U patent/CN205539348U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105717433A (en) * | 2016-02-04 | 2016-06-29 | 惠州市蓝微新源技术有限公司 | Insulation detection circuit and insulation detection method of power cell |
| CN105717433B (en) * | 2016-02-04 | 2019-01-29 | 惠州市蓝微新源技术有限公司 | The insulation detecting circuit and insulation detecting method of power battery |
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| GR01 | Patent grant |