CN109742743A - Wide scope high voltage samples clamping protective circuit - Google Patents
Wide scope high voltage samples clamping protective circuit Download PDFInfo
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- CN109742743A CN109742743A CN201811468042.2A CN201811468042A CN109742743A CN 109742743 A CN109742743 A CN 109742743A CN 201811468042 A CN201811468042 A CN 201811468042A CN 109742743 A CN109742743 A CN 109742743A
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Abstract
The present invention provides a kind of wide scope high voltage sampling clamping protective circuit; it include: the voltage detection signal circuit of at least two-stage series connection, every step voltage detection signal circuit includes signal input part, signal output end, multiple partial pressure clamper components and multiple voltage clamping portions；Multiple partial pressure clamper components are sequentially connected between the signal input part and signal output end on voltage detection signal circuits at different levels；Partial pressure clamper component includes resistance and voltage clamping connecting pin, and resistance and voltage clamping connecting pin are sequentially connected setting according to the direction of signal input part to signal output end；A voltage clamping portion is connected separately between corresponding voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit in the corresponding partial pressure clamper component of sequence.By the cooperation of multiple partial pressure clamper components and voltage clamping portion, multistage clamper is carried out to signal input voltage, in safe range by the pressure difference pincers between two-stage signal output end, it is ensured that the safety of voltage sense line unit and component when detection.
Description
Technical field
The invention mainly relates to battery modules detection overvoltage protection field more particularly to a kind of wide scope high voltage sampling pincers
Position protection circuit.
Background technique
Explosive development, battery modules, battery were presented in current energy-storage battery, automobile power cell etc. in recent years
The design of packet gradually develops to high voltage, high-power, high-energy density direction, and battery is also more and more general by series connection more multiple-unit
Time, it is also higher and higher to the testing requirements of every string cell voltage, especially to production detection device, because wiring error or product are different
It is also more and more often to introduce the case where high pressure causes equipment damage, reinforces the function that equipment inputs overvoltage protection, reduces equipment damage
It is bad to bring property loss and causing to stop line to delay work the risk of loss, become more and more important.
The high-precision detection circuit unit of current multi-string battery, is not isolated electrically between battery strings substantially, single group is defeated
It is universal relatively low (majority is within 100V) to enter voltage range, voltage detecting precision is relatively high, and majority reaches the grade of 1mV.With
Energy-storage battery and automobile power cell voltage become high, the voltage of entire battery pack has reached 500V or more at present, right
Connect in battery, voltage detecting circuit unit can only lean on through electrical isolation and realize, but due to every string battery lead wire compared with
More, artificial wiring is easy error, and the case where voltage detecting circuit unit wrong line also occurs frequently, when voltage exceeds 100V or more
When will result in expensive voltage detecting circuit unit damage or component (instrument and equipment) damage, or personnel is caused to shock by electricity work
Wound.Therefore, no matter the voltage detection unit of voltage detecting circuit unit or external equipment inside battery pack increases over-voltage and protects
Protection circuit is necessary.
In view of this, it is necessory to develop a kind of high voltage sampling clamper portion, to protect the voltage detecting inside battery pack
The voltage detection unit of circuit unit and external equipment.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of wide scope high voltage sampling clamper protection electricity
Road, to avoid in wrong line voltage beyond voltage detecting circuit unit damage or battery modules caused by safe range
Damage.
To solve the above problems, the present invention adopts the following technical scheme:
A kind of wide scope high voltage sampling clamping protective circuit, comprising:
At least voltage detection signal circuit of two-stage series connection, every step voltage detection signal circuit include signal input part, letter
Number output end, multiple partial pressure clamper components and multiple voltage clamping portions；
Multiple partial pressure clamper components are sequentially connected to signal input part on voltage detection signal circuits at different levels and signal is defeated
Between outlet；
Dividing clamper component includes resistance and voltage clamping connecting pin, and resistance and voltage clamping connecting pin are inputted according to signal
The direction of signal output end is held to be sequentially connected setting；
Corresponding voltage clamper connection on adjacent two-stage voltage detection signal circuit in the corresponding partial pressure clamper component of sequence
A voltage clamping portion is connected separately between end.
Further, multiple partial pressure clamper components include the first partial pressure clamper component and the second partial pressure clamper component；
First partial pressure clamper component includes first resistor and first voltage clamper connecting pin, and first resistor and first voltage clamp
Position connecting pin is sequentially connected setting according to the direction of signal input part to signal output end；
Second partial pressure clamper component includes second resistance and second voltage clamper connecting pin, and second resistance and second voltage clamp
Position connecting pin is sequentially connected setting according to the direction of signal input part to signal output end；
First voltage has been correspondingly connected between first voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit
Clamper portion；
Second voltage has been correspondingly connected between second voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit
Clamper portion.
Further, multiple partial pressure clamper components include the first partial pressure clamper component and the second partial pressure clamper component；
First partial pressure clamper component includes first resistor and first voltage clamper connecting pin, and first resistor and first voltage clamp
Position connecting pin is sequentially connected setting according to the direction of signal input part to signal output end；
Second partial pressure clamper component includes second resistance, second voltage clamper connecting pin and tertiary voltage clamper connecting pin,
Second resistance, second voltage clamper connecting pin and tertiary voltage clamper connecting pin according to signal input part to signal output end side
It is arranged to being sequentially connected；
First voltage has been correspondingly connected between first voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit
Clamper portion；
Second voltage has been correspondingly connected between second voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit
Clamper portion；
Tertiary voltage has been correspondingly connected between tertiary voltage clamper connecting pin on adjacent two-stage voltage detection signal circuit
Clamper portion；
Second voltage clamper portion is different with the clamper threshold value in tertiary voltage clamper portion.
Further, first voltage clamper portion includes two-way transient voltage suppressor, and two-way transient voltage inhibits two
First voltage clamper connection under the wherein pole connection normal condition of pole pipe on the low voltage order one detection signal circuit of voltage
End, another pole of two-way transient voltage suppressor connect on the high voltage order one detection signal circuit of voltage under normal condition
First voltage clamper connecting pin.
Further, first voltage clamper portion includes zener diode or unidirectional transient voltage suppressor, pressure stabilizing two
The low voltage order one of voltage detects signal circuit under the anode connection normal condition of pole pipe or unidirectional transient voltage suppressor
On first voltage clamper connecting pin, under the cathode connection normal condition of zener diode or unidirectional transient voltage suppressor
First voltage clamper connecting pin on the high voltage order one detection signal circuit of voltage.
Further, second voltage clamper portion includes zener diode or unidirectional transient voltage suppressor, pressure stabilizing two
The low voltage order one of voltage detects signal circuit under the anode connection normal condition of pole pipe or unidirectional transient voltage suppressor,
The high voltage order one of voltage detects signal circuit under the cathode connection normal condition of zener diode.
Further, tertiary voltage clamper portion is diode, voltage is low under the anode connection normal condition of diode one
Step voltage detects signal circuit, and the high voltage order one of voltage detects signal circuit under the cathode connection normal condition of diode.
Further, wide scope high voltage samples clamping protective circuit, further includes capacitor, and capacitor and second voltage clamp
Position portion is in parallel.
Further, resistance is the thermistor or conventional, electric-resistance of positive temperature coefficient.
Further, wide scope high voltage samples clamping protective circuit, further includes fuse, fuse is set to every level-one
On voltage detection signal circuit, fuse be connected to signal input part and near signal input part partial pressure clamper component it
Between.
The utility model has the advantages that wide scope high voltage provided by the invention samples clamping protective circuit, pass through multiple partial pressure clamper portions
Part is set gradually, and setting voltage clamping portion corresponding with voltage clamping connecting pin, when between two-stage signal input terminal
Pressure difference be more than given threshold when, can by it is multiple partial pressure clamper components and voltage clamping portion cooperations, to signal input voltage into
Row multistage clamper, in safe range by the pressure difference pincers between two-stage signal output end, it is ensured that voltage sense line when detection
The safety of unit and component (instrument and equipment).
It will test the electricity in circuit by the characteristic increased using fever conducting resistance value after thermistor (PTC) receiving high pressure
Ductility limit system is got off；By the voltage clamping characteristic of transient voltage suppressor (TVS pipe) and zener diode, by High Abnormal Pressure
Input voltage clamper and stabilization.
Detailed description of the invention
Fig. 1 is that the wide scope high voltage of one embodiment of the invention samples clamping protective circuit structural schematic diagram；
Fig. 2 is that the wide scope high voltage of another embodiment of the present invention samples clamping protective circuit structural schematic diagram；
Fig. 3 is that the wide scope high voltage of third embodiment of the invention samples clamping protective circuit structural schematic diagram；
Fig. 4 is that the wide scope high voltage of fourth embodiment of the invention samples clamping protective circuit structural schematic diagram.
Vi is input voltage measurement signal (signal input part) in figure, and Vi1, Vi2, Vi3, Vi4 connect step by step, input electricity
Pressure increases step by step；Vo is voltage sense signal (signal output end), and Vo1, Vo2, Vo3, Vo4 connect step by step, output electricity
Pressure increases step by step；Vi GND is input with reference to ground, and Vo GND is output with reference to ground.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing to the present invention
Specific embodiment be described in detail.
Specific embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiments of the present invention, instead of all the embodiments.Base
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts it is all its
His embodiment, shall fall within the protection scope of the present invention.
As shown in Figure 1, in one embodiment, a kind of wide scope high voltage sampling clamping protective circuit, comprising:
At least voltage detection signal circuit of two-stage series connection, every step voltage detection signal circuit include signal input part, letter
Number output end, multiple partial pressure clamper components and multiple voltage clamping portions；
Multiple partial pressure clamper components are sequentially connected to signal input part on voltage detection signal circuits at different levels and signal is defeated
Between outlet；
Dividing clamper component includes resistance and voltage clamping connecting pin, and resistance and voltage clamping connecting pin are inputted according to signal
The direction of signal output end is held to be sequentially connected setting；
Corresponding voltage clamper connection on adjacent two-stage voltage detection signal circuit in the corresponding partial pressure clamper component of sequence
A voltage clamping portion is connected separately between end.
Wide scope high voltage provided in this embodiment samples clamping protective circuit, successively by multiple partial pressure clamper components
Setting, and setting voltage clamping portion corresponding with voltage clamping connecting pin, when the pressure difference between two-stage signal input terminal is more than
When given threshold, multistage pincers can be carried out to signal input voltage by the cooperation of multiple partial pressure clamper components and voltage clamping portion
Position, in safe range by the pressure difference pincers between two-stage signal output end, it is ensured that voltage sense line unit and member when detection
The safety of device (instrument and equipment).
In the present embodiment, under normal condition, certain pressure difference is formed between signal input part Vi described in every adjacent two-stage,
Certain pressure difference is formed between signal output end Vo described in per adjacent two-stage, and multiple clamper portions are in off state.Inspection
When survey, the equipment that will be detected is connected between the adjacent two-stage signal output end vo, and the adjacent two-stage signal is defeated
Outlet Vo connection makes the voltage detection signal circuit of the adjacent two-stage series connection form closed circuit；
In the present embodiment, at least voltage detection signal circuit of two-stage series connection, can be that there are input voltage measurement letters
Two or more route of number pressure difference, every route includes signal input part Vi and signal output end Vo, every route
Signal input part Vi connect step by step.On every voltage detection signal circuit-line signal input part Vi and signal output end Vo it
Between partial pressure clamper component can be two, three or more；May include in each partial pressure clamper component a resistance and
One voltage clamping connecting pin also may include a resistance and two voltage clamping connecting pins.
In the present embodiment, as shown in figure 1 shown in Vi GND to Vi4, under normal condition, Vi GND to Vi4 voltage increases step by step.
Vi GND is input with reference to ground, and Vo GND is output with reference to ground.When mistake occurs in the signal input part Vi wiring of any one route
It mistakes, the voltage of signal input part Vi just will appear exception, including abnormal increase or negative voltage input.
Such as in this embodiment, partial pressure clamper component is set as two, includes a resistance in each partial pressure clamper component
With a voltage clamping connecting pin, when the electric voltage exception increase of the signal input part Vi of voltage order one detection signal circuit, and surpass
Out when given threshold, between the voltage detection signal circuit of the adjacent lower level-one of voltage near signal input part
Clamper portion will be connected, and e.g., the electric voltage exception of signal input part Vi1 increases, and when exceeding given threshold, at this point, signal inputs
The first voltage clamper portion 3 between Vi1 and Vi GND is held to be connected, electric current passes through resistance (the first electricity near signal input part
21) resistance, shunts flow direction near the clamper portion (first voltage clamper portion 3) of signal input part, and flow from first voltage clamper portion 3
Return Vi GND, in this way, voltage between Vi1 and Vi GND by 3, first voltage clamper portion, 4 clampers setting voltage value V4,
Current distributing is through second resistance 41 simultaneously, then shunts the second voltage clamper portion 5 that flows to, and voltage is again by second voltage clamper portion 5
8 clamper of part setting safe voltage V8, so that it is certain to be clamped at the voltage between signal output end Vo1 and V0GND
Value range.
When the signal input between two-stage series connection voltage detection signal circuit is negative voltage signal input, such as because of two signals
Connection is exchanged in input terminal Vi wiring, and specifically such as, the line for meeting signal input part Vi2 is linked on signal input part Vi1 originally,
Originally the line for meeting signal input part Vi1 is linked on signal input part Vi2 or signal input part Vi1 increases extremely, is more than
The signal voltage of signal input part Vi2 causes signal input part Vi1 to signal output end Vo1 and signal input part Vi2 to believing
Signal input between number 2 two-stage voltage detection signal circuit of output end vo is that negative voltage signal inputs.At this point, in addition to signal is defeated
Enter to hold Vi1 to signal output end Vo1 and signal input part Vi GND to signal output end Vo GND two-stage voltage detection signal electricity
Outer, signal input part Vi1 to signal output end Vo1 may be connected in first voltage clamper portion 3 and second voltage clamper portion 5 between road
And signal input part Vi2 to first voltage clamper portion 3 between signal output end Vo2 two-stage voltage detection signal circuit will also be reversed
Conducting, by the voltage clamping between signal output end Vo1 and signal output end Vo2 in a lower range, if through this two
First voltage clamper portion 3 between grade circuit is shunted with after voltage clamping, and the backward voltage in first voltage clamper portion 3 is also larger, then
Second voltage clamper portion 5 between the two-stage voltage detection signal circuit is defeated by signal output end Vo1 and signal also by reverse-conducting
Voltage between outlet Vo2 further limits, and guarantees between adjacent two-stage voltage detection signal circuit signal output end vo
Pressure difference guarantees the safety of detection route and voltage detection unit (or component, instrument and equipment) in the threshold value of setting.
Referring to Fig.1, in one embodiment, multiple partial pressure clamper components include the first partial pressure clamper component 2 and the second partial pressure
Clamper component 4；
First partial pressure clamper component 2 includes first resistor 21 and first voltage clamper connecting pin 22, first resistor 21 and the
One voltage clamping connecting pin 22 is sequentially connected setting according to the direction of signal input part to signal output end；
Second partial pressure clamper component 4 includes second resistance 41 and second voltage clamper connecting pin 42, second resistance 41 and the
Two voltage clamping connecting pins 42 are sequentially connected setting according to the direction of signal input part to signal output end；
The first electricity has been correspondingly connected between first voltage clamper connecting pin 22 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 3；
The second electricity has been correspondingly connected between second voltage clamper connecting pin 42 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 5.
Setting gradually for clamper component, and setting voltage clamping corresponding with voltage clamping connecting pin are divided by two
Portion can pass through two partial pressure clamper components and voltage clamping when the pressure difference between two-stage signal input terminal is more than given threshold
The cooperation in portion carries out two-stage clamper to signal input voltage, in safe range by the pressure difference pincers between two-stage signal output end,
Ensure the safety of the voltage sense line unit and component (instrument and equipment) when detecting.
Referring to Fig. 2, in one embodiment, multiple partial pressure clamper components include the first partial pressure clamper component 2 and the second partial pressure
Clamper component 4；
First partial pressure clamper component 2 includes first resistor 21 and first voltage clamper connecting pin 22, first resistor 21 and the
One voltage clamping connecting pin 22 is sequentially connected setting according to the direction of signal input part to signal output end；
Second partial pressure clamper component 4 includes that second resistance 41, second voltage clamper connecting pin 42 and tertiary voltage clamper connect
End 43 is connect, second resistance 41, second voltage clamper connecting pin 42 and tertiary voltage clamper connecting pin 43 are arrived according to signal input part
The direction of signal output end is sequentially connected setting；
The first electricity has been correspondingly connected between first voltage clamper connecting pin 22 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 3；
The second electricity has been correspondingly connected between second voltage clamper connecting pin 42 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 5；
Third electricity has been correspondingly connected between tertiary voltage clamper connecting pin 43 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 6；
Second voltage clamper portion 5 is different with the clamper threshold value in tertiary voltage clamper portion 6.
In this embodiment, partial pressure clamper component includes second resistance 41, second voltage clamper connecting pin 42 and third electricity
Pressing tongs position connecting pin 43, and between the second voltage clamper connecting pin 42 on two-stage neighboring voltage detection signal circuit and two-stage
Setting 5 He of second voltage clamper portion is respectively corresponded between tertiary voltage clamper connecting pin 43 on neighboring voltage detection signal circuit
The clamper threshold value in tertiary voltage clamper portion 6, second voltage clamper portion 5 and tertiary voltage clamper portion 6 is different.It, can by the setting
By the cooperation of same partial pressure clamper component and two voltage clamping portions, positive abnormal voltage or negative anomaly voltage clamping are existed
In different threshold values.
In one embodiment, two identical clamps can be selected, accesses in circuit, makees respectively in the opposite direction
For second voltage clamper portion 5 and tertiary voltage clamper portion 6, the clamper of positive abnormal voltage and negative anomaly voltage is realized.
In another embodiment, it using two different clamps, is accessed in circuit by identical direction, respectively
As second voltage clamper portion 5 and tertiary voltage clamper portion 6, clamper valve of this two different clamps to positive abnormal voltage
Value is different, also not identical to the clamper threshold values of negative anomaly voltage, with the two clamps respectively as second voltage clamper portion 5
It with tertiary voltage clamper portion 6, realizes in positive abnormal voltage, one of voltage clamping portion ON operation, carries out voltage clamp
Position；In negative anomaly voltage, another voltage clamping portion ON operation carries out voltage clamping.
In the present embodiment, the negative anomaly voltage refers to the voltage detection signal circuit of the low level-one of original voltage, signal input
End electric voltage exception increases above the signal input part of high voltage order one detection signal circuit originally.
Referring to Fig. 3, in another embodiment, multiple partial pressure clamper components include that the first partial pressure clamper component 2, second divides
Clamper component 4 and third divide clamper component 7；
First partial pressure clamper component 2 includes first resistor 21 and first voltage clamper connecting pin 22, first resistor 21 and the
One voltage clamping connecting pin 22 is sequentially connected setting according to the direction of signal input part to signal output end；
Second partial pressure clamper component 4 includes second resistance 41 and second voltage clamper connecting pin 42, second resistance 41 and the
Two voltage clamping connecting pins 42 are sequentially connected setting according to the direction of signal input part to signal output end；
It includes 3rd resistor 71 and the 4th voltage clamping connecting pin 72,3rd resistor 71 and that third, which divides clamper component 7,
Four voltage clamping connecting pins 72 are sequentially connected setting according to the direction of signal input part to signal output end；
The first electricity has been correspondingly connected between first voltage clamper connecting pin 22 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 3；
The second electricity has been correspondingly connected between second voltage clamper connecting pin 42 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 5；
The 4th electricity has been correspondingly connected between the 4th voltage clamping connecting pin 72 on adjacent two-stage voltage detection signal circuit
Pressing tongs position portion 8.
When (electric voltage exception of citing such as Vi1) increases the signal input part Vi of voltage order one detection signal circuit, and exceeds
When given threshold, at this point, the first voltage clamper portion 3 between signal input part Vi1 and Vi GND is connected, electric current passes through the first electricity
Resistance 21, flows to first voltage clamper portion 3, and flow back to Vi GND from first voltage clamper portion 3, in this way, Vi1 and Vi GND it
Between voltage by 3, first voltage clamper portion, 4 clampers in the voltage value V4 of setting, while current distributing is through second resistance 41, then
Shunting flows to second voltage clamper portion 5, voltage again by 5 clamper of second voltage clamper portion setting safe voltage V8, if through
After crossing two-stage clamper, the voltage in second voltage clamper portion 5 is also relatively high, and current distributing is through 3rd resistor 71, then shunts and flow to
Four voltage clamping portions 8, voltage again by 8, the 4th voltage clamping portion clamper setting safe voltage V12, to keep signal defeated
Voltage between outlet Vo1 and V0GND is clamped at certain value range.
In one embodiment, first voltage clamper portion 3 includes two-way transient voltage suppressor, and two-way transient electrical is constrained
First voltage clamper under the wherein pole connection normal condition of diode processed on the low voltage order one detection signal circuit of voltage
Connecting pin 22, another pole of two-way transient voltage suppressor connect the voltage order one that voltage is high under normal condition and detect signal
First voltage clamper connecting pin 22 on circuit.
By using two-way transient voltage suppressor as first voltage clamper portion 3, when multilevel voltage detects signal
When wherein one or more levels input voltage in circuit is much larger than normal voltage input value, or when multilevel voltage detection signal electricity
Road signal input part Vi has one or more levels abnormal reversed, and when negative voltage inputs, two-way transient voltage suppressor can be led
It is logical, dramatically the two-stage pressure difference generated extremely is limited.Transient voltage suppressor has biggish junction area, leads to
Stream ability is stronger, plays good inhibiting effect to the electric current uprushed extremely in route.
In another embodiment, first voltage clamper portion 3 includes zener diode or unidirectional transient voltage suppressor,
The low voltage order one of voltage detects letter under the anode connection normal condition of zener diode or unidirectional transient voltage suppressor
The cathode connection of first voltage clamper connecting pin 22 on number circuit, zener diode or unidirectional transient voltage suppressor is just
First voltage clamper connecting pin 22 under normal state on the high voltage order one detection signal circuit of voltage.
By using zener diode as first voltage clamper portion 3, when multilevel voltage detection signal circuit signal input
End Vi has one or more levels abnormal reversed, and when negative voltage inputs, zener diode or unidirectional transient voltage suppressor will be led
It is logical, realize the clamping action under negative voltage input state.By using zener diode or unidirectional transient voltage suppressor
As first voltage clamper portion 3, there is preferable effect for adjusting steady state voltage and low current clamp.
In one embodiment, second voltage clamper portion 5 includes zener diode or unidirectional transient voltage suppressor, surely
The voltage order one that voltage is low under the anode connection normal condition of diode or unidirectional transient voltage suppressor is pressed to detect signal
Circuit, the cathode of zener diode connect the voltage order one that voltage is high under normal condition and detect signal circuit.
By using zener diode or unidirectional transient voltage suppressor as second voltage clamper portion 5, work as multistage
Voltage detection signal input terminal Vi has one or more levels abnormal reversed, when negative voltage inputs, zener diode or unidirectional transient electrical
Constraining diode processed will be connected, and realize the clamping action under negative voltage input state.By using zener diode or unidirectional wink
Time variant voltage inhibits diode as second voltage clamper portion 5, has preferable effect for adjusting steady state voltage and low current clamp
Fruit.
In one embodiment, tertiary voltage clamper portion 6 is diode, and voltage is low under the anode connection normal condition of diode
Voltage order one detect signal circuit, diode cathode connection normal condition under voltage it is high voltage order one detection signal electricity
Road.
By using diode as tertiary voltage clamper portion 6, when the signal input part of voltage detection signal circuit is abnormal
Reversed, when negative voltage being caused to input, which realizes the pincers to the output end voltage of two-stage voltage detection signal circuit
Position.
Referring to Fig. 4, in one embodiment, it further includes capacitor 9, capacitor that wide scope high voltage, which samples clamping protective circuit,
9 is in parallel with second voltage clamper portion 5.
By the setting of capacitor 9, when voltage instantaneous exception, capacitor 9 carries out pair abnormal high pressure by charge and discharge
Punching cooperates with zener diode and realizes voltage regulation result.
In one embodiment, resistance is the thermistor or conventional, electric-resistance of positive temperature coefficient.
As in the present embodiment, first resistor 21 is thermistor.By using thermistor as first resistor 21, benefit
The characteristic that fever conducting resistance value increases after bearing high pressure with thermistor (PTC) will test the current limit in circuit and get off.
Referring to figs. 1 to Fig. 4, in one embodiment, it further includes fuse 1 that wide scope high voltage, which samples clamping protective circuit,
Fuse 1 is set on every voltage order one detection signal circuit, fuse 1 be connected to signal input part Vi and first resistor 21 it
Between.
To guarantee under voltage input abnormal conditions voltage sense line unit and voltage detection unit (or component, instrument
Device equipment) safety, fuse 1 is set, when electric current superthreshold is abnormal, is fused by fuse 1, protects voltage sense line list
The safety of member and voltage detection unit (or component, instrument and equipment).
Wide scope high voltage provided by the invention samples clamping protective circuit, passes through successively setting for multiple partial pressure clamper components
It sets, and setting voltage clamping portion corresponding with voltage clamping connecting pin, when the pressure difference between two-stage signal input terminal is more than to set
When determining threshold value, multistage clamper can be carried out to signal input voltage by the cooperation of multiple partial pressure clamper components and voltage clamping portion,
In safe range by the pressure difference pincers between two-stage signal output end, it is ensured that voltage sense line unit and component when detection
The safety of (instrument and equipment).
It will test the electricity in circuit by the characteristic increased using fever conducting resistance value after thermistor (PTC) receiving high pressure
Ductility limit system is got off；By the voltage clamping characteristic of transient voltage suppressor (TVS pipe) and zener diode, by High Abnormal Pressure
Input voltage clamper and stabilization.
The above is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all to utilize this hair
The transformation of equivalent structure made by bright specification and accompanying drawing content or equivalent material, it is relevant to be applied directly or indirectly in other
Technical field is included within the scope of the present invention.
Claims (10)
1. a kind of wide scope high voltage samples clamping protective circuit characterized by comprising
At least voltage detection signal circuit of two-stage series connection, every grade of voltage detection signal circuit include signal input part, letter
Number output end, multiple partial pressure clamper components and multiple voltage clamping portions；
The multiple partial pressure clamper component is sequentially connected to the signal input part on the voltage detection signal circuits at different levels
Between the signal output end；
The partial pressure clamper component includes resistance and voltage clamping connecting pin, and the resistance and voltage clamping connecting pin are according to described
The direction of signal input part to the signal output end is sequentially connected setting；
The correspondence voltage on voltage detection signal circuit described in adjacent two-stage in the corresponding partial pressure clamper component of sequence
The voltage clamping portion is connected separately between clamper connecting pin.
2. wide scope high voltage according to claim 1 samples clamping protective circuit, which is characterized in that the multiple partial pressure
Clamper component includes the first partial pressure clamper component and the second partial pressure clamper component；
The first partial pressure clamper component includes first resistor and first voltage clamper connecting pin, the first resistor and the first electricity
Pressing tongs position connecting pin is sequentially connected setting according to the direction of the signal input part to the signal output end；
The second partial pressure clamper component includes second resistance and second voltage clamper connecting pin, the second resistance and the second electricity
Pressing tongs position connecting pin is sequentially connected setting according to the direction of the signal input part to the signal output end；
It has been correspondingly connected between first voltage clamper connecting pin on voltage detection signal circuit described in adjacent two-stage described
First voltage clamper portion；
It has been correspondingly connected between second voltage clamper connecting pin on voltage detection signal circuit described in adjacent two-stage described
Second voltage clamper portion.
3. wide scope high voltage according to claim 1 samples clamping protective circuit, which is characterized in that the multiple partial pressure
Clamper component includes the first partial pressure clamper component and the second partial pressure clamper component；
The first partial pressure clamper component includes first resistor and first voltage clamper connecting pin, the first resistor and the first electricity
Pressing tongs position connecting pin is sequentially connected setting according to the direction of the signal input part to the signal output end；
The second partial pressure clamper component includes second resistance, second voltage clamper connecting pin and tertiary voltage clamper connecting pin,
The second resistance, second voltage clamper connecting pin and tertiary voltage clamper connecting pin are according to the signal input part to the letter
The direction of number output end is sequentially connected setting；
It has been correspondingly connected between first voltage clamper connecting pin on voltage detection signal circuit described in adjacent two-stage described
First voltage clamper portion；
It has been correspondingly connected between second voltage clamper connecting pin on voltage detection signal circuit described in adjacent two-stage described
Second voltage clamper portion；
It has been correspondingly connected between tertiary voltage clamper connecting pin on voltage detection signal circuit described in adjacent two-stage described
Tertiary voltage clamper portion；
Second voltage clamper portion is different with the clamper threshold value in tertiary voltage clamper portion.
4. wide scope high voltage according to claim 2 or 3 samples clamping protective circuit, which is characterized in that described first
Voltage clamping portion includes two-way transient voltage suppressor, the wherein pole connection of the two-way transient voltage suppressor
First voltage clamper connecting pin under normal condition on voltage detection signal circuit described in the low level-one of voltage, it is described two-way
Under another pole connection normal condition of transient voltage suppressor on voltage detection signal circuit described in the high level-one of voltage
First voltage clamper connecting pin.
5. wide scope high voltage according to claim 2 or 3 samples clamping protective circuit, which is characterized in that described first
Voltage clamping portion includes zener diode or unidirectional transient voltage suppressor, the zener diode or unidirectional transient voltage
Inhibit first electricity on voltage detection signal circuit described in the level-one that voltage is low under the anode connection normal condition of diode
Voltage is high under the cathode connection normal condition of pressing tongs position connecting pin, the zener diode or unidirectional transient voltage suppressor
Level-one described in first voltage clamper connecting pin on voltage detection signal circuit.
6. wide scope high voltage according to claim 2 or 3 samples clamping protective circuit, which is characterized in that described second
Voltage clamping portion includes zener diode or unidirectional transient voltage suppressor, the zener diode or unidirectional transient voltage
Inhibit voltage detection signal circuit described in the level-one that voltage is low under the anode connection normal condition of diode, the zener diode
Cathode connection normal condition under voltage detection signal circuit described in the high level-one of voltage.
7. wide scope high voltage according to claim 3 samples clamping protective circuit, which is characterized in that the tertiary voltage
Clamper portion is diode, voltage detection signal electricity described in the low level-one of voltage under the anode connection normal condition of the diode
The cathode on road, the diode connects voltage detection signal circuit described in the level-one that voltage is high under normal condition.
8. wide scope high voltage according to claim 2 or 3 samples clamping protective circuit, which is characterized in that further include electricity
Container, the capacitor are in parallel with second voltage clamper portion.
9. wide scope high voltage according to claim 1 samples clamping protective circuit, which is characterized in that the resistance is positive
The thermistor or conventional, electric-resistance of temperature coefficient.
10. wide scope high voltage according to claim 1 samples clamping protective circuit, which is characterized in that further include fusing
Device, the fuse are set on voltage detection signal circuit described in every level-one, and the fuse is connected to the signal input
It holds and between the partial pressure clamper component of the signal input part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468042.2A CN109742743A (en) | 2018-12-03 | 2018-12-03 | Wide scope high voltage samples clamping protective circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468042.2A CN109742743A (en) | 2018-12-03 | 2018-12-03 | Wide scope high voltage samples clamping protective circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109742743A true CN109742743A (en) | 2019-05-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811468042.2A Pending CN109742743A (en) | 2018-12-03 | 2018-12-03 | Wide scope high voltage samples clamping protective circuit |
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| Country | Link |
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| CN (1) | CN109742743A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986148A (en) * | 2014-06-03 | 2014-08-13 | 上海电机学院 | Lightning protection circuit of RS485 communication line |
| CN105098933A (en) * | 2015-09-28 | 2015-11-25 | 重庆长安汽车股份有限公司 | Battery monomer acquisition detection device |
| JP2018093679A (en) * | 2016-12-07 | 2018-06-14 | 株式会社オートネットワーク技術研究所 | Protection circuit of battery monitoring device and battery monitoring device |
-
2018
- 2018-12-03 CN CN201811468042.2A patent/CN109742743A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103986148A (en) * | 2014-06-03 | 2014-08-13 | 上海电机学院 | Lightning protection circuit of RS485 communication line |
| CN105098933A (en) * | 2015-09-28 | 2015-11-25 | 重庆长安汽车股份有限公司 | Battery monomer acquisition detection device |
| JP2018093679A (en) * | 2016-12-07 | 2018-06-14 | 株式会社オートネットワーク技術研究所 | Protection circuit of battery monitoring device and battery monitoring device |
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Application publication date: 20190510 |
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