CN206644765U - 360 degree of panorama low-voltage protection circuits of automobile - Google Patents
360 degree of panorama low-voltage protection circuits of automobile Download PDFInfo
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- CN206644765U CN206644765U CN201720401835.7U CN201720401835U CN206644765U CN 206644765 U CN206644765 U CN 206644765U CN 201720401835 U CN201720401835 U CN 201720401835U CN 206644765 U CN206644765 U CN 206644765U
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Abstract
The utility model discloses a kind of 360 degree of panorama low-voltage protection circuits of automobile, including：On-off circuit, it is connected between cell voltage and system input voltage；Comparison circuit, its output end are connected with on-off circuit；Sample circuit, its output end are connected to the first input end of comparison circuit, and sampled voltage signal is exported after being sampled to battery voltage signal；Reference voltage generating circuit, for producing reference voltage signal, its output end is connected to the second input of comparison circuit；Comparison circuit is by sampled voltage signal compared with reference voltage signal, and when cell voltage is less than the threshold voltage set, controlling switch circuit disconnects the connection of cell voltage and system input voltage, cell voltage is stopped output battery voltage signal.The utility model can the electricity consumption of preventing car battery excessively cause to feed, extend battery, while ensure that driver conveniently sparking can start automobile at any time, do not influence the normal use of vehicle.
Description
Technical field
Automobile battery voltage protection technique field is the utility model is related to, more particularly to a kind of 360 degree of panorama low pressure of automobile
Protection circuit.
Background technology
360 degree of panoramas of automobile get a bird's eye view image system, or other parkings will use the electronic product of automobile batteries, it is necessary to make
With the original battery of automobile as power supply；360 degree of panoramas of automobile get a bird's eye view image system, and its another function is parking monitoring,
When vehicle parking, the system need of work consumes the energy of the original battery of automobile, and former car cell voltage standard is 12V
Left and right, long-term use inherently reduce the battery energy of automobile, and voltage reduces, when voltage is less than 10.5V for a long time,
Battery can faster shorten itself service life；When battery tension is less than 9V, driver is difficult that automobile is struck sparks to start.
Utility model content
The purpose of this utility model is overcome the deficiencies in the prior art, there is provided one kind is applied to 360 degree of panorama birds of automobile
Look down from a height image system, can the electricity consumption of preventing car battery excessively cause 360 degree of panorama low-voltage protection circuits of automobile of feed.
The technical solution of the utility model is as follows：A kind of 360 degree of panorama low-voltage protection circuits of automobile, including：
On-off circuit, it is connected between cell voltage and system input voltage, the on-off circuit controls the battery electricity
Pressure output battery voltage signal；
Comparison circuit, its output end are connected with the on-off circuit；
Sample circuit, its output end are connected to the first input end of the comparison circuit, and the battery voltage signal is entered
Sampled voltage signal is exported after row sampling；
Reference voltage generating circuit, for producing reference voltage signal, its output end is connected to the of the comparison circuit
Two inputs；
The comparison circuit by the sampled voltage signal compared with the reference voltage signal, when the battery electricity
Force down the company for when threshold voltage of setting, controlling the on-off circuit to disconnect the cell voltage and the system input voltage
Connect, the cell voltage is stopped output battery voltage signal.
Wherein, the scope of the threshold voltage is 11~12.5V.
Wherein, the on-off circuit includes metal-oxide-semiconductor, the drain connection cell voltage of the metal-oxide-semiconductor, the source of the metal-oxide-semiconductor
Cascade welding system input voltage, the grid level of the metal-oxide-semiconductor are connected to the comparison circuit.
Wherein, the model 2N7002E of the metal-oxide-semiconductor.
Wherein, the comparison circuit includes comparator, the first divider resistance and the first filter capacitor, the comparator
Level output end is connected by current-limiting resistance with the grid level of the metal-oxide-semiconductor, is adopted described in the normal phase input end access of the comparator
Sample circuit, the first sampling resistor, the current-limiting resistance that the output end of the sample circuit is concatenated successively are connected to the grid of the metal-oxide-semiconductor
Level, the negative-phase input of the comparator access the reference voltage generating circuit, and the power end of the comparator passes through described
First filter capacitor is grounded, and one end of first divider resistance is connected to the power end of the comparator, first partial pressure
The other end of resistance is connected with the level output end of the comparator, the negative pole ground connection of the comparator.
Wherein, the comparator uses chip LM393.
Wherein, the sample circuit includes sampled voltage, is sequentially connected in series in the sampled voltage and the comparator just
The second sampling resistor and the 3rd sampling resistor between phase input, and be sequentially connected in series in the defeated of the sample circuit
The first sampling capacitance, the second sampling capacitance, the 3rd sampling capacitance gone out between end and ground terminal, the sampled voltage are adopted by the 4th
Sample resistance eutral grounding.
Wherein, the reference voltage generating circuit includes reference voltage source, is connected on the reference voltage source and the ratio
Compared with the second divider resistance between the negative-phase input of device, the output end of the reference voltage generating circuit passes through the second filtered electrical
Hold ground connection, the 3rd divider resistance and the 4th have been sequentially connected in series between the output end and ground terminal of the reference voltage generating circuit
Divider resistance.
Wherein, the reference voltage source is 5V.
Relative to prior art, the beneficial effects of the utility model are：The utility model is mainly used in 360 degree of automobile
Panorama gets a bird's eye view image system, and 360 degree of panoramas of automobile can be allowed to get a bird's eye view when image system is maintained at 11V and be stopped, making will not
Consume the energy of automobile storage battery, it is ensured that the extension of battery, while ensure that driver can facilitate at any time
Sparking starts automobile, does not influence the normal use of vehicle.
Brief description of the drawings
Fig. 1 is the circuit diagram for 360 degree of panorama low-voltage protection circuits of automobile that the utility model embodiment provides.
Embodiment
In order that the purpose of this utility model, technical scheme and advantage are more clearly understood, below in conjunction with accompanying drawing and implementation
Example, the utility model is further elaborated.It should be appreciated that specific embodiment described herein is only explaining
The utility model, it is not used to limit the utility model.
360 degree of panorama low-voltage protection circuits of automobile that the utility model embodiment provides, applied to 360 degree of panorama birds of automobile
Look down from a height image system, or other parkings will use the electronic product of automobile batteries, and power supply is being done using the original battery of automobile
When, it can excessively cause to feed with the electricity consumption of preventing car battery, the physical circuit of 360 degree of panorama low-voltage protection circuits of automobile
As shown in figure 1, for convenience of description, the part related to the utility model embodiment is illustrate only, details are as follows.
360 degree of panorama low-voltage protection circuits of automobile include：On-off circuit, comparison circuit, sample circuit and reference voltage
Generation circuit；Wherein, on-off circuit is connected between cell voltage ACCIN and system input voltage ACC, on-off circuit control electricity
Cell voltage ACCIN exports battery voltage signal；The output end of comparison circuit is connected with on-off circuit；The output end of sample circuit connects
The first input end of comparison circuit is connected to, sampled voltage signal is exported after being sampled to battery voltage signal；Reference voltage produces
Raw circuit is used to produce reference voltage signal, and its output end is connected to the second input of comparison circuit.
On-off circuit includes metal-oxide-semiconductor D15, and metal-oxide-semiconductor D15 model 2N7002E, metal-oxide-semiconductor D15 include 3 pins, point
Not Wei drain D, source class S, grid level G, metal-oxide-semiconductor D15 drain D connections cell voltage ACCIN, metal-oxide-semiconductor D15 source class S connections system
Unite input voltage ACC, and metal-oxide-semiconductor D15 grid level G is connected to comparison circuit.
Comparison circuit includes comparator U15A, the first divider resistance R102 and the first filter capacitor C107, the comparison
Device uses chip LM393, and it includes 5 pins, respectively level output end, normal phase input end+, negative-phase input-, power end
VDD and negative pole VSS, comparator U15A level output end are connected by current-limiting resistance R99 with metal-oxide-semiconductor D15 grid level G, than
Normal phase input end+access sample circuit compared with device U15A, the first sampling resistor that the output end of sample circuit is concatenated successively
Negative-phase input-access reference voltage that R100 and current-limiting resistance R99 is connected to metal-oxide-semiconductor D15 grid level G, comparator U15A produces
Circuit, comparator U15A power end VDD are grounded by the first filter capacitor C107, the first divider resistance R102 one end connection
To comparator U15A power end VDD, the first divider resistance R102 other end is connected with comparator U15A level output end,
Comparator U15A negative pole VSS ground connection.
Sample circuit includes sampled voltage+9V_36V, is sequentially connected in series in sampled voltage+9V_36V and comparator U15A just
Phase input+between the second sampling resistor R101 and the 3rd sampling resistor R108, and be sequentially connected in series in sample circuit
Output end and ground terminal between the first sampling capacitance C103, the second sampling capacitance C104, the 3rd sampling capacitance C105, sampling electricity
Pressure+9V_36V is grounded by the 4th sampling resistor R103.
Reference voltage generating circuit includes reference voltage source 5V, is connected on reference voltage source 5V and comparator U15A negative
Input-between the second divider resistance R109, the output end of reference voltage generating circuit connect by the second filter capacitor C108
Ground, the 3rd divider resistance R110 and the 4th partial pressure are sequentially connected in series between the output end and ground terminal of reference voltage generating circuit
Resistance R111.
Circuit theory of the present utility model is as follows：Sample circuit exports sampled voltage after being sampled to battery voltage signal
Signal, reference voltage generating circuit produce reference voltage signal, are believed sampled voltage signal and reference voltage by comparison circuit
Number it is compared, when cell voltage is less than the threshold voltage set, controlling switch circuit disconnects cell voltage ACCIN and system
Input voltage ACC connection, cell voltage ACCIN is set to stop output battery voltage signal, wherein, the scope of the threshold voltage
For 11~12.5V, by changing the 3rd divider resistance R110 and the 4th divider resistance R111 resistance, benchmark electricity can be directly affected
Pressure value, so as to change comparator U15A normal phase input ends+control source height, determine comparator U15A level output ends it is defeated
Go out level, make its rear class metal-oxide-semiconductor D15 on or off, metal-oxide-semiconductor D15 conducting and cut-off also just trigger power supply circuit
Chip enables the startup and closing of pin, so as to have the function that to make whole equipment system starts or closing, plays protection
The constant purpose of former car cell voltage.
Preferred embodiment of the present utility model is these are only, is not limited to the utility model, it is all in this practicality
All any modification, equivalent and improvement made within new spirit and principle etc., should be included in guarantor of the present utility model
Within the scope of shield.
Claims (9)
- A kind of 1. 360 degree of panorama low-voltage protection circuits of automobile, it is characterised in that including：On-off circuit, it is connected between cell voltage and system input voltage, the on-off circuit controls the cell voltage defeated Go out battery voltage signal；Comparison circuit, its output end are connected with the on-off circuit；Sample circuit, its output end are connected to the first input end of the comparison circuit, and the battery voltage signal is adopted Sampled voltage signal is exported after sample；Reference voltage generating circuit, for producing reference voltage signal, it is second defeated to be connected to the comparison circuit for its output end Enter end；The comparison circuit by the sampled voltage signal compared with the reference voltage signal, when the cell voltage is low When the threshold voltage of setting, the on-off circuit is controlled to disconnect the connection of the cell voltage and the system input voltage, The cell voltage is set to stop output battery voltage signal.
- 2. 360 degree of panorama low-voltage protection circuits of automobile according to claim 1, it is characterised in that the threshold voltage Scope is 11~12.5V.
- 3. 360 degree of panorama low-voltage protection circuits of automobile according to claim 1, it is characterised in that the on-off circuit bag Include metal-oxide-semiconductor, the drain connection cell voltage of the metal-oxide-semiconductor, the source class connection system input voltage of the metal-oxide-semiconductor, the metal-oxide-semiconductor Grid level be connected to the comparison circuit.
- 4. 360 degree of panorama low-voltage protection circuits of automobile according to claim 3, it is characterised in that the model of the metal-oxide-semiconductor For 2N7002E.
- 5. 360 degree of panorama low-voltage protection circuits of automobile according to claim 3, it is characterised in that the comparison circuit bag Comparator, the first divider resistance and the first filter capacitor are included, the level output end of the comparator passes through current-limiting resistance and institute The grid level connection of metal-oxide-semiconductor is stated, the normal phase input end of the comparator accesses the sample circuit, the output end of the sample circuit The first sampling resistor, the current-limiting resistance being concatenated successively are connected to the grid level of the metal-oxide-semiconductor, and the negative-phase input of the comparator connects Enter the reference voltage generating circuit, the power end of the comparator is grounded by first filter capacitor, described first point One end of piezoresistance is connected to the power end of the comparator, the other end of first divider resistance and the electricity of the comparator Flat output end connection, the negative pole ground connection of the comparator.
- 6. 360 degree of panorama low-voltage protection circuits of automobile according to claim 5, it is characterised in that the comparator uses Chip LM393.
- 7. 360 degree of panorama low-voltage protection circuits of automobile according to claim 5, it is characterised in that the sample circuit bag The second sampling resistor for include sampled voltage, being sequentially connected in series between the normal phase input end of the sampled voltage and the comparator and 3rd sampling resistor, and be sequentially connected in series between the output end and ground terminal of the sample circuit the first sampling capacitance, Second sampling capacitance, the 3rd sampling capacitance, the sampled voltage are grounded by the 4th sampling resistor.
- 8. 360 degree of panorama low-voltage protection circuits of automobile according to claim 5, it is characterised in that the reference voltage production Raw circuit includes reference voltage source, second point be connected between the negative-phase input of the reference voltage source and the comparator Piezoresistance, the output end of the reference voltage generating circuit are grounded by the second filter capacitor, the reference voltage generating circuit Output end and ground terminal between be sequentially connected in series the 3rd divider resistance and the 4th divider resistance.
- 9. 360 degree of panorama low-voltage protection circuits of automobile according to claim 8, it is characterised in that the reference voltage source For 5V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720401835.7U CN206644765U (en) | 2017-04-17 | 2017-04-17 | 360 degree of panorama low-voltage protection circuits of automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720401835.7U CN206644765U (en) | 2017-04-17 | 2017-04-17 | 360 degree of panorama low-voltage protection circuits of automobile |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206644765U true CN206644765U (en) | 2017-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720401835.7U Expired - Fee Related CN206644765U (en) | 2017-04-17 | 2017-04-17 | 360 degree of panorama low-voltage protection circuits of automobile |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421130A (en) * | 2019-08-21 | 2021-02-26 | 上海度普新能源科技有限公司 | Battery management system and voltage sampling control circuit and electric automobile thereof |
-
2017
- 2017-04-17 CN CN201720401835.7U patent/CN206644765U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112421130A (en) * | 2019-08-21 | 2021-02-26 | 上海度普新能源科技有限公司 | Battery management system and voltage sampling control circuit and electric automobile thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171117 Termination date: 20210417 |
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| CF01 | Termination of patent right due to non-payment of annual fee |