CN207586396U - A kind of battery voltage detection circuit - Google Patents
A kind of battery voltage detection circuit Download PDFInfo
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- CN207586396U CN207586396U CN201721532600.8U CN201721532600U CN207586396U CN 207586396 U CN207586396 U CN 207586396U CN 201721532600 U CN201721532600 U CN 201721532600U CN 207586396 U CN207586396 U CN 207586396U
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Abstract
The utility model is related to a kind of battery voltage detection circuits, including sequentially connected voltage sample module, isolation amplifier module, first amplifier module, first filter module and processor, the voltage sample module is connected with battery to be measured, further include sequentially connected second amplifier module and the second filter module, the first amplifier module is connected with the second amplifier module, second filter module is connected with the processor, the battery voltage detection range of the battery voltage detection circuit is wide, it is simple in structure, battery of electric vehicle voltage is detected before can realizing DC charging motor charging, it also can detect voltage during battery reversal connection simultaneously.
Description
Technical field
The utility model is related to electronic field, more particularly to a kind of battery voltage detection circuit.
Background technology
The detection method of current cell voltage, detection battery voltage range is relatively narrow, reverse battery voltage can not be detected, if electric
During the reversal connection of pond, if charger plug in, just will appear surge current, cause battery pack damage and personal safety it is hidden
Suffer from, the circuit of existing battery voltage detection and battery reversal connection detection separation is more complicated, increases cost and reduces reliable
Property.
Utility model content
Technical problem to be solved in the utility model is：Before DC charging motor charging, it is wide, electric to provide a kind of detection range
Road is simple and when can detect battery reversal connection voltage battery voltage detection circuit.
In order to solve the above-mentioned technical problem, the technical solution adopted in the utility model is：A kind of battery voltage detection circuit,
Including sequentially connected voltage sample module, isolation amplifier module, the first amplifier module, the first filter module and processor, institute
It states voltage sample module with battery to be measured to be connected, further includes sequentially connected second amplifier module and the second filter module, institute
It states the first amplifier module with the second amplifier module to be connected, second filter module is connected with the processor；
The first amplifier module includes the 8th resistance, the 9th resistance, the tenth resistance, the 14th resistance, the first diode
With the first amplifier chip, the first pin of the first amplifier chip passes through the tenth resistance and the 5th pin phase of the first amplifier chip
Even, the 7th pin of the first amplifier chip is connected by the first diode with the first filter module, the third of the first amplifier chip
Pin is connected by the 8th resistance with isolation amplifier module, and the second pin of the first amplifier chip is transported by the 9th resistance with being isolated
Amplification module is connected, and the 6th pin of the first amplifier chip is connected to the ground by the 14th resistance；
The second amplifier module includes the 11st resistance, the 17th resistance, the second diode and the second amplifier chip, institute
The third pin for stating the second amplifier chip is connected with the first pin of the first amplifier chip, the second pin of the second amplifier chip with
First pin of the second amplifier chip is connected, and the first pin of the second amplifier chip passes through the 11st resistance and the second amplifier chip
The 6th pin be connected, the 7th pin of the second amplifier chip is connected by the second diode with the second filter module, second fortune
The 5th pin for putting chip is connected to the ground by the 17th resistance.
Further, the voltage sample module includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th
Resistance, the 6th resistance and the 7th resistance, the first resistor are connected by second resistance with 3rd resistor, and the 4th resistance leads to
It crosses the 5th resistance with the 6th resistance to be connected, the 3rd resistor is connected by the 7th resistance with the 5th resistance.
Further, the isolation amplifier module includes isolation amplifier chip, the 3rd resistor and isolation amplifier chip
Second pin be connected, the 6th resistance is connected with the third pin of isolation amplifier chip, the of the isolation amplifier chip
Seven pins are connected by the 8th resistance with the third pin of the first amplifier chip, and the 6th pin of the isolation amplifier chip passes through
9th resistance is connected with the second pin of the first amplifier chip.
Further, third diode, the 4th diode, the 5th diode and the 6th diode, the third are further included
The anode of diode, the cathode of the 4th diode, the anode of the 5th diode and the 6th diode cathode respectively with processor
It is connected, the cathode of the third diode and the cathode of the 5th diode are connected respectively with the first power supply, the 4th diode
Anode and the 6th diode plus earth.
Further, the first amplifier module further includes first comparator, the first capacitance, the second capacitance, the 12nd electricity
Resistance and the 13rd resistance, first capacitance and the 12nd resistor coupled in parallel, one end of the 12nd resistance are grounded, the 12nd resistance
The other end is connected with the electrode input end of the first comparative degree, second capacitance and the 13rd resistor coupled in parallel, second capacitance
One end be connected with the negative input of first comparator, the other end of second capacitance and the output terminal phase of first comparator
Even.
Further, the first amplifier module further includes the second comparator, third capacitance, the 14th resistance and the 15th
Resistance, the output terminal of a termination first comparator of the tenth resistance, the second comparator of another termination of the tenth resistance
Electrode input end, the 14th resistance one termination the second comparator negative input, the 14th resistance it is another
One end is grounded, the third capacitance and the 15th resistor coupled in parallel, and the cathode of second comparator of termination of the third capacitance is defeated
Enter end, the cathode of the first diode of another termination of the third capacitance.
Further, the second amplifier module further includes third comparator, the electrode input end of the third comparator
It is connected with the output terminal of first comparator, the negative input of the third comparator is connected with the output terminal of third comparator.
Further, the second amplifier module further includes the 4th comparator, the 16th resistance, the 17th resistance and the 4th
Capacitance, the output terminal of the third comparator are connected by the 11st resistance with the negative input of the 4th comparator, the 4th ratio
Electrode input end compared with device is connected with one end of the 17th resistance, the other end of the 17th resistance ground connection, the 16th resistance and the
Four capacitances are in parallel, and one end of the 4th capacitance is connected with the negative input of the 4th comparator, the other end and second of the 4th capacitance
The cathode of diode is connected.
Further, first filter module include the 18th resistance and the 5th capacitance, the one of the 18th resistance
End is connected with one end of the 5th capacitance, and one end of the 5th capacitance is connected with processor, another termination of the 5th capacitance
Ground, the other end of the 18th resistance are connected with the cathode of the first diode.
Further, second filter module include the 19th resistance and the 6th capacitance, the one of the 19th resistance
End is connected with one end of the 6th capacitance, and one end of the 6th capacitance is connected with processor, another termination of the 6th capacitance
Ground, the other end of the 19th resistance are connected with the cathode of the second diode.
The beneficial effects of the utility model are：By first resistor, second resistance, the 4th resistance, the 5th resistance to electricity
Pond generating positive and negative voltage is divided, battery forward direction input voltage up to 1000V, negative sense input voltage can big -1000V, the 7th resistance
Carry out battery voltage sampling, sampled voltage input isolation amplifier module, if cell voltage input is positive voltage, into the first amplifier
Module can obtain battery forward voltage, if cell voltage input is negative voltage, the difference amplifier amplification of the first amplifier module output
Battery voltage signal afterwards, by the second amplifier module, after carrying out the amplification of reverse phase ratio amplifier, through the second filter module export to
Processor is converted, and obtains positive cell voltage, and the utility model, which can be realized, detects cell voltage wide scope, can also examine simultaneously
Survey voltage during battery reversal connection.
Description of the drawings
Fig. 1 is the schematic diagram according to a kind of embodiment of battery voltage detection circuit of the utility model；
Fig. 2 is the circuit diagram according to a kind of embodiment of battery voltage detection circuit of the utility model；
Label declaration：
1st, battery；2nd, voltage sample module；3rd, isolation amplifier module；4th, the first amplifier module；
5th, the first filter module；6 processors；7th, the second amplifier module；8th, the second filter module.
Specific embodiment
For technology contents, the objects and the effects of the utility model are described in detail, below in conjunction with embodiment and match
Attached drawing is closed to be explained.
The design of the utility model most critical is：If battery reversal connection, the difference battery electricity of the first amplifier module output
Pressing signal, after carrying out the amplification of reverse phase ratio amplifier, filtered module is exported to be converted to processor, is obtained by the second amplifier module
Positive cell voltage.
Please refer to Fig. 1 and Fig. 2, a kind of battery voltage detection circuit, including sequentially connected voltage sample module 2, every
From amplifier module 3, the first amplifier module 4, the first filter module 5 and processor 6, the voltage sample module 2 and electricity to be measured
Pond 1 is connected, and further includes sequentially connected second amplifier module 7 and the second filter module 8, the first amplifier module 4 and second
Amplifier module 7 is connected, and second filter module 8 is connected with the processor 6；
The first amplifier module 4 includes the 8th resistance, the 9th resistance, the tenth resistance, the 14th resistance, the first diode
With the first amplifier chip, in embodiment, the first amplifier chip model OPA2348, the first pin of the first amplifier chip passes through
Tenth resistance is connected with the 5th pin of the first amplifier chip, and the 7th pin of the first amplifier chip passes through the first diode and
One filter module is connected, and the third pin of the first amplifier chip is connected by the 8th resistance with isolation amplifier module 3, the first amplifier
The second pin of chip is connected by the 9th resistance with isolation amplifier module 3, and the 6th pin of the first amplifier chip passes through the tenth
Four resistance are connected to the ground；
The second amplifier module 7 includes the 11st resistance, the 17th resistance, the second diode and the second amplifier chip,
In embodiment, the second amplifier chip model OPA2348, the third pin of second amplifier chip and the first amplifier chip
First pin is connected, and the second pin of the second amplifier chip is connected with the first pin of the second amplifier chip, the second amplifier chip
The first pin be connected by the 11st resistance with the 6th pin of the second amplifier chip, the 7th pin of the second amplifier chip leads to
It crosses the second diode with the second filter module 8 to be connected, the 5th pin of the second amplifier chip is connected to the ground by the 17th resistance.
Voltage sample module acquires battery voltage signal, the battery voltage signal of acquisition is carried out by isolation amplifier module every
From amplification, if battery just connects, amplified battery voltage signal is isolated by the first amplifier module, first pass through difference amplifier into
It after row amplification, after carrying out in-phase proportion amplifier amplification, exports through the first filter module and is converted to processor, obtain positive battery electricity
Pressure；If battery reversal connection, the battery voltage signal via the amplification of difference amplifier of the first amplifier module output passes through the second amplifier
Module after carrying out the amplification of reverse phase ratio amplifier, exports through the second filter module and is converted to processor, obtain positive cell voltage.
As can be seen from the above description, the beneficial effects of the utility model are：Pass through first resistor, second resistance, the 4th electricity
Resistance, the 5th resistance divide battery generating positive and negative voltage, battery forward direction input voltage up to 1000V, negative sense input voltage can it is big-
1000V, the 7th resistance carry out battery voltage sampling, sampled voltage input isolation amplifier module, if cell voltage input is positive electricity
Pressure, battery forward voltage can be obtained into the first amplifier module, if cell voltage input is negative voltage, the output of the first amplifier module
The amplified battery voltage signal of difference amplifier, by the second amplifier module, after carrying out the amplification of reverse phase ratio amplifier, through second
Filter module is exported to be converted to processor, obtains positive cell voltage, the utility model can be realized to cell voltage wide scope
Detection also can detect voltage during battery reversal connection simultaneously.
Further, the voltage sample module 2 includes first resistor, second resistance, 3rd resistor, the 4th resistance, the
Five resistance, the 6th resistance and the 7th resistance, the first resistor are connected by second resistance with 3rd resistor, the 4th resistance
It is connected by the 5th resistance with the 6th resistance, the 3rd resistor is connected by the 7th resistance with the 5th resistance.
Seen from the above description, current limliting partial pressure is carried out by first resistor, second resistance, the 4th resistance and the 5th resistance,
7th resistance carries out voltage sample, the battery voltage signal that can be sampled.
Further, the isolation amplifier module 3 includes isolation amplifier chip, and in embodiment, isolation amplifier chip is selected
AMC1301, the 3rd resistor are connected with the second pin of isolation amplifier chip, the 6th resistance and isolation amplifier chip
Third pin is connected, and the 7th pin of the isolation amplifier chip passes through the 8th resistance and the third pin phase of the first amplifier chip
Even, the 6th pin of the isolation amplifier chip is connected by the 9th resistance with the second pin of the first amplifier chip.
Seen from the above description, isolation amplification is carried out to the battery voltage signal of sampling by isolation amplifier module.
Further, third diode, the 4th diode, the 5th diode and the 6th diode, the third are further included
The anode of diode, the cathode of the 4th diode, the anode of the 5th diode and the 6th diode cathode respectively with processor
It is connected, the cathode of the third diode and the cathode of the 5th diode are connected respectively with the first power supply, in embodiment, the first electricity
3.3V is selected in source, and third diode, the 4th diode, the 5th diode and the 6th diode select SD103AWS, and the described 4th
The plus earth of the anode of diode and the 6th diode.
Seen from the above description, third diode, the 4th diode, the 5th diode and the 6th diode can prevent
One amplifier module and the output of the second amplifier module common-mode signal is excessive and break treat with device.
Further, the first amplifier module 4 further includes first comparator, the first capacitance, the second capacitance, the 12nd electricity
Resistance and the 13rd resistance, first capacitance and the 12nd resistor coupled in parallel, one end of the 12nd resistance are grounded, the 12nd resistance
The other end is connected with the electrode input end of the first comparative degree, second capacitance and the 13rd resistor coupled in parallel, second capacitance
One end be connected with the negative input of first comparator, the other end of second capacitance and the output terminal phase of first comparator
Even.
Seen from the above description, the first comparator, the first capacitance, the second capacitance, the 8th resistance, the 9th resistance,
12 resistance and the 13rd resistance composition difference amplifier, are amplified the battery voltage signal after Amplification and insulation.
Further, the first amplifier module 4 further includes the second comparator, third capacitance, the 14th resistance and the tenth
Five resistance, the output terminal of a termination first comparator of the tenth resistance, another termination second of the tenth resistance compare
The electrode input end of device, the negative input of second comparator of termination of the 14th resistance, the 14th resistance
The other end is grounded, the third capacitance and the 15th resistor coupled in parallel, the cathode of second comparator of termination of the third capacitance
Input terminal, the cathode of the first diode of another termination of the third capacitance.
Seen from the above description, second comparator, third capacitance, the tenth resistance, the 14th resistance and the 15th electricity
Resistance forms amplifier in proportion, and the battery voltage signal after differential amplification amplify with phase.
Further, the second amplifier module 7 further includes third comparator, the electrode input end of the third comparator
It is connected with the output terminal of first comparator, the negative input of the third comparator is connected with the output terminal of third comparator.
Seen from the above description, the input impedance of the third comparator is big and output impedance is small, as voltage follower.
Further, the second amplifier module 7 further includes the 4th comparator, the 16th resistance, the 17th resistance and
Four capacitances, the output terminal of the third comparator are connected by the 11st resistance with the negative input of the 4th comparator, and the 4th
The electrode input end of comparator is connected with one end of the 17th resistance, the other end of the 17th resistance ground connection, the 16th resistance and
4th capacitance is in parallel, and one end of the 4th capacitance is connected with the negative input of the 4th comparator, the other end of the 4th capacitance and the
The cathode of two diodes is connected.
Seen from the above description, the 4th comparator, the 11st resistance, the 16th resistance, the 17th resistance and the 4th capacitance
Reverse phase amplification amplifier is formed, the negative cell voltage signal of sampling is carried out being turned into positive battery voltage signal.
Further, first filter module 5 include the 18th resistance and the 5th capacitance, the one of the 18th resistance
End is connected with one end of the 5th capacitance, and one end of the 5th capacitance is connected with processor, another termination of the 5th capacitance
Ground, the other end of the 18th resistance are connected with the cathode of the first diode.
Seen from the above description, the 18th resistance and the 5th capacitance composition RC filter circuits, to same mutually amplified sampling
Battery voltage signal be filtered.
Further, second filter module 8 include the 19th resistance and the 6th capacitance, the one of the 19th resistance
End is connected with one end of the 6th capacitance, and one end of the 6th capacitance is connected with processor, another termination of the 6th capacitance
Ground, the other end of the 19th resistance are connected with the cathode of the second diode.
Seen from the above description, the 19th resistance and the 6th capacitance composition RC filter circuits, the amplified sampling to reverse phase
Battery voltage signal be filtered.
Referring to Fig.1 and 2, the embodiment one of the utility model is：
A kind of battery voltage detection circuit is transported including sequentially connected voltage sample module 2, isolation amplifier module 3, first
Amplification module 4, the first filter module 5 and processor 6, the voltage sample module 2 are connected with battery 1 to be measured, further include successively
The the second amplifier module 7 and the second filter module 8 of connection, the first amplifier module 4 is connected with the second amplifier module 7, described
Second filter module 8 is connected with the processor 6；
The first amplifier module 4 includes the 8th resistance, the 9th resistance, the tenth resistance, the 14th resistance, the first diode
With the first amplifier chip, in embodiment, the first amplifier chip model OPA2348, the first pin of the first amplifier chip passes through
Tenth resistance is connected with the 5th pin of the first amplifier chip, and the 7th pin of the first amplifier chip passes through the first diode and
One filter module is connected, and the third pin of the first amplifier chip is connected by the 8th resistance with isolation amplifier module 3, the first amplifier
The second pin of chip is connected by the 9th resistance with isolation amplifier module 3, and the 6th pin of the first amplifier chip passes through the tenth
Four resistance are connected to the ground；
The second amplifier module 7 includes the 11st resistance, the 17th resistance, the second diode and the second amplifier chip,
In embodiment, the second amplifier chip model OPA2348, the third pin of second amplifier chip and the first amplifier chip
First pin is connected, and the second pin of the second amplifier chip is connected with the first pin of the second amplifier chip, the second amplifier chip
The first pin be connected by the 11st resistance with the 6th pin of the second amplifier chip, the 7th pin of the second amplifier chip leads to
It crosses the second diode with the second filter module 8 to be connected, the 5th pin of the second amplifier chip is connected to the ground by the 17th resistance；
The voltage sample module 2 includes first resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the
Six resistance and the 7th resistance, the first resistor are connected by second resistance with 3rd resistor, and the 4th resistance passes through the 5th
Resistance is connected with the 6th resistance, and the 3rd resistor is connected by the 7th resistance with the 5th resistance；
The isolation amplifier module 3 includes isolation amplifier chip, and in embodiment, isolation amplifier chip selects AMC1301, institute
The second pin that 3rd resistor is stated with isolation amplifier chip is connected, the third pin phase of the 6th resistance and isolation amplifier chip
Even, the 7th pin of the isolation amplifier chip is connected by the 8th resistance with the third pin of the first amplifier chip, it is described every
The 6th pin from amplifier chip is connected by the 9th resistance with the second pin of the first amplifier chip；
Third diode, the 4th diode, the 5th diode and the 6th diode are further included, the third diode is just
Pole, the cathode of the 4th diode, the anode of the 5th diode and the cathode of the 6th diode are connected respectively with processor, and described
The cathode of the cathode of three diodes and the 5th diode is connected respectively with the first power supply, and in embodiment, the first power supply selects 3.3V,
Third diode, the 4th diode, the 5th diode and the 6th diode select SD103AWS, the anode of the 4th diode
With the plus earth of the 6th diode；
The first amplifier module 4 further includes first comparator, the first capacitance, the second capacitance, the 12nd resistance and the tenth
Three resistance, first capacitance and the 12nd resistor coupled in parallel, the 12nd resistance one end ground connection, the other end of the 12nd resistance with
The electrode input end of first comparative degree is connected, second capacitance and the 13rd resistor coupled in parallel, one end of second capacitance with
The negative input of first comparator is connected, and the other end of second capacitance is connected with the output terminal of first comparator；
The first amplifier module 4 further includes the second comparator, third capacitance, the 14th resistance and the 15th resistance, institute
The output terminal of a termination first comparator of the tenth resistance is stated, the anode of the second comparator of another termination of the tenth resistance is defeated
Entering end, the negative input of second comparator of termination of the 14th resistance, the other end of the 14th resistance is grounded,
The third capacitance and the 15th resistor coupled in parallel, the negative input of second comparator of termination of the third capacitance are described
The cathode of the first diode of another termination of third capacitance；
The second amplifier module 7 further includes third comparator, the electrode input end of the third comparator and the first ratio
Output terminal compared with device is connected, and the negative input of the third comparator is connected with the output terminal of third comparator；
The second amplifier module 7 further includes the 4th comparator, the 16th resistance, the 17th resistance and the 4th capacitance, institute
The output terminal for stating third comparator is connected by the 11st resistance with the negative input of the 4th comparator, and the 4th comparator is just
Pole input terminal is connected with one end of the 17th resistance, and the other end ground connection of the 17th resistance, the 16th resistance and the 4th capacitance are simultaneously
Connection, one end of the 4th capacitance is connected with the negative input of the 4th comparator, the other end of the 4th capacitance and the second diode
Cathode is connected；
First filter module 5 includes the 18th resistance and the 5th capacitance, one end and the 5th of the 18th resistance
One end of capacitance is connected, and one end of the 5th capacitance is connected with processor, the other end of the 5th capacitance ground connection, and described the
The other end of 18 resistance is connected with the cathode of the first diode；
Second filter module 8 includes the 19th resistance and the 6th capacitance, one end and the 6th of the 19th resistance
One end of capacitance is connected, and one end of the 6th capacitance is connected with processor, the other end of the 6th capacitance ground connection, and described the
The other end of 19 resistance is connected with the cathode of the second diode.
In conclusion a kind of battery voltage detection circuit provided by the utility model, by first resistor, second resistance,
4th resistance and the 5th resistance carry out current limliting partial pressure, battery forward direction input voltage up to 1000V, negative sense input voltage can it is big-
1000V, the 7th resistance carry out voltage sample, the battery voltage signal that can be sampled, by isolation amplifier module to sampling
Battery voltage signal carry out isolation amplification, when sampling battery voltage signal be positive voltage when, the first diode current flow is described
First comparator, the first capacitance, the second capacitance, the 8th resistance, the 9th resistance, the 12nd resistance and the 13rd resistance composition difference
Amplifier is amplified the battery voltage signal after Amplification and insulation, second comparator, third capacitance, the tenth resistance, the tenth
Four resistance and the 15th resistance form amplifier in proportion, and the battery voltage signal after differential amplification is carried out, with mutually amplifying, to put
Battery voltage signal after big is transferred to after the first filter module and exports positive cell voltage through processor, at this time reverse battery electricity
It presses as no signal；When the battery voltage signal of sampling is negative voltage, the second diode current flow, the third comparator is used as electricity
Press follower, the 4th comparator, the 11st resistance, the 16th resistance, the 17th resistance and the 4th capacitance composition reverse phase amplification fortune
It puts, the negative cell voltage signal of sampling is carried out being turned into positive battery voltage signal, the amplified cell voltage of reverse phase is believed
It number is transferred to after the second filter module and exports reverse battery voltage through processor, positive cell voltage is no signal at this time；It is described
Battery voltage detection circuit battery voltage detection range it is wide, it is simple in structure, can realize DC charging motor charging before to electricity
Motor-car battery voltage detection circuit also can detect voltage during battery reversal connection simultaneously.
The above description is only the embodiments of the present invention, and it does not limit the scope of the patent of the present invention, every
Equivalents made based on the specification and figures of the utility model are directly or indirectly used in relevant technology neck
Domain is equally included in the patent within the scope of the utility model.
Claims (10)
1. a kind of battery voltage detection circuit, which is characterized in that including sequentially connected voltage sample module, isolation amplifier mould
Block, the first amplifier module, the first filter module and processor, the voltage sample module are connected with battery to be measured, further include
Sequentially connected second amplifier module and the second filter module, the first amplifier module are connected with the second amplifier module, and second
Filter module is connected with the processor；
The first amplifier module includes the 8th resistance, the 9th resistance, the tenth resistance, the 14th resistance, the first diode and the
One amplifier chip, the first pin of the first amplifier chip are connected by the tenth resistance with the 5th pin of the first amplifier chip, the
7th pin of one amplifier chip is connected by the first diode with the first filter module, and the third pin of the first amplifier chip leads to
It crosses the 8th resistance with isolation amplifier module to be connected, the second pin of the first amplifier chip passes through the 9th resistance and isolation amplifier module
It is connected, the 6th pin of the first amplifier chip is connected to the ground by the 14th resistance；
The second amplifier module includes the 11st resistance, the 17th resistance, the second diode and the second amplifier chip, and described the
The third pin of two amplifier chips is connected with the first pin of the first amplifier chip, the second pin of the second amplifier chip and second
First pin of amplifier chip is connected, the first pin of the second amplifier chip pass through the 11st resistance and the second amplifier chip
Six pins are connected, and the 7th pin of the second amplifier chip is connected by the second diode with the second filter module, the second amplifier core
5th pin of piece is connected to the ground by the 17th resistance.
2. a kind of battery voltage detection circuit according to claim 1, which is characterized in that the voltage sample module includes
First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance and the 7th resistance, the first resistor
It is connected by second resistance with 3rd resistor, the 4th resistance is connected by the 5th resistance with the 6th resistance, the third electricity
Resistance is connected by the 7th resistance with the 5th resistance.
3. a kind of battery voltage detection circuit according to claim 2, which is characterized in that the isolation amplifier module includes
Isolation amplifier chip, the 3rd resistor are connected with the second pin of isolation amplifier chip, the 6th resistance and isolation amplifier
The third pin of chip is connected, and the 7th pin of the isolation amplifier chip passes through the 8th resistance and the third of the first amplifier chip
Pin is connected, and the 6th pin of the isolation amplifier chip is connected by the 9th resistance with the second pin of the first amplifier chip.
4. a kind of battery voltage detection circuit according to claim 1, which is characterized in that further include third diode,
Four diodes, the 5th diode and the 6th diode, the anode of the third diode, the cathode of the 4th diode, the five or two
The cathode of the anode of pole pipe and the 6th diode is connected respectively with processor, the cathode and the 5th diode of the third diode
Cathode be connected respectively with the first power supply, the anode of the 4th diode and the plus earth of the 6th diode.
5. a kind of battery voltage detection circuit according to claim 1, which is characterized in that the first amplifier module is also wrapped
Include first comparator, the first capacitance, the second capacitance, the 12nd resistance and the 13rd resistance, first capacitance and the 12nd electricity
Resistance is in parallel, and one end ground connection of the 12nd resistance, the other end of the 12nd resistance is connected with the electrode input end of the first comparative degree, institute
The second capacitance and the 13rd resistor coupled in parallel are stated, one end of second capacitance is connected with the negative input of first comparator, institute
The other end for stating the second capacitance is connected with the output terminal of first comparator.
6. a kind of battery voltage detection circuit according to claim 5, which is characterized in that the first amplifier module is also wrapped
The second comparator, third capacitance, the 14th resistance and the 15th resistance are included, a termination first comparator of the tenth resistance
Output terminal, the electrode input end of the second comparator of another termination of the tenth resistance, a termination the of the 14th resistance
The negative input of two comparators, the other end ground connection of the 14th resistance, the third capacitance and the 15th resistor coupled in parallel,
The negative input of one the second comparator of termination of the third capacitance, the first diode of another termination of the third capacitance
Cathode.
7. a kind of battery voltage detection circuit according to claim 5, which is characterized in that the second amplifier module is also wrapped
Third comparator is included, the electrode input end of the third comparator is connected with the output terminal of first comparator, and the third compares
The negative input of device is connected with the output terminal of third comparator.
8. a kind of battery voltage detection circuit according to claim 7, which is characterized in that the second amplifier module is also wrapped
The 4th comparator, the 16th resistance, the 17th resistance and the 4th capacitance are included, the output terminal of the third comparator passes through the 11st
Resistance is connected with the negative input of the 4th comparator, one end phase of the electrode input end and the 17th resistance of the 4th comparator
Even, the other end ground connection of the 17th resistance, the 16th resistance and the 4th capacitance are in parallel, one end and the 4th comparator of the 4th capacitance
Negative input be connected, the other end of the 4th capacitance is connected with the cathode of the second diode.
9. a kind of battery voltage detection circuit according to claim 1, which is characterized in that first filter module includes
18th resistance and the 4th capacitance, one end of the 18th resistance are connected with one end of the 4th capacitance, the 4th capacitance
One end is connected with processor, the other end ground connection of the 4th capacitance, the other end and the first diode of the 18th resistance
Cathode be connected.
A kind of 10. battery voltage detection circuit according to claim 1, which is characterized in that the second filter module packet
The 19th resistance and the 5th capacitance are included, one end of the 19th resistance is connected with one end of the 5th capacitance, the 5th capacitance
One end be connected with processor, the other end of the 5th capacitance ground connection, the other end of the 19th resistance and the one or two pole
The cathode of pipe is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721532600.8U CN207586396U (en) | 2017-11-16 | 2017-11-16 | A kind of battery voltage detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721532600.8U CN207586396U (en) | 2017-11-16 | 2017-11-16 | A kind of battery voltage detection circuit |
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| CN207586396U true CN207586396U (en) | 2018-07-06 |
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| CN (1) | CN207586396U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741571A (en) * | 2017-11-16 | 2018-02-27 | 深圳市思达仪表有限公司 | A kind of battery voltage detection circuit |
| CN107741571B (en) * | 2017-11-16 | 2024-04-30 | 深圳市思达仪表有限公司 | Battery voltage detection circuit |
-
2017
- 2017-11-16 CN CN201721532600.8U patent/CN207586396U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107741571A (en) * | 2017-11-16 | 2018-02-27 | 深圳市思达仪表有限公司 | A kind of battery voltage detection circuit |
| CN107741571B (en) * | 2017-11-16 | 2024-04-30 | 深圳市思达仪表有限公司 | Battery voltage detection circuit |
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