CN110441699A - Battery voltage detection circuit and battery voltage detector - Google Patents
Battery voltage detection circuit and battery voltage detector Download PDFInfo
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- CN110441699A CN110441699A CN201910689811.XA CN201910689811A CN110441699A CN 110441699 A CN110441699 A CN 110441699A CN 201910689811 A CN201910689811 A CN 201910689811A CN 110441699 A CN110441699 A CN 110441699A
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- 238000001514 detection method Methods 0.000 title claims abstract description 45
- 230000003750 conditioning effect Effects 0.000 claims abstract description 55
- 239000004065 semiconductor Substances 0.000 claims description 42
- 230000005611 electricity Effects 0.000 claims description 26
- 206010037660 Pyrexia Diseases 0.000 claims description 15
- 238000012806 monitoring device Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 claims description 8
- 230000003321 amplification Effects 0.000 claims description 6
- 238000003199 nucleic acid amplification method Methods 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims 2
- 230000003760 hair shine Effects 0.000 claims 1
- 238000005192 partition Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- 239000002253 acid Substances 0.000 description 2
- 229910002056 binary alloy Inorganic materials 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000003862 health status Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
- H03K17/78—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled
- H03K17/795—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors
- H03K17/7955—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used using opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled controlling bipolar transistors using phototransistors
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/94—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated
- H03K17/941—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector
- H03K17/943—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the way in which the control signals are generated using an optical detector using a plurality of optical emitters or detectors, e.g. keyboard
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Abstract
The present invention relates to a kind of battery voltage detection circuits, comprising: battery pack, battery selection circuit, switching circuit and voltage conditioning circuit；Switching sub-circuit includes first switch sub-circuit and second switch sub-circuit, first switch sub-circuit includes the first exciting unit and the first onunit, first exciting unit and the first onunit separate setting, and the first exciting unit is used to adjust the on off operating mode of the first onunit；Second switch sub-circuit includes the second exciting unit and the second onunit, and the second exciting unit and the second onunit separate setting, and the second exciting unit is used to adjust the on off operating mode of the second onunit.First exciting unit and the first onunit separate setting, second exciting unit and the second onunit separate setting, so that battery selection circuit is mutually isolated with battery, reduce interference of the battery selection circuit to battery detecting, to improve the detection stability to battery.
Description
Technical field
The present invention relates to battery detecting technical fields, examine more particularly to a kind of battery voltage detection circuit and cell voltage
Survey device.
Background technique
With the continuous development of supply network technology, in order to guarantee power supply reliability, substation, data center and communication base
The ground such as stand generally use lead-acid battery as direct current standby electricity, and in practical applications, these lead-acid batteries are generally connected into battery
Group, and worked mostly in floating charge state.In order to judge the health status of battery pack, need to measure each monomer electricity in battery pack
The voltage in pond, traditional voltage of serially-connected cells measurement method that is mainly used for is direct Detection Method.
Direct Detection Method is directly to measure the voltage of each battery, but this method is not suitable for many batteries and is connected into
Battery pack, once because the global voltage of series-connected cell group be higher than detection circuit supply voltage, will result in circuit damage.Separately
Outside, the measuring circuit of direct Detection Method must be with battery pack altogether, this is easy to introduce interference in the detection system, influences detection system
The job stability of system.
Summary of the invention
Based on this, it is necessary to a kind of interference when providing reduction to battery detecting and improve to the detection stability of battery
Battery voltage detection circuit and battery voltage detector.
A kind of battery voltage detection circuit, comprising: battery pack, battery selection circuit, switching circuit and voltage conditioning electricity
Road；The input terminal of the battery selection circuit has multiple for connecting external signal selection device, the battery selection circuit
Output end, the switching circuit include multiple switch sub-circuit, each output end of the battery selection circuit with opened described in one
The electrical connection of climax circuit input end, the battery pack are sequentially connected in series by multiple batteries, each switch sub-circuit and one
The battery is correspondingly connected with；The switch sub-circuit includes first switch sub-circuit and second switch sub-circuit, and described first opens
Climax circuit includes the first exciting unit and the first onunit, and the output end of the battery selection circuit swashs with described first
Encourage unit first end electrical connection, first exciting unit second end ground connection, the battery anode with its corresponding to
The second end of first onunit is electrically connected, and the of the first end of first onunit and the voltage conditioning circuit
One input terminal electrical connection, wherein first exciting unit and first onunit separate setting, and first excitation is single
Member is for adjusting the on off operating mode of first onunit；The second switch sub-circuit includes the second exciting unit and the
Two onunits, the output end of the battery selection circuit are electrically connected with the first end of second exciting unit, and described second
The second end of exciting unit is grounded, the second end electricity of the second input terminal of the voltage conditioning circuit and second onunit
Connection, the cathode of the battery with its corresponding to the first end of second onunit be electrically connected, wherein described second is sharp
It encourages unit and second onunit separates setting, second exciting unit is used to adjust the logical of second onunit
Disconnected state；The output voltage for the first end that the voltage conditioning circuit is used to obtain first onunit is led with described second
The difference voltage of the output voltage of the second end of logical unit, the output end of the voltage conditioning circuit is used for and external monitoring devices
Connection, is also used to export the difference voltage to external monitoring devices.
First exciting unit includes the first photophore, the first onunit packet in one of the embodiments,
The first light-receiving device is included, the output end of the battery selection circuit is electrically connected with the first end of first photophore, and described first
The second end of photophore is grounded, and the anode of the battery is electrically connected with the second end of first light-receiving device, first light
The first end of device is electrically connected with the first input end of the voltage conditioning circuit.
First photophore includes the first light emitting diode, the battery selection circuit in one of the embodiments,
The anode of output end and first light emitting diode be electrically connected, the cathode of first light emitting diode is grounded, described the
One light-receiving device includes the first photosensitive semiconductor pipe and the first photo resistance, and first photo resistance is photosensitive as described first
The base stage of transistor, first photo resistance are used to incude the light of the first light emitting diode transmitting, the battery
Anode be electrically connected with the collector of the first photosensitive semiconductor pipe, the emitter of the first photosensitive semiconductor pipe with it is described
The first input end of voltage conditioning circuit is electrically connected.
First exciting unit includes the first fever galvanic couple, the battery selection circuit in one of the embodiments,
Output end with it is described first fever galvanic couple anode be electrically connected, it is described first fever galvanic couple cathode be grounded, described first leads
Logical unit includes the first heat-sensitive semiconductive pipe and the first thermistor, and first thermistor is as first temperature-sensitive half
The base stage of conductor tube, first thermistor is for incuding the accidental heat penetrated of first heating electric, and the battery is just
Pole is electrically connected with the collector of the first heat-sensitive semiconductive pipe, the emitter and the voltage of the first heat-sensitive semiconductive pipe
The first input end of conditioning circuit is electrically connected.
First exciting unit includes first pressure device in one of the embodiments, the battery selection circuit
Output end is electrically connected with the anode of the first pressure device, the cathode ground connection of the first pressure device, first onunit
Including the first pressure-sensitive semiconductor pipe and the first varistor, first varistor is as the first pressure-sensitive semiconductor pipe
Base stage, first varistor is used to incude the pressure that the first pressure device applies, the anode of the battery with it is described
The collector of first pressure-sensitive semiconductor pipe is electrically connected, the emitter of the first pressure-sensitive semiconductor pipe and the voltage conditioning circuit
First input end electrical connection.
The battery selection circuit includes that piece selects chip and not circuit, described choosing in one of the embodiments,
The input terminal of chip is for connecting external signal selection device, the input of the described output end for selecting chip and the not circuit
End electrical connection, the not circuit have multiple output ends, each output end and the switching circuit of the not circuit
An input terminal electrical connection.
The battery selection circuit further includes power amplifier chip in one of the embodiments, the not circuit
Output end is connect with the input terminal of the power amplifier chip, and the power amplifier chip has multiple output ends, the power
Each output end of amplification chip is electrically connected with an input terminal of the switching circuit.
The voltage conditioning circuit includes difference channel in one of the embodiments, and the difference channel includes first
The first end of operational amplifier, first resistor, second resistance, 3rd resistor and the 4th resistance, first onunit is logical
It crosses the first resistor to be electrically connected with the inverting input terminal of first operational amplifier, the reverse phase of first operational amplifier
Input terminal also passes through the 4th resistance and is electrically connected with the output end of first operational amplifier, second onunit
Second end by the non-inverting input terminal of the second resistance and first operational amplifier, first operational amplifier it is same
Phase input terminal is also grounded by the 3rd resistor.
The voltage conditioning circuit further includes amplifying circuit in one of the embodiments, and the amplifying circuit includes the
Two operational amplifiers, the 5th resistance, the 6th resistance and the 7th resistance, the output end of first operational amplifier pass through described
6th resistance is electrically connected with the inverting input terminal of the second operational amplifier, the inverting input terminal of the second operational amplifier
It is also electrically connected by the 5th resistance with the output end of the second operational amplifier, the same phase of the second operational amplifier
Input terminal passes through the 7th resistance eutral grounding.
A kind of battery voltage detector, including any of the above-described battery voltage detection circuit as described in the examples.
In above-mentioned battery voltage detection circuit and battery voltage detector, battery selection circuit is the first exciting unit
There is provided cut-in voltage with the second exciting unit, when the first exciting unit and the second exciting unit are opened, the first onunit and
The conducting of second onunit, the first exciting unit and the first onunit separate setting, and the second exciting unit and the second conducting are single
Member separates setting, so that battery selection circuit is mutually isolated with battery, reduces interference of the battery selection circuit to battery detecting,
To improve the detection stability to battery.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the battery voltage detection circuit of an embodiment；
Fig. 2 is the circuit diagram of the battery voltage detection circuit of Fig. 1；
Fig. 3 is the circuit diagram of the battery selection circuit of an embodiment；
Fig. 4 is the circuit diagram of the voltage conditioning circuit of an embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
It should be noted that it can directly on the other element when element is referred to as " being set to " another element
Or there may also be elements placed in the middle.When an element is considered as " connection " another element, it, which can be, is directly connected to
To another element or it may be simultaneously present centering elements.Term as used herein " vertical ", " horizontal ", " left side ",
" right side " and similar statement for illustrative purposes only, are not meant to be the only embodiment.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Used term is intended merely to describe specific reality in the description of the invention
Apply the purpose of mode, it is not intended that in the limitation present invention.Term " and or " used herein includes one or more relevant
Any and all combinations of listed item.
For example, a kind of battery voltage detection circuit, comprising: battery pack, battery selection circuit, switching circuit and voltage tune
Manage circuit；For connecting external signal selection device, the battery selection circuit has the input terminal of the battery selection circuit
Multiple output ends, the switching circuit include multiple switch sub-circuit, each output end of the battery selection circuit and an institute
Switch sub-circuit input terminal electrical connection is stated, the battery pack is sequentially connected in series by multiple batteries, each switch sub-circuit
It is correspondingly connected with a battery；The switch sub-circuit includes first switch sub-circuit and second switch sub-circuit, and described
One switch sub-circuit includes the first exciting unit and the first onunit, the output end of the battery selection circuit and described the
The first end of one exciting unit is electrically connected, the second end ground connection of first exciting unit, and the anode of the battery and its institute are right
The second end for first onunit answered is electrically connected, the first end of first onunit and the voltage conditioning circuit
First input end electrical connection, wherein first exciting unit and first onunit separate setting, and described first swashs
Unit is encouraged for adjusting the on off operating mode of first onunit；The second switch sub-circuit include the second exciting unit with
And second onunit, the output end of the battery selection circuit is electrically connected with the first end of second exciting unit, described
The second end of second exciting unit is grounded, and the second of the second input terminal of the voltage conditioning circuit and second onunit
End electrical connection, the cathode of the battery with its corresponding to the first end of second onunit be electrically connected, wherein described the
Two exciting units and second onunit separate setting, and second exciting unit is for adjusting second onunit
On off operating mode；The voltage conditioning circuit is used to obtain the output voltage and described the of the first end of first onunit
The output end of the difference voltage of the output voltage of the second end of two onunits, the voltage conditioning circuit is used for and external monitoring
Device connection, is also used to export the difference voltage to external monitoring devices.In above-mentioned battery voltage detection circuit, battery
Selection circuit provides cut-in voltage for the first exciting unit and the second exciting unit, when the first exciting unit and the second exciting unit
When unlatching, the first onunit and the conducting of the second onunit, the first exciting unit and the separation of the first onunit are arranged, and second
Exciting unit and the second onunit separate setting, so that battery selection circuit is mutually isolated with battery, reduce battery selection
Interference of the circuit to battery detecting, to improve the detection stability to battery.
Referring to Fig. 1, it is the battery voltage detection circuit 10 of an embodiment, comprising: battery pack 100, battery selection electricity
Road 200, switching circuit 300 and voltage conditioning circuit 400；The input terminal of the battery selection circuit 200 is for connecting outside
Signal selecting, the battery selection circuit 200 have multiple output ends, and the switching circuit 300 includes multiple switch
Circuit 301, each output end of the battery selection circuit 200 is electrically connected with 301 input terminal of switch sub-circuit, described
Battery pack 100 is sequentially connected in series by multiple batteries 110, and each switch sub-circuit 301 is corresponding with a battery 110 to be connected
It connects；Referring to Figure 2 together, the switch sub-circuit 301 includes first switch sub-circuit 310 and second switch sub-circuit 320, institute
Stating first switch sub-circuit 310 includes the first exciting unit 311 and the first onunit 312, the battery selection circuit 200
Output end be electrically connected with the first end of first exciting unit 311, the second end of first exciting unit 311 ground connection,
The anode of the battery 110 with its corresponding to the second end of first onunit 312 be electrically connected, described first is connected singly
The first end of member 312 is electrically connected with the first input end of the voltage conditioning circuit 400, wherein first exciting unit 311
Separate with first onunit 312 and be arranged, first exciting unit 311 is for adjusting first onunit 312
On off operating mode；The second switch sub-circuit 320 includes the second exciting unit 321 and the second onunit 322, the electricity
The output end of pond selection circuit 200 is electrically connected with the first end of second exciting unit 321, second exciting unit 321
Second end ground connection, the second input terminal of the voltage conditioning circuit 400 and the second end of second onunit 322 are electrically connected
Connect, the cathode of the battery 110 with its corresponding to the first end of second onunit 322 be electrically connected, wherein described
Two exciting units 321 and second onunit 322 separate setting, and second exciting unit 321 is for adjusting described the
The on off operating mode of two onunits 322；The voltage conditioning circuit 400 is for obtaining the first of first onunit 312
The difference voltage of the output voltage of the second end of the output voltage at end and second onunit 322, the voltage conditioning electricity
The output end on road 400 is also used to export the difference voltage to external monitoring devices for connecting with external monitoring devices.In
In one embodiment, the first switch sub-circuit further includes the first current-limiting resistance, and the second switch sub-circuit further includes second
Current-limiting resistance, the first end of first current-limiting resistance are electrically connected with the output end of the battery selection circuit, first limit
The second end of leakage resistance is electrically connected with the first end of first exciting unit, the first end of second current-limiting resistance with it is described
The output end of battery selection circuit is electrically connected, the first end of the second end of second current-limiting resistance and second exciting unit
Electrical connection reduces the battery selection circuit output electric current mistake in this way, the electric current of battery selection circuit output is limited
First exciting unit and second exciting unit is caused to damage greatly.
In the present embodiment, battery selection circuit 200 is that the first exciting unit 311 and the second exciting unit 321 provide out
Voltage is opened, when the first exciting unit 311 and the unlatching of the second exciting unit 321, the first onunit 312 and the second onunit
322 conductings, the first exciting unit 311 and the first onunit 312 separate setting, and the second exciting unit 321 and the second conducting are single
Member 322 separates setting, so that battery selection circuit 200 and battery pack 100 are mutually isolated, it is right to reduce battery selection circuit 200
The interference that battery 110 detects, to improve the detection stability to battery 110.
In one embodiment, referring to Fig. 2, first exciting unit 311 includes the first photophore, described first is led
Logical unit 312 includes the first light-receiving device, the first end electricity of the output end of the battery selection circuit 200 and first photophore
Connection, the second end ground connection of first photophore, the second end of the anode and first light-receiving device of the battery 110 are electrically connected
It connects, the first end of first light-receiving device is electrically connected with the first input end of the voltage conditioning circuit 400.In the present embodiment
In, the first end of first photophore is connect with the output end of the battery selection circuit 200, i.e., the described battery selection circuit
200 send pumping signal namely the battery selection circuit 200 to first photophore opens to first photophore transmission
Signal is opened, so that first photophore is connected, and launches light, the sensing part of first light-receiving device is described in
First photophore, so that the light of first photophore transmitting is incuded by first light-receiving device, so that described first
Light-receiving device conducting.In this way, corresponding first photophore is opened when 200 selection signal of battery selection circuit is sent,
By the induction of light, first light-receiving device is opened, and the anode electricity of battery 110 is obtained convenient for the voltage conditioning circuit 400
Pressure, so that first photophore and first light-receiving device are mutually isolated, so that the battery selection circuit 200 and electricity
Pond 110 is mutually separated, reduces the interference that the battery selection circuit 200 detects 110 cathode voltage of battery, improves to electricity
The stability of 110 anode detection of pond.
In one embodiment, referring to Fig. 2, second exciting unit 321 includes the second photophore, described second is led
Logical unit 322 includes the second light-receiving device, the first end electricity of the output end of the battery selection circuit 200 and second photophore
Connection, the second end ground connection of second photophore, the second input terminal of the voltage conditioning circuit 400 and second light
The second end of device is electrically connected, and the first end of second light-receiving device is electrically connected with the cathode of the battery 110.In the present embodiment
In, the first end of second photophore is connect with the output end of the battery selection circuit 200, i.e., the described battery selection circuit
200 send pumping signal namely the battery selection circuit 200 to second photophore opens to second photophore transmission
Signal is opened, so that second photophore is connected, and launches light, the sensing part of second light-receiving device is described in
First photophore, so that the light of second photophore transmitting is incuded by second light-receiving device, so that described second
Light-receiving device conducting.In this way, corresponding second photophore is opened when 200 selection signal of battery selection circuit is sent,
By the induction of light, second light-receiving device is opened, and the negative electricity of battery 110 is obtained convenient for the voltage conditioning circuit 400
Pressure, so that second photophore and second light-receiving device are mutually isolated, so that the battery selection circuit 200 and electricity
Pond 110 is mutually separated, reduces the interference that the battery selection circuit 200 detects 110 cathode voltage of battery, improves to electricity
The stability of 110 cathode of pond detection.
In one embodiment, first photophore include the first light emitting diode, the battery selection circuit it is defeated
The anode of outlet and first light emitting diode be electrically connected, and the cathode of first light emitting diode is grounded, described first by
Light device includes the first photosensitive semiconductor pipe and the first photo resistance, and first photo resistance photosensitive is partly led as described first
The base stage of body pipe, first photo resistance are used to incude the light of the first light emitting diode transmitting, and the battery is just
Pole is electrically connected with the collector of the first photosensitive semiconductor pipe, the emitter and the voltage of the first photosensitive semiconductor pipe
The first input end of conditioning circuit is electrically connected.In the present embodiment, it is preset when the output voltage of the battery selection circuit is greater than
When value, first LEDs ON, and for emitting light, the light of the first light emitting diode transmitting is by institute
The first photo resistance reception is stated, the first photosensitive semiconductor pipe is connected for first photo resistance, so that first light
The collector and emitter of sensitive semiconductor pipe is connected, so that the first input of the anode of battery and the voltage conditioning circuit
End conducting, so that the voltage conditioning circuit obtains the cathode voltage of detected battery.In this way, due to described first shine
It is that non-electric connection is realized by light conduction between diode and first photo resistance, so that described first luminous two
Pole pipe and the first photosensitive semiconductor pipe are mutually isolated, so that the battery selection circuit and tested cell partition, subtract
Lack the interference when battery selection circuit detects anode, improves the detection stability to anode.
In one embodiment, second photophore include the second light emitting diode, the battery selection circuit it is defeated
The anode of outlet and second light emitting diode be electrically connected, and the cathode of second light emitting diode is grounded, described second by
Light device includes the second photosensitive semiconductor pipe and the second photo resistance, and second photo resistance photosensitive is partly led as described second
The base stage of body pipe, second photo resistance are used to incude the light of the second light emitting diode transmitting, and the battery is born
Pole is electrically connected with the transmission pole of the second photosensitive semiconductor pipe, the collector and the voltage of the second photosensitive semiconductor pipe
Second input terminal of conditioning circuit is electrically connected.In the present embodiment, it is preset when the output voltage of the battery selection circuit is greater than
When value, second LEDs ON, and for emitting light, the light of the second light emitting diode transmitting is by institute
The second photo resistance reception is stated, the second photosensitive semiconductor pipe is connected for second photo resistance, so that second light
The collector and emitter of sensitive semiconductor pipe is connected, so that the second input of the cathode of battery and the voltage conditioning circuit
End conducting, so that the voltage conditioning circuit obtains the cathode voltage of detected battery.In this way, due to described second shine
It is that non-electric connection is realized by light conduction between diode and second photo resistance, so that described second luminous two
Pole pipe and the second photosensitive semiconductor pipe are mutually isolated, so that the battery selection circuit and tested cell partition, subtract
Lack the interference when battery selection circuit detects battery cathode, improves the detection stability to battery cathode.
In one embodiment, first exciting unit include first fever galvanic couple, the battery selection circuit it is defeated
Outlet is electrically connected with the anode of the first fever galvanic couple, the cathode ground connection of the first fever galvanic couple, and first conducting is single
Member includes the first heat-sensitive semiconductive pipe and the first thermistor, and first thermistor is as first heat-sensitive semiconductive
The base stage of pipe, first thermistor for incuding the accidental heat penetrated of first heating electric, the anode of the battery with
The collector of the first heat-sensitive semiconductive pipe is electrically connected, and the emitter and the voltage of the first heat-sensitive semiconductive pipe improve
The first input end of circuit is electrically connected.In the present embodiment, when the output voltage of the battery selection circuit is greater than preset value,
The first fever galvanic couple conducting, and for distributing heat, the heat that the first fever galvanic couple distributes is by first warm
Quick resistance receives, and the first heat-sensitive semiconductive pipe is connected first thermistor, so that first heat-sensitive semiconductive
The collector and emitter of pipe is connected, so that the anode of battery is connected with the first input end of the voltage conditioning circuit,
So that the voltage conditioning circuit obtains the cathode voltage of detected battery.In this way, due to the first heating electric even summation
It is that non-electric connection is realized by heat transfer between first thermistor, so that described in the first heating electric even summation
One heat-sensitive semiconductive pipe is mutually isolated, so that the battery selection circuit and tested cell partition, reduce the battery
Interference when selection circuit detects anode, improves the detection stability to anode.
In one embodiment, second exciting unit include second fever galvanic couple, the battery selection circuit it is defeated
Outlet is electrically connected with the anode of the second fever galvanic couple, the cathode ground connection of the second fever galvanic couple, and second conducting is single
Member includes the second heat-sensitive semiconductive pipe and the second thermistor, and second thermistor is as second heat-sensitive semiconductive
The base stage of pipe, second thermistor for incuding the accidental heat penetrated of second heating electric, the cathode of the battery with
The emitter of the second heat-sensitive semiconductive pipe is electrically connected, and the collector and the voltage of the second heat-sensitive semiconductive pipe improve
Second input terminal of circuit is electrically connected.In the present embodiment, when the output voltage of the battery selection circuit is greater than preset value,
The second fever galvanic couple conducting, and for distributing heat, the heat that the second fever galvanic couple distributes is by second warm
Quick resistance receives, and the second heat-sensitive semiconductive pipe is connected second thermistor, so that second heat-sensitive semiconductive
The collector and emitter of pipe is connected, so that the cathode of battery is connected with the second input terminal of the voltage conditioning circuit,
So that the voltage conditioning circuit obtains the cathode voltage of detected battery.In this way, due to the second heating electric even summation
It is that non-electric connection is realized by heat transfer between second thermistor, so that described in the second heating electric even summation
Two heat-sensitive semiconductive pipes are mutually isolated, so that the battery selection circuit and tested cell partition, reduce the battery
Interference when selection circuit detects battery cathode, improves the detection stability to battery cathode.
In one embodiment, first exciting unit includes first pressure device, the output of the battery selection circuit
It holds and is electrically connected with the anode of the first pressure device, the cathode of the first pressure device is grounded, and first onunit includes
First pressure-sensitive semiconductor pipe and the first varistor, base of first varistor as the first pressure-sensitive semiconductor pipe
Pole, first varistor are used to incude the pressure that the first pressure device applies, the anode and described first of the battery
The collector of pressure-sensitive semiconductor pipe is electrically connected, and the of the emitter of the first pressure-sensitive semiconductor pipe and the voltage conditioning circuit
The electrical connection of one input terminal.In the present embodiment, when the output voltage of the battery selection circuit is greater than preset value, described first
Pressure device conducting, and for generating extruding force, the extruding force that the first pressure device applies acts on the described first pressure-sensitive electricity
Resistance receives, and the first pressure-sensitive semiconductor pipe is connected first varistor, so that the first pressure-sensitive semiconductor pipe
Collector and emitter conducting, so that the anode of battery is connected with the first input end of the voltage conditioning circuit, so that
Obtain the cathode voltage that the voltage conditioning circuit obtains detected battery.In this way, due to the first pressure device and described
It is that non-electric connection is realized by power conduction between one varistor, so that the first pressure device and described first pressure-sensitive half
Conductor tube is mutually isolated, so that the battery selection circuit and tested cell partition, reduce the battery selection circuit
Interference when to anode detection, improves the detection stability to anode.
In one embodiment, second exciting unit includes second pressure device, the output of the battery selection circuit
It holds and is electrically connected with the anode of the second pressure device, the cathode of the second pressure device is grounded, and second onunit includes
Second pressure-sensitive semiconductor pipe and the second varistor, base of second varistor as the second pressure-sensitive semiconductor pipe
Pole, second varistor are used to incude the pressure that the second pressure device applies, the cathode of the battery and described second
The emitter of pressure-sensitive semiconductor pipe is electrically connected, and the of the collector of the second pressure-sensitive semiconductor pipe and the voltage conditioning circuit
The electrical connection of two input terminals.In the present embodiment, when the output voltage of the battery selection circuit is greater than preset value, described second
Pressure device conducting, and for generating extruding force, the heat that the second pressure device distributes is received by second varistor,
The second pressure-sensitive semiconductor pipe is connected second varistor so that the collector of the second pressure-sensitive semiconductor pipe and
Emitter conducting, so that the cathode of battery is connected with the second input terminal of the voltage conditioning circuit, so that the electricity
Conditioning circuit is pressed to obtain the cathode voltage of detected battery.In this way, due to the second pressure device and the second pressure-sensitive electricity
It is that non-electric connection is realized by power conduction between resistance, so that the second pressure device and the second pressure-sensitive semiconductor pipe phase
Mutually isolation, so that the battery selection circuit and tested cell partition, it is negative to battery to reduce the battery selection circuit
Interference when pole is detected, improves the detection stability to battery cathode.
In one embodiment, referring to Fig. 3, the battery selection circuit 200 includes that piece selects chip 210 and NOT gate electricity
Road 220, described is selected the input terminal of chip 210 for connecting external signal selection device, and described is selected the output end of chip 210
It is electrically connected with the input terminal of the not circuit 220, the not circuit 220 has multiple output ends, the not circuit 220
Each output end be electrically connected with an input terminal of the switching circuit 300.In the present embodiment, described is selected chip 210
Corresponding detected battery is selected according to the chip selection signal of input terminal input, for example, when the battery pack 100 there are 8 battery strings
When connection composition, it is 74LS138 chip that described, which is selected chip 210, and 74LS138 chip is believed according to the binary system that the 1st to 3 end inputs
Number, corresponding binary signal is exported at the 7th end, the 9th to 15 end, particular sheet selection condition can refer to the true value of 74LS138 chip
Table realizes the chip selection signal inputted according to external signal selection device, the detected battery 110 of corresponding selection.Due to 74LS138
It is output low level signal after chip output is selected, that is, the binary system exported is " 0 ", for the ease of subsequent first excitation
The conducting of unit 311 and the second exciting unit 321 needs the signal exported to 74LS138 chip to be changed, i.e., will
The low level signal of 74LS138 chip output is converted to high level signal.By the way that not circuit 220 is arranged, so that 74LS138 core
The output signal of the selected output end of piece changes, so that the low level for the output end output that 74LS138 chip is selected
It is changed into high level, and then convenient for providing enough voltage for the conducting of subsequent first exciting unit and the second exciting unit.And
And the correctness of each output end output signal in order to ensure 74LS138 chip, the not circuit 220 include two
With 6-cmos (Complementary Metal Oxide Semiconductor, complementary metal oxide semiconductor) reverse phase
The 74LS04 chip of device, each 74LS04 chip have 6 phase inverters so that each output end of 74LS138 chip with
One phase inverter is correspondingly connected with, so that the signal of the output end of 74LS138 chip and 74LS04 chip signal output are each other
Radix-minus-one complement signal, so that the output signal of 74LS138 chip is corresponding with 74LS04 chip signal output, it is ensured that the electricity
Selection circuit 200 output signal in pond selects the output signal of chip 210 corresponding with piece, it is ensured that the battery selection circuit 200
The correctness of output signal.
In one embodiment, referring to Fig. 3, the battery selection circuit 200 further includes power amplifier chip 230, institute
The output end for stating not circuit 220 is connect with the input terminal of the power amplifier chip 230, and the power amplifier chip 230 has
There are multiple output ends, each output end of the power amplifier chip 230 and an input terminal of the switching circuit 300 are electrically connected
It connects.In the present embodiment, one of each output end of the battery selection circuit 200 and the power amplifier chip 230
Input terminal connection, the power amplifier chip 230 obtain the chip selection signal that the battery selection circuit 200 exports, the power
The input terminal having the same of amplification chip 230 and output end, and each output end of the power amplifier chip 230 with it is described
One input terminal of power amplifier chip 230 is corresponding, and the power amplifier chip 230 will be defeated from the battery selection circuit 200
Voltage signal out amplifies, and is exported later by the corresponding output end of power amplifier chip 230.For example, the power is put
Large chip 230 includes 74LS245 chip, when the 1st end of 74LS245 chip is high level, the 2nd to 9 end of 74LS245 chip
For input terminal, the 11st to 18 end of 74LS245 chip is output end, wherein the 2nd end and its 18th end pair of 74LS245 chip
It answers, i.e., is exported after the voltage signal amplification of the 2nd end input of 74LS245 chip by the 18th end of 74LS245 chip, it is other
Corresponding situation can be found in the functional pin introduction of 74LS245 chip.In this way, the high level that the battery selection circuit 200 exports
Signal is by exporting amplified voltage signal from corresponding output end after 74LS245 chip, so that the voltage of output is described
Corresponding first exciting unit of tested battery 110 and the second exciting unit that battery selection circuit 200 is chosen provide cut-in voltage,
Consequently facilitating subsequent carry out voltage detecting to tested battery 110.In other embodiments, by changing the 1st of 74LS245 chip
The level at end, for example, when the 1st end of 74LS245 chip is low level, the 2nd to 9 end of 74LS245 chip as output end,
11st to 18 end of 74LS245 chip is as input terminal, and concrete function is identical with above-described embodiment, and details are not described herein again.
In one embodiment, referring to Fig. 4, the voltage conditioning circuit 400 includes difference channel 410, the difference
Circuit 410 includes the first operational amplifier OP1, first resistor R1, second resistance R2,3rd resistor R3 and the 4th resistance R4,
The inverting input terminal that the first end of first onunit passes through the first resistor R1 and the first operational amplifier OP1
Electrical connection, the inverting input terminal of the first operational amplifier OP1 are also put by the 4th resistance R4 with first operation
The second end of the output end electrical connection of big device OP1, second onunit passes through the second resistance R2 and first fortune
The non-inverting input terminal of amplifier OP1 is calculated, the non-inverting input terminal of the first operational amplifier OP1 also passes through the 3rd resistor R3
It is connect with common end.In the present embodiment, the first resistor R1 and the 4th resistance R4 and first operational amplifier
OP1 forms reverse phase amplifying return circuit, the second resistance R2 and the 3rd resistor R3 and the first operational amplifier OP1 is formed
With phase amplifying return circuit.Since the first end of the 3rd resistor R3 and the non-inverting input terminal of the first operational amplifier OP1 connect
Connect, the second end of the 3rd resistor R3 is connect with common end, according to the second end of second onunit input voltage,
Obtain the voltage of the non-inverting input terminal of the first operational amplifier OP1, and the homophase input of the first operational amplifier OP1
The internal resistance of end and inverting input terminal is larger, so that the voltage of the non-inverting input terminal of the first operational amplifier OP1 and the first fortune
The voltage for calculating the inverting input terminal of amplifier OP1 is equal, by the calculating to the reverse phase amplifying return circuit, obtains first fortune
Calculate the output voltage of the output end of amplifier OP1.In this way, the output voltage of the output end of the first operational amplifier OP1 is
The comparison voltage of the voltage of the second end of the voltage of the first end of first onunit and second onunit, i.e. institute
The output voltage and tested battery plus-negative plate difference in voltage for stating the output end of the first operational amplifier OP1 are in certain multiple relationship,
Namely the end voltage of the output voltage of the output end of the first operational amplifier OP1 and tested battery is multiple proportion, wherein
The multiple of the end voltage of the output voltage and tested battery of the output end of the first operational amplifier OP1 has the first resistor
R1, the second resistance R2, the 3rd resistor R3 and the 4th resistance R4 composition.For ease of calculation, in this implementation
In example, the first resistor R1 and the ratio of the 4th resistance R4 and the ratio of the second resistance R2 and the 3rd resistor R3
Be worth it is equal, by can be calculated, the absolute value of the output voltage of the output end of the first operational amplifier OP1 and tested battery
Hold the multiple of the numerical value of voltage for the ratio of the 3rd resistor R3 and the second resistance R2.In other embodiments, described
First resistor R1, the second resistance R2, the resistance value of the 3rd resistor R3 and the 4th resistance R4 are equal, then and described
The absolute value of the output voltage of the output end of one operational amplifier OP1 is the voltage value of tested battery.In this way, tested electrical measurement
After positive and negative pole tension passes through the difference channel 410, the absolute value of the voltage of output and the voltage value of tested battery are to equal, just
Difference is sought in the positive and negative pole tension to tested battery, consequently facilitating obtaining the voltage of tested battery.
In one embodiment, described to put referring to Fig. 4, the voltage conditioning circuit 400 further includes amplifying circuit 420
Big circuit 420 includes second operational amplifier OP2, the 5th resistance R5, the 6th resistance R6 and the 7th resistance R7, first fortune
The output end for calculating amplifier OP1 is electrically connected by the inverting input terminal of the 6th resistance R6 and second operational amplifier OP2
It connects, the inverting input terminal of the second operational amplifier OP2 also passes through the 5th resistance R5 and the second operational amplifier
The output end of OP2 is electrically connected, and the non-inverting input terminal of the second operational amplifier OP2 passes through the 7th resistance R7 and common end
Connection.In the present embodiment, the non-inverting input terminal of the second operational amplifier OP2 is connect with the 7th resistance R7, described
The inverting input terminal of second operational amplifier OP2 with respectively with one end of the 5th resistance R5 and the 6th resistance R6
One end connection, can be calculated, the voltage of the output end of the first operational amplifier OP1 and institute according to operational amplification circuit 420
The voltage for stating the output end of second operational amplifier OP2 has ratio relation, moreover, because the first operational amplifier OP1
Output end is connect by the 6th resistance R6 with the inverting input terminal of the second operational amplifier OP2, so that described first
The polarity of the voltage of the output end of the voltage of the output end of operational amplifier OP1 and the second operational amplifier OP2 is on the contrary, i.e.
The voltage reversal of the output end of the voltage of the output end of the second operational amplifier OP2 and the first operational amplifier OP1,
Namely when the voltage of the output end of the first operational amplifier OP1 is negative voltage, then the second operational amplifier OP2's is defeated
The voltage of outlet is positive voltage.In addition, the voltage of the output end of the first operational amplifier OP1 and second operation amplifier
The voltage relationship of the output end of device OP2 is related to the 5th resistance R5 and the 6th resistance R6, for example, second fortune
The ratio for calculating the voltage of the voltage of the output end of amplifier OP2 and the output end of the first operational amplifier OP1 is described the
The ratio of five resistance R5 and the 6th resistance R6 adjust the output end of the second operational amplifier OP2 according to actual needs
Voltage size.
In one embodiment, the resistance value of the 5th resistance is greater than the resistance value of the 6th resistance, due to described second
The ratio of the voltage of the output end of the voltage of the output end of operational amplifier and first operational amplifier is the 5th electricity
The ratio of resistance and the 6th resistance, so that the absolute value of voltage of the output end of the second operational amplifier is greater than described first
The absolute value of the voltage of the output end of operational amplifier, so that the voltage that the output end of the second operational amplifier exports
Amplified, be convenient for external monitoring devices monitoring voltage, reduce because the voltage monitored is too small judge be tested battery voltage
It is too low, to reduce the False Rate to tested cell health state.In one embodiment, the resistance value and the 6th of the 5th resistance
The resistance value ratio of resistance is (3:1)~(1.5:1)；In other embodiments, the resistance of the resistance value of the 5th resistance and the 6th resistance
Value is than being 2:1.
In one embodiment, it is related to a kind of battery voltage detector, including any of the above-described electricity as described in the examples
Cell voltage detection circuit.
In above-mentioned battery voltage detection circuit, battery selection circuit provides for the first exciting unit and the second exciting unit
Cut-in voltage, when the first exciting unit and the unlatching of the second exciting unit, the first onunit and the conducting of the second onunit, the
One exciting unit and the first onunit separate setting, and the second exciting unit and the second onunit separate setting, so that battery
Selection circuit is mutually isolated with battery, reduces interference of the battery selection circuit to battery detecting, to improve to battery
Detect stability.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of battery voltage detection circuit characterized by comprising battery pack, battery selection circuit, switching circuit and electricity
Press conditioning circuit；
The input terminal of the battery selection circuit has multiple for connecting external signal selection device, the battery selection circuit
Output end, the switching circuit include multiple switch sub-circuit, each output end of the battery selection circuit with opened described in one
The electrical connection of climax circuit input end, the battery pack are sequentially connected in series by multiple batteries, each switch sub-circuit and one
The battery is correspondingly connected with；
The switch sub-circuit includes first switch sub-circuit and second switch sub-circuit, and the first switch sub-circuit includes the
One exciting unit and the first onunit, the first end of the output end of the battery selection circuit and first exciting unit
Positive and corresponding to it first conducting of electrical connection, the second end ground connection of first exciting unit, the battery is single
The second end electrical connection of member, the first end of first onunit and the first input end of the voltage conditioning circuit are electrically connected
It connects, wherein first exciting unit and first onunit separate setting, and first exciting unit is for adjusting institute
State the on off operating mode of the first onunit；The second switch sub-circuit includes the second exciting unit and the second onunit,
The output end of the battery selection circuit is electrically connected with the first end of second exciting unit, and the of second exciting unit
Two ends ground connection, the second input terminal of the voltage conditioning circuit are electrically connected with the second end of second onunit, the electricity
The cathode in pond with its corresponding to the first end of second onunit be electrically connected, wherein second exciting unit and institute
It states the second onunit and separates setting, second exciting unit is used to adjust the on off operating mode of second onunit；
The voltage conditioning circuit is used to obtain the output voltage of the first end of first onunit and described second and is connected
The difference voltage of the output voltage of the second end of unit, the output end of the voltage conditioning circuit are used to connect with external monitoring devices
It connects, is also used to export the difference voltage to external monitoring devices.
2. battery voltage detection circuit according to claim 1, which is characterized in that first exciting unit includes first
Photophore, first onunit include the first light-receiving device, and the output end of the battery selection circuit shines with described first
The first end of device is electrically connected, the second end ground connection of first photophore, anode and first light-receiving device of the battery
Second end electrical connection, the first end of first light-receiving device are electrically connected with the first input end of the voltage conditioning circuit.
3. battery voltage detection circuit according to claim 2, which is characterized in that first photophore includes the first hair
Optical diode, the output end of the battery selection circuit are electrically connected with the anode of first light emitting diode, first hair
The cathode of optical diode is grounded, and first light-receiving device includes the first photosensitive semiconductor pipe and the first photo resistance, and described the
Base stage of one photo resistance as the first photosensitive semiconductor pipe, first photo resistance shine for incuding described first
The anode of the light of diode transmitting, the battery is electrically connected with the collector of the first photosensitive semiconductor pipe, and described first
The emitter of photosensitive semiconductor pipe is electrically connected with the first input end of the voltage conditioning circuit.
4. battery voltage detection circuit according to claim 1, which is characterized in that first exciting unit includes first
Generate heat galvanic couple, and the output end of the battery selection circuit is electrically connected with the anode of the first fever galvanic couple, first fever
The cathode of galvanic couple is grounded, and first onunit includes the first heat-sensitive semiconductive pipe and the first thermistor, and described first
Base stage of the thermistor as the first heat-sensitive semiconductive pipe, first thermistor is for incuding first heating electric
The anode of the accidental heat penetrated, the battery is electrically connected with the collector of the first heat-sensitive semiconductive pipe, first temperature-sensitive
The emitter of transistor is electrically connected with the first input end of the voltage conditioning circuit.
5. battery voltage detection circuit according to claim 1, which is characterized in that first exciting unit includes first
Pressure device, the output end of the battery selection circuit are electrically connected with the anode of the first pressure device, the first pressure device
Cathode ground connection, first onunit include the first pressure-sensitive semiconductor pipe and the first varistor, the first pressure-sensitive electricity
The base stage as the first pressure-sensitive semiconductor pipe is hindered, first varistor is used to incude what the first pressure device applied
The anode of pressure, the battery is electrically connected with the collector of the first pressure-sensitive semiconductor pipe, the first pressure-sensitive semiconductor pipe
Emitter be electrically connected with the first input end of the voltage conditioning circuit.
6. battery voltage detection circuit according to claim 1, which is characterized in that the battery selection circuit includes piece choosing
Chip and not circuit, described is selected the input terminal of chip for connecting external signal selection device, and described is selected chip
Output end is electrically connected with the input terminal of the not circuit, and the not circuit has multiple output ends, the not circuit
Each output end is electrically connected with an input terminal of the switching circuit.
7. battery voltage detection circuit according to claim 6, which is characterized in that the battery selection circuit further includes function
Rate amplification chip, the output end of the not circuit are connect with the input terminal of the power amplifier chip, the power amplification core
Piece has multiple output ends, each output end of the power amplifier chip is electrically connected with an input terminal of the switching circuit
It connects.
8. battery voltage detection circuit according to claim 1, which is characterized in that the voltage conditioning circuit includes difference
Circuit, the difference channel include the first operational amplifier, first resistor, second resistance, 3rd resistor and the 4th resistance, institute
The first end for stating the first onunit is electrically connected by the first resistor with the inverting input terminal of first operational amplifier,
The inverting input terminal of first operational amplifier also passes through the output end of the 4th resistance and first operational amplifier
Electrical connection, the homophase input that the second end of second onunit passes through the second resistance and first operational amplifier
End, the non-inverting input terminal of first operational amplifier are also grounded by the 3rd resistor.
9. battery voltage detection circuit according to claim 8, which is characterized in that the voltage conditioning circuit further includes putting
Big circuit, the amplifying circuit include second operational amplifier, the 5th resistance, the 6th resistance and the 7th resistance, and described first
The output end of operational amplifier is electrically connected by the 6th resistance with the inverting input terminal of the second operational amplifier, described
The inverting input terminal of second operational amplifier is also electrically connected by the 5th resistance and the output end of the second operational amplifier
It connects, the non-inverting input terminal of the second operational amplifier passes through the 7th resistance eutral grounding.
10. a kind of battery voltage detector, which is characterized in that including the electricity of the battery as described in any one of claim 1 to 9
Press detection circuit.
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| CN201910689811.XA CN110441699B (en) | 2019-07-29 | 2019-07-29 | Battery voltage detection circuit and battery voltage detection device |
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|---|---|---|---|
| CN201910689811.XA CN110441699B (en) | 2019-07-29 | 2019-07-29 | Battery voltage detection circuit and battery voltage detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112311057A (en) * | 2020-10-26 | 2021-02-02 | 苏州赛芯电子科技股份有限公司 | Multi-lithium battery protection system |
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| CN110441699B (en) | 2024-02-27 |
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Effective date of registration: 20200923 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Applicant before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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