CN108808802A - A kind of feedback net type battery discharge detection device - Google Patents
A kind of feedback net type battery discharge detection device Download PDFInfo
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- CN108808802A CN108808802A CN201810780132.9A CN201810780132A CN108808802A CN 108808802 A CN108808802 A CN 108808802A CN 201810780132 A CN201810780132 A CN 201810780132A CN 108808802 A CN108808802 A CN 108808802A
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0063—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
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- H02J2007/0067—
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- Engineering & Computer Science (AREA)
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The present invention relates to battery detecting technical field, more particularly to a kind of feedback net type battery discharge detection device；The present invention includes battery, power supply, the battery discharge feedback circuit for feeding back to for battery discharge power supply, the battery voltage detection circuit for detecting cell voltage in real time, the battery current detection circuit for detecting battery current in real time, the electric discharge for controlling battery and the constant-current discharge control circuit for limiting the pressure limiting charge/discharge control circuit of voltage, discharge current for controlling battery；In the present invention, battery discharging energy is fed back to power supply by battery discharge feedback circuit, reduce energy loss, battery voltage detection circuit detects cell voltage in real time, battery current detection circuit detects battery current in real time, and pressure limiting charge/discharge control circuit, constant-current discharge control circuit can accurately control battery and carry out electric discharge and pressure limiting according to given Current Voltage, greatly improve the quality of battery and simple in structure, performance stabilization.
Description
Technical field
The present invention relates to battery detecting technical field, more particularly to a kind of feedback net type battery discharge detection device.
Background technology
Accumulator is component part important in DC power system and communication infrastructure power-supply system, as direct current system
The backup power supply of system is responsible in the case where alternating current interrupts suddenly, continues to provide safe and stable, reliable electric power safeguard.Cause
This, accumulator can be supplied to the actual capacity of load to ensuring that the operation of equipment has highly important meaning in discharge process
Justice.
In order to accurately know the actual discharge ability of accumulator group, solve under the long-term floating charge state of accumulator group inside it at
Accumulator internal resistance caused by part solidification increases and capacity decline, it is necessary to and discharge test is carried out to accumulator, checks its discharge capacity,
This just needs a kind of device that accumulator is made to discharge according to constant electric current, and this device is referred to as Battery Discharging Device.
Currently, there are mainly two types of the discharge technologies that cell production process generally uses:One is using based on silicon-controlled
Discharge technology, this equipment property return to utility network, and electric discharge organic efficiency is low；Another kind is to use conductive discharge, is put
Electric process electric energy is all consumed in a manner of conductive discharge, and waste is big.
Invention content
It is described above in order to overcome the shortcomings of, the object of the present invention is to provide a kind of feedback net type battery discharge detection device,
Battery discharging energy is fed back to power supply by it, reduces energy loss, and can accurately control battery according to given electric current
Voltage carries out electric discharge and pressure limiting, greatly improves the quality of battery and simple in structure, performance stabilization.
The present invention the technical solution to solve the technical problem is that：
A kind of feedback net type battery discharge detection device, wherein including battery, power supply, the electricity for feeding back to for battery discharge power supply
Tank discharge feedback circuit, the battery voltage detection circuit for detecting cell voltage in real time, for detecting battery current in real time
Battery current detection circuit, the electric discharge for controlling battery and limit voltage pressure limiting charge/discharge control circuit, for controlling battery
Discharge current constant-current discharge control circuit；The battery respectively with the battery discharge feedback circuit, battery voltage detection
Circuit, battery current detection circuit electrical connection, the battery voltage detection circuit are electrically connected with the pressure limiting charge/discharge control circuit,
The battery current detection circuit is electrically connected with the constant-current discharge control circuit, the battery discharge feedback circuit respectively with institute
State power supply, pressure limiting charge/discharge control circuit, the electrical connection of constant-current discharge control circuit.
As an improvement of the present invention, the battery discharge feedback circuit includes boost chip U1, triode D3 and electricity
Feel L1；Boost chip U1 is connect with power supply, one end of inductance L1, one end of triode D3 with the 4th foot of boost chip U1,
5th foot, the connection of the 6th foot, the other end of inductance L1 are connect with battery, the other end ground connection of triode D3.
As a further improvement on the present invention, the battery voltage detection circuit includes chip B1A, resistance R26, resistance
R36, resistance RS1, resistance RS2, resistance RS3, resistance RS4 and resistance RD1；The 1st foot of chip B1A discharges with the pressure limiting respectively
One end connection of control circuit, resistance RS4, the 2nd foot of chip B1A respectively with one end of resistance RS3, the other end of resistance RS4
Connection, the 3rd foot of chip B1A are connect with one end of one end of resistance RS1, resistance RS2 respectively, the other end ground connection of resistance RS1,
The other end of resistance RS2 is connect with the anode of one end of resistance R26, one end of resistance RD1, battery respectively, and resistance RD1's is another
End ground connection, the other end of resistance R26 connect with inductance L1, the other end of resistance RS3 respectively with one end of resistance R36, battery
Cathode connects, the other end ground connection of resistance R36.
As a further improvement of the present invention, the battery current detection circuit includes resistance RM1；The one of resistance RM1
End is connect with battery, constant-current discharge control circuit respectively, the other end ground connection of resistance RM1.
As a further improvement of the present invention, the pressure limiting charge/discharge control circuit includes chip B1B, triode Q5, electricity
Hinder R29, resistance R33, external constant pressure given side B；The 5th foot of chip B1B is connect with one end of resistance R29, and resistance R29's is another
End connect with the 1st foot of chip B1A, the 6th foot of chip B1B is connect with one end of resistance R33, the other end of resistance R33 and outside
The B connections of portion constant pressure given side, the 7th foot of chip B1B are connect with one end of triode Q5, the other end of triode Q5 and the electricity
Tank discharge feedback circuit connects.
As a further improvement of the present invention, the constant-current discharge control circuit includes that chip A1, foreign current are given
Hold Vin, resistance R19, resistance R20, resistance R14, resistance R23 and capacitance C15；The 6th foot of chip A1 is returned with the battery discharge
Current feed circuit connects, and the 2nd foot of chip A1 is connect with one end of one end of resistance R20, resistance R23 respectively, the other end of resistance R23
Ground connection, the other end of resistance R20 are connect with resistance RM1；The 3rd foot of chip A1 is connect with resistance R19, resistance R19 and external electrical
Flow given side Vin connections.
As a further improvement of the present invention, the battery discharge feedback circuit further include triode Q4, resistance R10,
Resistance R11, resistance R12 and resistance R13；Power supply is connect with one end of resistance R10, and the other end of resistance R10 is with triode Q4's
Collector connects, and the base stage of triode Q4 is connect with one end of resistance R12, the other end and resistance R14, the triode of resistance R12
The emitter of Q5 connections, triode Q4 is connect with one end of resistance R11, and the other end of resistance R11 connects with one end of resistance R13
It connects, the other end of resistance R13 is connect with boost chip U1.
As a further improvement of the present invention, the pressure limiting charge/discharge control circuit further includes resistance R35 and capacitance C22,
The 7th foot of chip B1B is connect with one end of capacitance C22, and the other end of capacitance C22 is connect with one end of resistance R35, resistance R35
The other end connect with the 6th foot of chip B1B.
As a further improvement of the present invention, the battery voltage detection circuit further includes capacitance C21；Capacitance C21's
One end is connect with the 4th foot of chip B1A, the other end ground connection of capacitance C21.
As a further improvement of the present invention, the constant-current discharge control circuit further includes capacitance C11；Capacitance C11's
One end is connect with the 4th foot of chip A1, the other end ground connection of capacitance C11.
In the present invention, battery discharging energy is fed back to power supply by battery discharge feedback circuit, reduces energy loss, electricity
Cell voltage detection circuit detects cell voltage in real time, and battery current detection circuit detects battery current in real time, and pressure limiting is discharged
Control circuit, constant-current discharge control circuit can accurately control battery and carry out electric discharge and pressure limiting according to given Current Voltage,
Greatly improve the quality of battery and simple in structure, performance stabilization.
Description of the drawings
The present invention is described in detail by following preferred embodiments and attached drawing for ease of explanation,.
Fig. 1 is the connection block diagram of the present invention；
Fig. 2 is the circuit connection diagram of the present invention；
Reference numeral：1- batteries, 2- battery discharge feedback circuits, 3- battery voltage detection circuits, 4- battery current detection circuits,
5- pressure limiting charge/discharge control circuits, 6- constant-current discharge control circuits, 7- equipment power supplys.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
As depicted in figs. 1 and 2, a kind of feedback net type battery discharge detection device of the invention, including battery 1, power supply 7, use
In battery discharge feedback circuit 2, the battery voltage detection electricity for detecting cell voltage in real time that battery discharge feeds back to power supply
Road 3, the battery current detection circuit 4 for detecting battery current in real time, the electric discharge for controlling battery and the limit for limiting voltage
Press the constant-current discharge control circuit 6 of electric control circuit 5, discharge current for controlling battery.
As shown in Figure 1, battery is detected with battery discharge feedback circuit 2, battery voltage detection circuit 3, battery current respectively
Circuit 4 is electrically connected, and battery voltage detection circuit 3 is electrically connected with pressure limiting charge/discharge control circuit 5, battery current detection circuit 4 and perseverance
Banish electric control circuit 6 electrical connection, battery discharge feedback circuit 2 respectively with power supply 7, pressure limiting charge/discharge control circuit 5, constant-current discharge
Control circuit 6 is electrically connected.
In the present invention, battery discharging energy is fed back to power supply 7 by battery discharge feedback circuit 2,
Energy loss is reduced, battery voltage detection circuit 3 in real time examine in real time by detection cell voltage, battery current detection circuit 4
Battery current is surveyed, and pressure limiting charge/discharge control circuit 5, constant-current discharge control circuit 6 can accurately control battery according to given
Current Voltage carries out electric discharge and pressure limiting, greatly improves the quality of battery and simple in structure, performance stabilization.
As shown in Fig. 2, battery discharge feedback circuit includes boost chip U1, triode D3 and inductance L1；Boost chip U1
It being connect with power supply, one end of inductance L1, one end of triode D3 are connect with the 4th foot, the 5th foot, the 6th foot of boost chip U1,
The other end of inductance L1 is connect with battery, the other end ground connection of triode D3.
Further, battery voltage detection circuit includes chip B1A, resistance R26, resistance R36, resistance RS1, resistance RS2, electricity
Hinder RS3, resistance RS4 and resistance RD1；The 1st foot of chip B1A one end with the pressure limiting charge/discharge control circuit, resistance RS4 respectively
Connection, the 2nd foot of chip B1A are connect with the other end of one end of resistance RS3, resistance RS4 respectively, the 3rd foot difference of chip B1A
Connect with one end of one end of resistance RS1, resistance RS2, the other end of resistance RS1 ground connection, the other end of resistance RS2 respectively with electricity
Hinder the anode connection of one end of R26, one end of resistance RD1, battery, the other end ground connection of resistance RD1, the other end of resistance R26
It is connect with inductance L1, the other end of resistance RS3 is connect with the cathode of one end of resistance R36, battery respectively, and resistance R36's is another
End ground connection.
Further, battery current detection circuit includes resistance RM1；One end of resistance RM1 respectively with battery, constant-current discharge
Control circuit connects, the other end ground connection of resistance RM1.
Further, pressure limiting charge/discharge control circuit includes chip B1B, triode Q5, resistance R29, resistance R33, external perseverance
Press given side B；The 5th foot of chip B1B is connect with one end of resistance R29, and the other end of resistance R29 connects with the 1st foot of chip B1A
It connects, the 6th foot of chip B1B is connect with one end of resistance R33, and the other end of resistance R33 is connect with outside constant pressure given side B, core
The 7th foot of piece B1B is connect with one end of triode Q5, and the other end of triode Q5 is connect with the battery discharge feedback circuit.
Further, constant-current discharge control circuit includes chip A1, foreign current given side Vin, resistance R19, resistance
R20, resistance R14, resistance R23 and capacitance C15；The 6th foot of chip A1 is connect with the battery discharge feedback circuit, chip A1's
2nd foot is connect with one end of one end of resistance R20, resistance R23 respectively, and the other end ground connection of resistance R23, resistance R20's is another
End is connect with resistance RM1；The 3rd foot of chip A1 is connect with resistance R19, and resistance R19 is connect with foreign current given side Vin.
Further, battery discharge feedback circuit further includes triode Q4, resistance R10, resistance R11, resistance R12 and resistance
R13；Power supply is connect with one end of resistance R10, and the other end of resistance R10 is connect with the collector of triode Q4, triode Q4's
Base stage is connect with one end of resistance R12, and the other end of resistance R12 is connect with resistance R14, triode Q5, the transmitting of triode Q4
Pole is connect with one end of resistance R11, and the other end of resistance R11 is connect with one end of resistance R13, the other end and liter of resistance R13
Press chip U1 connections.
Further, pressure limiting charge/discharge control circuit further includes resistance R35 and capacitance C22, the 7th foot and capacitance of chip B1B
One end of C22 connects, and the other end of capacitance C22 is connect with one end of resistance R35, and the of the other end of resistance R35 and chip B1B
6 feet connect.
Further, battery voltage detection circuit further includes capacitance C21；One end of capacitance C21 and the 4th foot of chip B1A
Connection, the other end ground connection of capacitance C21.
Further, constant-current discharge control circuit further includes capacitance C11；One end of capacitance C11 connects with the 4th foot of chip A1
It connects, the other end ground connection of capacitance C11.
The present invention provides one embodiment, which includes battery 1, battery discharge feedback circuit 2, battery voltage detection
Circuit 3, battery current detection circuit 4, pressure limiting charge/discharge control circuit 5, constant-current discharge control circuit 6 and power supply 7；Wherein battery 1
It is linked in sequence with battery voltage detection circuit 3, pressure limiting charge/discharge control circuit 5；Battery 1 is put with battery current detection circuit 4, constant current
Electric control circuit 6 is linked in sequence；Battery 1 is linked in sequence with battery discharge feedback circuit 2, power supply 7；Battery discharge feedback circuit 2
It is connect respectively with pressure limiting charge/discharge control circuit 5, constant-current discharge control circuit 6.Battery discharge feedback circuit 2 includes boost chip U1
（Using MP3426）, inductance L1 and diode D3, wherein boost chip U16 the 4th, 5, the one end 6 feet connection inductance L1, inductance L1 is another
One end connects battery 1；Diode D3 anodes connection boost chip U16 the 4th, 5,6 feet and inductance L1；Battery voltage detection circuit 3
Including chip B1A (using 4558), resistance R26, resistance R36, resistance RS1, resistance RS2, resistance RS3, resistance RS4 and resistance
RD1；Resistance RS2 and RS1 tie point are connect with the 3rd foot of chip B1A, the 2nd foot of resistance RS3 and RS4 tie point and chip B1A
Connection.Battery current detection circuit 4 includes cement resistor RM1；The one end cement resistor RM1 is grounded, and the other end connects battery 1 simultaneously
It is connected to constant-current discharge control circuit end.Pressure limiting charge/discharge control circuit 5 includes chip B1B (also using 4558), triode Q5, electricity
Hinder R29, resistance R33 and external constant pressure given side；The one end resistance R29 connects the 1st foot of chip B1B, and the other end connects chip
The 5th foot of B1B；The one end resistance R33 connection external constant pressure given side, the other end connect the 6th foot of chip B1B；Chip B1B's
7th foot connects resistance R28, the base stage of resistance R28 connecting triodes Q5.Constant-current discharge control circuit 6 includes chip A1（Using
OP07）With foreign current given side, resistance R19, resistance R20, resistance R14, resistance R23 and capacitance C15；The one end resistance R19 connects
Foreign current given side is connect, one end connects the 3rd foot of chip A1；The one end resistance R20 connects RM1, and the other end connects chip
The 2nd foot of A1；The 2nd foot of chip A1 is linked in sequence with resistance R23, capacitance C15；The 6th foot connection resistance R14 of chip A1.
Wherein, 2 function of battery discharge feedback circuit is：DC/DC boosts, and battery discharge is fed back to power supply；Cell voltage
3 function of detection circuit is：Cell voltage is detected in real time；4 function of battery current detection circuit is：Detection battery electricity in real time
Stream；Electric 5 functions of pressure limiting control of discharge are：The electric discharge for controlling battery limits voltage；6 function of constant-current discharge control circuit is：Control
The discharge current of battery；Battery 1 is fed back to power supply 7, battery voltage detection circuit 3, electricity by inductance, chip U1 boostings, electric discharge
Pond current detection circuit 4 samples current battery level and electric current respectively, compared with given voltage electric current, to control chip U1's
The output of PWM duty cycle is controlled discharge circuit and limitation voltage.Its operation principle：First when battery discharge feedback circuit 2
After receiving external high level discharge signal, boosting is started to work, and battery 1 carries out electric discharge feedback by inductance L1, PWM boostings
To power supply 7, battery voltage detection circuit 3, battery current detection circuit 4 sample current battery level and electric current respectively at this time, with
Given voltage and current compares, and generates a control signal, the break-make of control triode Q4, to control chip U1 feedback pins FB
Voltage, make chip U1 change its export PWM duty ratio, to effectively control battery discharge current and limitation voltage.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (10)
1. a kind of feedback net type battery discharge detection device, which is characterized in that fed back to including battery, power supply, for battery discharge
The battery discharge feedback circuit of power supply, the battery voltage detection circuit for detecting cell voltage in real time detect electricity for real-time
The battery current detection circuit of pond electric current, the electric discharge for controlling battery and limit voltage pressure limiting charge/discharge control circuit, be used for
Control the constant-current discharge control circuit of the discharge current of battery；The battery respectively with the battery discharge feedback circuit, battery
Voltage detecting circuit, battery current detection circuit electrical connection, the battery voltage detection circuit and pressure limiting control of discharge electricity
Road is electrically connected, and the battery current detection circuit is electrically connected with the constant-current discharge control circuit, the battery discharge feedback electricity
Road is electrically connected with the power supply, pressure limiting charge/discharge control circuit, constant-current discharge control circuit respectively.
2. a kind of feedback net type battery discharge detection device according to claim 1, which is characterized in that the battery discharge returns
Current feed circuit includes boost chip U1, triode D3 and inductance L1；Boost chip U1 is connect with power supply, one end of inductance L1, three
One end of pole pipe D3 is connect with the 4th foot, the 5th foot, the 6th foot of boost chip U1, and the other end of inductance L1 is connect with battery, and three
The other end of pole pipe D3 is grounded.
3. a kind of feedback net type battery discharge detection device according to claim 2, which is characterized in that the cell voltage inspection
Slowdown monitoring circuit includes chip B1A, resistance R26, resistance R36, resistance RS1, resistance RS2, resistance RS3, resistance RS4 and resistance RD1；Core
The 1st foot of piece B1A is connect with one end of the pressure limiting charge/discharge control circuit, resistance RS4 respectively, the 2nd foot of chip B1A respectively with
The other end connection of one end of resistance RS3, resistance RS4, the 3rd foot of chip B1A respectively with one end of resistance RS1, resistance RS2
One end connects, the other end of resistance RS1 ground connection, the other end of resistance RS2 respectively with one end of resistance R26, resistance RD1 one
The anode connection at end, battery, the other end ground connection of resistance RD1, the other end of resistance R26 are connect with inductance L1, and resistance RS3's is another
One end is connect with the cathode of one end of resistance R36, battery respectively, the other end ground connection of resistance R36.
4. a kind of feedback net type battery discharge detection device according to claim 3, which is characterized in that the battery current inspection
Slowdown monitoring circuit includes resistance RM1；One end of resistance RM1 is connect with battery, constant-current discharge control circuit respectively, and resistance RM1's is another
End ground connection.
5. a kind of feedback net type battery discharge detection device according to claim 4, which is characterized in that the pressure limiting electric discharge control
Circuit processed includes chip B1B, triode Q5, resistance R29, resistance R33, external constant pressure given side B；The 5th foot of chip B1B and electricity
One end connection of R29 is hindered, the other end of resistance R29 is connect with the 1st foot of chip B1A, and the 6th foot of chip B1B is with resistance R33's
One end connects, and the other end of resistance R33 is connect with outside constant pressure given side B, one end of the 7th foot and triode Q5 of chip B1B
Connection, the other end of triode Q5 are connect with the battery discharge feedback circuit.
6. a kind of feedback net type battery discharge detection device according to claim 5, which is characterized in that the constant-current discharge control
Circuit processed includes chip A1, foreign current given side Vin, resistance R19, resistance R20, resistance R14, resistance R23 and capacitance C15；
The 6th foot of chip A1 is connect with the battery discharge feedback circuit, the 2nd foot of chip A1 respectively with one end of resistance R20, resistance
One end of R23 connects, and the other end ground connection of resistance R23, the other end of resistance R20 is connect with resistance RM1；The 3rd foot of chip A1
It is connect with resistance R19, resistance R19 is connect with foreign current given side Vin.
7. a kind of feedback net type battery discharge detection device according to claim 6, which is characterized in that the battery discharge returns
Current feed circuit further includes triode Q4, resistance R10, resistance R11, resistance R12 and resistance R13；One end of power supply and resistance R10 connects
It connects, the other end of resistance R10 is connect with the collector of triode Q4, and the base stage of triode Q4 is connect with one end of resistance R12, electricity
The other end of resistance R12 is connect with resistance R14, triode Q5, and the emitter of triode Q4 is connect with one end of resistance R11, resistance
The other end of R11 is connect with one end of resistance R13, and the other end of resistance R13 is connect with boost chip U1.
8. a kind of feedback net type battery discharge detection device according to claim 7, which is characterized in that the pressure limiting electric discharge control
Circuit processed further includes resistance R35 and capacitance C22, and the 7th foot of chip B1B is connect with one end of capacitance C22, and capacitance C22's is another
End is connect with one end of resistance R35, and the other end of resistance R35 is connect with the 6th foot of chip B1B.
9. a kind of feedback net type battery discharge detection device according to claim 8, which is characterized in that the cell voltage inspection
Slowdown monitoring circuit further includes capacitance C21；One end of capacitance C21 is connect with the 4th foot of chip B1A, the other end ground connection of capacitance C21.
10. a kind of feedback net type battery discharge detection device according to claim 9, which is characterized in that the constant-current discharge
Control circuit further includes capacitance C11；One end of capacitance C11 is connect with the 4th foot of chip A1, the other end ground connection of capacitance C11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780132.9A CN108808802A (en) | 2018-07-16 | 2018-07-16 | A kind of feedback net type battery discharge detection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810780132.9A CN108808802A (en) | 2018-07-16 | 2018-07-16 | A kind of feedback net type battery discharge detection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108808802A true CN108808802A (en) | 2018-11-13 |
Family
ID=64076689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810780132.9A Pending CN108808802A (en) | 2018-07-16 | 2018-07-16 | A kind of feedback net type battery discharge detection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108808802A (en) |
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2018
- 2018-07-16 CN CN201810780132.9A patent/CN108808802A/en active Pending
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