CN105356587B - A kind of distribution supply unit - Google Patents
A kind of distribution supply unit Download PDFInfo
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- CN105356587B CN105356587B CN201510583304.XA CN201510583304A CN105356587B CN 105356587 B CN105356587 B CN 105356587B CN 201510583304 A CN201510583304 A CN 201510583304A CN 105356587 B CN105356587 B CN 105356587B
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Abstract
The present invention relates to a kind of distribution supply units.On the basis of being compensated to output voltage according to battery temperature, increasing battery charge/discharge control circuit makes battery charge circuit and discharge loop manage independently, realizes circulating battery charging.The charge circuit of battery and discharge loop are managed independently, it can be ensured that while controlling battery charge circuit, the discharge loop of battery is not influenced, to ensure the function of distribution power-supply system uninterrupted power supply；Battery is in storage state after disconnecting charge circuit, cycle charging changes operating mode of the battery in the most of the time, it is changed to be in storage state after being full of by long-time floating charging, it substantially increases battery life again on the basis of temperature-compensating in this way, while also ensuring the function of uninterrupted power supply.
Description
Technical field
The present invention relates to a kind of distribution supply units.
Background technology
Distribution supply unit is the core component of distribution power-supply system power supply, and input terminal voltage can be converted to power supply pair
As required suitable voltage.Since distribution power-supply system requires distribution supply unit that can have uninterrupted supply after alternating current disappearance
The function of electricity, this requires distribution power-supply systems to be equipped with energy-storage travelling wave tube, such as battery.Important set of the battery as distribution power-supply system
It is the critical component for ensureing distribution power-supply system uninterrupted power supply after alternating current disappearance at part, energy storage capacity size determines
Distribution power-supply system alternating current disappear after working time length.To ensure that the energy storage capacity of battery in distribution power-supply system can
Meet alternating current disappear after have long period work, need by battery charging voltage be arranged it is higher, in environment temperature compared with Gao Shihui
Cause battery life relatively low；If battery charging voltage setting is relatively low, battery energy storage amount can be caused not when environment temperature is relatively low
Foot.
There are following problems for existing distribution supply unit：
1, existing distribution supply unit can not carry out automation tune for variation of ambient temperature to the charging voltage of battery
Section；
2, battery is chronically at the state of floating charging in distribution power-supply system, and battery temperature can be caused higher, and the service life is shorter,
If battery be detached from charging, can not ensure alternating current disappear when uninterrupted power supply function, existing distribution supply unit without
The charge circuit of battery and discharge loop are completely independent by method realization；
3, existing distribution supply unit cannot achieve circulating battery charge control.
Invention content
The technical problem to be solved by the present invention is to：There is provided it is a kind of have automatic identification environment temperature adjust charging voltage,
The distribution supply unit of completely self-contained charge circuit and discharge loop and circulating battery charging control function.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：
A kind of distribution supply unit, including temperature-compensation circuit, battery charge/discharge control circuit and battery charge circuit control
Circuit processed；
The temperature-compensation circuit include voltage input end, thermistor, divider resistance, first singlechip, first resistor,
Second resistance, 3rd resistor, light emitting diode, optocoupler, reference voltage chip, PWM controller and voltage output end；
One end of the voltage input end and thermistor connects；The other end of the thermistor and pass through divider resistance
Ground connection；The other end of the thermistor and the signal input part of first singlechip connect；
The signal output end of the first singlechip passes through one end of 3rd resistor and first resistor, one end of second resistance
Connection；The other end of the second resistance is connected by the cathode of reference voltage chip and light emitting diode；The first resistor
The other end and light emitting diode anode connect；
The optocoupler and the input terminal of PWM controller connect；
The output end of the PWM controller is connect with voltage output end；
The battery charge/discharge control circuit include the first NMOS tube, diode, the second NMOS tube, the first sampling resistor,
Battery discharge drive module and battery charging drive module；
The grid of first NMOS tube is connect by battery discharge drive module with the source electrode of the first NMOS tube；
The drain electrode of first NMOS tube and the cathode of diode connect, drain electrode and the 2nd NMOS of first NMOS tube
The drain electrode of pipe connects；
The grid of second NMOS tube is connect by battery charging drive module with the source electrode of the second NMOS tube；
The source electrode of second NMOS tube and one end of sampling resistor connect；The other end and diode of the sampling resistor
Anode connection；
The battery charge circuit control circuit includes the second sampling resistor, third NMOS tube, amplification network module, capacitance-resistance
Network module, second singlechip, third sampling resistor and the 4th sampling resistor；
Second sampling resistor is connect with amplification network module；The source electrode of second sampling resistor and third NMOS tube
Connection；
The amplification network module is connected by the first input end of resistance-capacitance network module and second singlechip；
First output end of the second singlechip is connect with the grid of third NMOS tube；
The drain electrode of the third NMOS tube is connected by the second input terminal of third sampling resistor and second singlechip；
Second sampling resistor is connected by the second input terminal of the 4th sampling resistor and second singlechip.
The beneficial effects of the present invention are：On the basis of being compensated to output voltage according to battery temperature, increase electricity
Pond charge-discharge control circuit makes battery charge circuit and discharge loop manage independently, realizes circulating battery charging.By battery
Charge circuit and discharge loop are managed independently, it can be ensured that while controlling battery charge circuit, do not influence the electric discharge of battery
Circuit, to ensure the function of distribution power-supply system uninterrupted power supply；Battery is in storage state after disconnecting charge circuit, and cycle is filled
Electricity changes operating mode of the battery in the most of the time, is changed to be in storage state after being full of by long-time floating charging, this
Sample substantially increases battery life again on the basis of temperature-compensating, while also ensuring the function of uninterrupted power supply.
Description of the drawings
Fig. 1 is temperature-compensation circuit structural schematic diagram of the present invention；
Fig. 2 is battery charge/discharge control circuit structural schematic diagram of the present invention；
Fig. 3 is battery charge circuit control circuit structural representation of the present invention.
Specific implementation mode
To explain the technical content, the achieved purpose and the effect of the present invention in detail, below in conjunction with embodiment and coordinate attached
Figure is explained.
The design of most critical of the present invention is：Increase temperature-compensation circuit, electricity on the basis of traditional distribution supply unit
Pond charge-discharge control circuit and battery charge circuit control circuit.
A kind of distribution supply unit provided by the invention, including temperature-compensation circuit, battery charge/discharge control circuit and electricity
Pond charge circuit control circuit；
The temperature-compensation circuit include voltage input end, thermistor, divider resistance, first singlechip, first resistor,
Second resistance, 3rd resistor, light emitting diode, optocoupler, reference voltage chip, PWM controller and voltage output end；
One end of the voltage input end and thermistor connects；The other end of the thermistor and pass through divider resistance
Ground connection；The other end of the thermistor and the signal input part of first singlechip connect；
The signal output end of the first singlechip passes through one end of 3rd resistor and first resistor, one end of second resistance
Connection；The other end of the second resistance is connected by the cathode of reference voltage chip and light emitting diode；The first resistor
The other end and light emitting diode anode connect；
The optocoupler and the input terminal of PWM controller connect；
The output end of the PWM controller is connect with voltage output end；
The battery charge/discharge control circuit include the first NMOS tube, diode, the second NMOS tube, the first sampling resistor,
Battery discharge drive module and battery charging drive module；
The grid of first NMOS tube is connect by battery discharge drive module with the source electrode of the first NMOS tube；
The drain electrode of first NMOS tube and the cathode of diode connect, drain electrode and the 2nd NMOS of first NMOS tube
The drain electrode of pipe connects；
The grid of second NMOS tube is connect by battery charging drive module with the source electrode of the second NMOS tube；
The source electrode of second NMOS tube and one end of sampling resistor connect；The other end and diode of the sampling resistor
Anode connection；
The battery charge circuit control circuit includes the second sampling resistor, third NMOS tube, amplification network module, capacitance-resistance
Network module, second singlechip, third sampling resistor and the 4th sampling resistor；
Second sampling resistor is connect with amplification network module；The source electrode of second sampling resistor and third NMOS tube
Connection；
The amplification network module is connected by the first input end of resistance-capacitance network module and second singlechip；
First output end of the second singlechip is connect with the grid of third NMOS tube；
The drain electrode of the third NMOS tube is connected by the second input terminal of third sampling resistor and second singlechip；
Second sampling resistor is connected by the second input terminal of the 4th sampling resistor and second singlechip.
As can be seen from the above description, the beneficial effects of the present invention are：Output voltage is being compensated according to battery temperature
On the basis of, increasing battery charge/discharge control circuit makes battery charge circuit and discharge loop manage independently, realizes battery and follows
Ring charges.The charge circuit of battery and discharge loop are managed independently, it can be ensured that while controlling battery charge circuit, no
The discharge loop for influencing battery, to ensure the function of distribution power-supply system uninterrupted power supply；Battery is in after disconnecting charge circuit
Storage state, cycle charging change operating mode of the battery in the most of the time, are changed to after being full of by long-time floating charging
In storage state, battery life is substantially increased again on the basis of temperature-compensating in this way, while also ensuring uninterrupted confession
The function of electricity.
Further, the temperature-compensation circuit further includes filter module；The filter module includes the 4th resistance and the
One capacitance；The other end of the thermistor is connected by the 4th resistance and the signal input part of first singlechip；Described first
The signal input part of microcontroller passes through the first capacity earth.
Seen from the above description, increase filter module in temperature-compensation circuit, play filter action.
Further, further include the 8th resistance and the second capacitance；The signal output end of the first singlechip passes through the 8th
Resistance is connect with 3rd resistor；8th resistance passes through the second capacity earth.
Seen from the above description, the signal output end of the first singlechip is connect by the 8th resistance with 3rd resistor,
For 8th resistance by the second capacity earth, playing prevents high current moment impact.
Further, further include the 9th resistance and third capacitance；The 3rd resistor passes through the 9th resistance and third capacitance
One end connection；The other end of the third capacitance and the cathode of light emitting diode connect.
Seen from the above description, the 9th resistance is connected with third capacitance, and effect, which is adjustment loop, influences speed, improves output
Stability.
Further, the amplification network module includes the 5th resistance, the 6th resistance, the 7th resistance and operational amplifier；
One end of 5th resistance is grounded；The other end of 5th resistance and the reverse input end of operational amplifier connect
It connects；The other end of 5th resistance is connected by the output end of the 7th resistance and operational amplifier；
One end of 6th resistance is connect with the second sampling resistor；The other end and operational amplifier of 6th resistance
Positive input connection.
Further, the resistance-capacitance network module includes the tenth resistance and the 4th capacitance；
The output end of the operational amplifier is connected by the first input end of the tenth resistance and second singlechip；
The first input end of the second singlechip passes through the 4th capacity earth.
Fig. 1-3 is please referred to, the embodiment of the present invention one is：
A kind of distribution supply unit provided by the invention, including temperature-compensation circuit, battery charge/discharge control circuit and electricity
Pond charge circuit control circuit；
As shown in Figure 1, the temperature-compensation circuit includes voltage input end, thermistor, divider resistance, the first monolithic
Machine, first resistor, second resistance, 3rd resistor, light emitting diode, optocoupler, reference voltage chip, PWM controller and voltage are defeated
Outlet；
One end of the voltage input end and thermistor connects；The other end of the thermistor and pass through divider resistance
Ground connection；The other end of the thermistor and the signal input part of first singlechip connect；
The signal output end of the first singlechip passes through one end of 3rd resistor and first resistor, one end of second resistance
Connection；The other end of the second resistance is connected by the cathode of reference voltage chip and light emitting diode；The first resistor
The other end and light emitting diode anode connect；
The optocoupler and the input terminal of PWM controller connect；
The output end of the PWM controller is connect with voltage output end；
Specific implementation is as follows：
It should be noted that：Thermistor is RT1, divider resistance R12, first singlechip U9, and first resistor is
R27, second resistance R28,3rd resistor R41, optocoupler ISO2, reference voltage chip are U2, PWM controller U1, the
The signal input part of one microcontroller is ADC6 (the 19th pin of first singlechip), and the signal output end of first singlechip is PB2
(the 14th pin of first singlechip).
It includes mainly resistance-capacitance network, acquisition to carry out the circuit of auto thermal compensation to battery charging voltage according to environment temperature
Thermistor RT1, divider resistance R12, integrated monolithic machine U9, output divider resistance R27/R28/R41, the optocoupler of battery temperature
ISO2, reference voltage chip U2, integrated PWM Controller U1.VREF is 5V benchmark, and RT1 is with battery temperature into negative temperature coefficient
Thermistor, when battery temperature increases, RT1 resistance values reduce, and partial pressure that R12 is obtained increases, defeated after R50/C10 is filtered
Entering microcontroller U9, U9 and passes through sequential operation, the VADJ signal voltages of output can increase, and be calculated by the partial pressure of R27/R28/R41,
Divider resistance on R28 can increase, and be increased by the electric current of reference voltage chip U2, and primary side PWM controls are transmitted to by optocoupler
The 1 foot voltage reduction of device U1, U1 can be such that PWM duty cycle reduces, and output energy reduction causes output voltage VO to reduce, and realizes
Battery temperature increases, the circuit function that charging voltage reduces., whereas if battery temperature reduces, this circuit same principle is realized
Output voltage V0 is increased.
As shown in Fig. 2, the battery charge/discharge control circuit includes the first NMOS tube, diode, the second NMOS tube, first
Sampling resistor, battery discharge drive module and battery charging drive module；
The grid of first NMOS tube is connect by battery discharge drive module with the source electrode of the first NMOS tube；
The drain electrode of first NMOS tube and the cathode of diode connect, drain electrode and the 2nd NMOS of first NMOS tube
The drain electrode of pipe connects；
The grid of second NMOS tube is connect by battery charging drive module with the source electrode of the second NMOS tube；
The source electrode of second NMOS tube and one end of sampling resistor connect；The other end and diode of the sampling resistor
Anode connection；
Specific implementation is as follows：
It should be noted that：First NMOS tube is Q9, diode D14, the second NMOS tube are Q10, the first sampling resistor
For R34, battery discharge drive module and battery charging drive module；.
The control unit that battery charge circuit and discharge loop are managed independently includes mainly battery discharge NMOS tube Q9, battery
Discharge diode D14, battery charging NMOS tube Q10, battery charge sampling resistor R34.In the charge circuit of battery, electricity
The diode-built-in of tank discharge NMOS tube Q9 is connected, and battery charging NMOS tube Q10 can control the break-make of the charge circuit of battery
State.In the discharge loop of battery, the diode-built-in conducting of battery charging NMOS tube Q10, battery discharge NMOS tube Q9 can
To control the on off operating mode of the discharge loop of battery.This circuit realizes the control that battery charge circuit and discharge loop are managed independently
System.
As shown in figure 3, the battery charge circuit control circuit includes the second sampling resistor, third NMOS tube, amplification net
Network module, resistance-capacitance network module, second singlechip, third sampling resistor and the 4th sampling resistor；
Second sampling resistor is connect with amplification network module；The source electrode of second sampling resistor and third NMOS tube
Connection；
The amplification network module is connected by the first input end of resistance-capacitance network module and second singlechip；
First output end of the second singlechip is connect with the grid of third NMOS tube；
The drain electrode of the third NMOS tube is connected by the second input terminal of third sampling resistor and second singlechip；
Second sampling resistor is connected by the second input terminal of the 4th sampling resistor and second singlechip.
The amplification network module includes the 5th resistance, the 6th resistance, the 7th resistance and operational amplifier；
One end of 5th resistance is grounded；The other end of 5th resistance and the reverse input end of operational amplifier connect
It connects；The other end of 5th resistance is connected by the output end of the 7th resistance and operational amplifier；
One end of 6th resistance is connect with the second sampling resistor；The other end and operational amplifier of 6th resistance
Positive input connection.
The resistance-capacitance network module includes the tenth resistance and the 4th capacitance；
The output end of the operational amplifier is connected by the first input end of the tenth resistance and second singlechip；
The first input end of the second singlechip passes through the 4th capacity earth.
Specific implementation is as follows：
It should be noted that：Second sampling resistor is R35, third NMOS tube is Q11, and the 5th resistance is R3, the 6th resistance
For R4, the 7th resistance is R21, and operational amplifier U7-A, the tenth resistance is R73, and the 4th capacitance is C9, and second singlechip is
U10, third sampling resistor is R40 and the 4th sampling resistor is R41；
The control circuit of intelligent management battery charge circuit is mainly filled including battery charge sampling resistor R35, battery
(BO+ is R35 both end voltages, this voltage value very little is needed this voltage by electric NMOS tube Q11, amplification network R3/R4/R21/U7-A
Value by certain multiple amplify, RC network is low-pass filter, plays filter action, can filter out High-frequency Interference), resistance-capacitance network
R73/C9, integrated monolithic machine U10, sampling resistor R40/R41.When charging the battery, charging current passes through sampling resistor R35 meetings
Voltage is generated, after this voltage is by amplifying network R3/R4/R21/U7-A and capacitance-resistance filter network, inputs microcontroller U10, U10 warp
It crosses operational analysis, generates battery charge control driving CD-DRIVE and charge NMOS tube Q11 to control battery, when battery is full of,
Charging current is almost nil, is controlled by sampling, microcontroller, NMOS tube, realizes battery full of disconnection charge circuit；Sampling resistor
R40/R41 divides to obtain voltage signal B-TEST, and the difference of output voltage and cell voltage is proportional to B-TEST, voltage signal B-
TEST input microcontroller U10, operation by analysis, output CD-DRIVE control battery charge NMOS tube Q11, when cell voltage compared with
When low, it is closed charge circuit, is charged the battery.This circuit realizes the function of intelligent management battery charge circuit.
In conclusion a kind of distribution supply unit provided by the invention, is mending output voltage according to battery temperature
On the basis of repaying, increasing battery charge/discharge control circuit makes battery charge circuit and discharge loop manage independently, realizes battery
Cycle charging.The charge circuit of battery and discharge loop are managed independently, it can be ensured that while controlling battery charge circuit,
The discharge loop for not influencing battery, to ensure the function of distribution power-supply system uninterrupted power supply；After disconnection charge circuit at battery
In storage state, cycle charging changes operating mode of the battery in the most of the time, is changed to be full of by long-time floating charging
It is in storage state afterwards, substantially increases battery life again on the basis of temperature-compensating in this way, while also ensuring uninterrupted
The function of power supply.
Example the above is only the implementation of the present invention is not intended to limit the scope of the invention, every to utilize this hair
Equivalents made by bright specification and accompanying drawing content are applied directly or indirectly in relevant technical field, include similarly
In the scope of patent protection of the present invention.
Claims (6)
1. a kind of distribution supply unit, which is characterized in that filled including temperature-compensation circuit, battery charge/discharge control circuit and battery
Electrical circuit control circuit；
The temperature-compensation circuit includes voltage input end, thermistor, divider resistance, first singlechip, first resistor, second
Resistance, 3rd resistor, light emitting diode, optocoupler, reference voltage chip, PWM controller and voltage output end；
One end of the voltage input end and thermistor connects；The other end of the thermistor connects with by divider resistance
Ground；The other end of the thermistor and the signal input part of first singlechip connect；
The signal output end of the first singlechip is connected by one end of one end of 3rd resistor and first resistor, second resistance
It connects；The other end of the second resistance is connected by the cathode of reference voltage chip and light emitting diode；The first resistor
The anode of the other end and light emitting diode connects；
The optocoupler and the input terminal of PWM controller connect；
The output end of the PWM controller is connect with voltage output end；
The battery charge/discharge control circuit includes the first NMOS tube, diode, the second NMOS tube, the first sampling resistor, battery
Drive module of discharging and battery charging drive module；
The grid of first NMOS tube is connect by battery discharge drive module with the source electrode of the first NMOS tube；
The drain electrode of first NMOS tube and the cathode of diode connect, drain electrode and the second NMOS tube of first NMOS tube
Drain electrode connection；
The grid of second NMOS tube is connect by battery charging drive module with the source electrode of the second NMOS tube；
The source electrode of second NMOS tube and one end of sampling resistor connect；The other end and diode of the sampling resistor are just
Pole connects；
The battery charge circuit control circuit includes the second sampling resistor, third NMOS tube, amplification network module, resistance-capacitance network
Module, second singlechip, third sampling resistor and the 4th sampling resistor；
Second sampling resistor is connect with amplification network module；Second sampling resistor and the source electrode of third NMOS tube connect
It connects；
The amplification network module is connected by the first input end of resistance-capacitance network module and second singlechip；
First output end of the second singlechip is connect with the grid of third NMOS tube；
The drain electrode of the third NMOS tube is connected by the second input terminal of third sampling resistor and second singlechip；
Second sampling resistor is connected by the second input terminal of the 4th sampling resistor and second singlechip.
2. a kind of distribution supply unit according to claim 1, which is characterized in that the temperature-compensation circuit further includes filter
Wave module；The filter module includes the 4th resistance and the first capacitance；The other end of the thermistor by the 4th resistance with
The signal input part of first singlechip connects；The signal input part of the first singlechip passes through the first capacity earth.
3. a kind of distribution supply unit according to claim 1, which is characterized in that further include the 8th resistance and the second electricity
Hold；The signal output end of the first singlechip is connect by the 8th resistance with 3rd resistor；8th resistance passes through second
Capacity earth.
4. a kind of distribution supply unit according to claim 1, which is characterized in that further include the 9th resistance and third electricity
Hold；The 3rd resistor is connect by the 9th resistance with one end of third capacitance；The other end of the third capacitance and luminous two
The cathode of pole pipe connects.
5. a kind of distribution supply unit according to claim 1, which is characterized in that the amplification network module includes the 5th
Resistance, the 6th resistance, the 7th resistance and operational amplifier；
One end of 5th resistance is grounded；The other end of 5th resistance and the reverse input end of operational amplifier connect；
The other end of 5th resistance is connected by the output end of the 7th resistance and operational amplifier；
One end of 6th resistance is connect with the second sampling resistor；The other end and operational amplifier of 6th resistance are just
It is connected to input terminal.
6. a kind of distribution supply unit according to claim 5, which is characterized in that the resistance-capacitance network module includes the tenth
Resistance and the 4th capacitance；
The output end of the operational amplifier is connected by the first input end of the tenth resistance and second singlechip；
The first input end of the second singlechip passes through the 4th capacity earth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583304.XA CN105356587B (en) | 2015-09-14 | 2015-09-14 | A kind of distribution supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510583304.XA CN105356587B (en) | 2015-09-14 | 2015-09-14 | A kind of distribution supply unit |
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| Publication Number | Publication Date |
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| CN105356587A CN105356587A (en) | 2016-02-24 |
| CN105356587B true CN105356587B (en) | 2018-07-17 |
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| CN201510583304.XA Active CN105356587B (en) | 2015-09-14 | 2015-09-14 | A kind of distribution supply unit |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107086635B (en) * | 2017-06-02 | 2024-05-14 | 扬州市纵横光电科技有限公司 | Energy storage charge-discharge controller with double-control heating function |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202817852U (en) * | 2012-10-12 | 2013-03-20 | 广东易事特电源股份有限公司 | Charger temperature compensating circuit |
| CN203205845U (en) * | 2012-11-22 | 2013-09-18 | 无锡中星微电子有限公司 | Battery protection circuit with post-discharge overcurrent protection self-recovery function |
| CN205039619U (en) * | 2015-09-14 | 2016-02-17 | 深圳市汇业达通讯技术有限公司 | Join in marriage net power supply unit |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5217468B2 (en) * | 2008-02-01 | 2013-06-19 | 株式会社リコー | Secondary battery protecting semiconductor device, battery pack using the secondary battery protecting semiconductor device, and electronic apparatus using the battery pack |
-
2015
- 2015-09-14 CN CN201510583304.XA patent/CN105356587B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202817852U (en) * | 2012-10-12 | 2013-03-20 | 广东易事特电源股份有限公司 | Charger temperature compensating circuit |
| CN203205845U (en) * | 2012-11-22 | 2013-09-18 | 无锡中星微电子有限公司 | Battery protection circuit with post-discharge overcurrent protection self-recovery function |
| CN205039619U (en) * | 2015-09-14 | 2016-02-17 | 深圳市汇业达通讯技术有限公司 | Join in marriage net power supply unit |
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