CN206992694U - A kind of DC power system - Google Patents
A kind of DC power system Download PDFInfo
- Publication number
- CN206992694U CN206992694U CN201720728029.0U CN201720728029U CN206992694U CN 206992694 U CN206992694 U CN 206992694U CN 201720728029 U CN201720728029 U CN 201720728029U CN 206992694 U CN206992694 U CN 206992694U
- Authority
- CN
- China
- Prior art keywords
- battery
- bus
- voltage
- series
- power system
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 230000005611 electricity Effects 0.000 abstract description 10
- 230000035939 shock Effects 0.000 abstract description 2
- 230000007423 decrease Effects 0.000 description 5
- 238000011217 control strategy Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Abstract
A kind of DC power system is the utility model is related to, the DC power system includes：The battery of N+M series connection, and the negative dc bus of negative pole connection of first battery；With the one-to-one DC conversion modules of N+M battery；M+1 series control circuit, be separately positioned between the positive pole and positive direct-current bus of i-th of battery, i=N, N+1 ..., N+M；Monitor, for gathering the voltage after DC bus-bar voltage and the series connection of preceding i battery respectively, and according to the voltage after the DC bus-bar voltage and preceding i battery series connection, the break-make of M+1 series control circuit of control.Implement the technical solution of the utility model, it can be ensured that the system equipment normal operation on dc bus, make dc bus strong shock resistance, reduce the probability of dc bus dead electricity, be effectively improved the reliability of DC power system.
Description
Technical field
It the utility model is related to field of power electronics, more particularly to a kind of DC power system.
Background technology
The main function of DC power system is to be powered by dc bus for system equipment in power system, works as alternating current
When netting normal, by ac grid voltage by providing electric energy after DC conversion modules for dc bus；When AC network occurs
During power down failure, by battery by providing electric energy after DC conversion modules for dc bus.System on dc bus is set
Standby is visual plant, for ensureing power system normal operation.Assuming that impact load occurs, due to DC conversion modules
On-load is limited in one's ability, dc bus will short-time loss of power supply or DC bus-bar voltage fall in short-term too low, therefore cause system
Equipment is stopped, so as to influence the normal operation of power system.The harm of dc bus dead electricity is serious, and scope is big, is
One of DC power system accident the most serious, it is to weigh DC power system to be that whether dc bus, which can effectively avoid dead electricity,
No reliable important indicator.
Utility model content
The technical problems to be solved in the utility model is that above-mentioned for prior art can not effectively avoid dc bus
The defects of dead electricity, there is provided a kind of reliable and stable DC power system, improve the impact resistance load of DC power system
Ability.
Technical scheme is used by the utility model solves its technical problem：A kind of DC power system is constructed, including：
The battery of N+M series connection, and the negative dc bus of negative pole connection of first battery；
With the one-to-one DC conversion modules of N+M battery；
M+1 series control circuit, it is separately positioned between the positive pole and positive direct-current bus of i-th of battery, i=N, N+
1、…、N+M；
For gathering the voltage after DC bus-bar voltage and the series connection of preceding i battery respectively, and according to the dc bus
Voltage after voltage and the preceding i battery series connection, control the monitor of the break-make of M+1 series control circuit.
Preferably, the series control circuit includes switch and diode, wherein, the anode connection of the diode is corresponding
The positive pole of battery, the negative electrode of the diode connect the first end of the switch, and the second end connection of the switch is described just
Dc bus, the control terminal of the switch connect the monitor.
Preferably, the switch is D.C. contactor.
Preferably, the DC conversion modules include：
The AC port being connected with AC network；
The first DC port being connected with dc bus；
The second DC port being connected with corresponding battery by connecting-disconnecting interface.
Preferably, second DC port includes：Negative terminal, the first positive terminal and the second positive terminal, it is described
First positive terminal and the second positive terminal short circuit, moreover, the negative terminal is connected with the negative pole of the battery, institute
The positive pole that the first positive terminal is stated with the battery is connected, and second positive terminal is connected with the negative pole of next battery.
Preferably, in addition to：
X battery；
With the one-to-one DC conversion modules of X battery.
Implement the technical solution of the utility model, be previously provided with control strategy in monitor, and can be according to being detected
The terminal voltage of DC bus-bar voltage and series-connected batteries, the number of adjust automatically series-connected batteries.When going out on dc bus
Now in short-term impact load when, be that impact load is powered by series-connected batteries, and due to the ability that sparks of battery
Very strong, for impact load in short-term, the terminal voltage decline after batteries series connection is limited, it is assured that on dc bus
System equipment normal operation, make dc bus strong shock resistance, reduce the probability of dc bus dead electricity, be effectively improved straight
Flow the reliability of power-supply system.
Brief description of the drawings
In order to illustrate more clearly of the utility model embodiment, the required accompanying drawing used in being described below to embodiment
It is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the utility model, for ability
For the those of ordinary skill of domain, on the premise of not paying creative work, it can also be obtained according to these accompanying drawings other attached
Figure.In accompanying drawing：
Fig. 1 is the building-block of logic of the utility model DC power system embodiment one；
Fig. 2 is the flow chart of the control method embodiment one of the utility model DC power system；
Fig. 3 is the flow chart of step S20 embodiments one in Fig. 2.
Embodiment
Fig. 1 is the building-block of logic of the utility model DC power system embodiment one, the dc source system of the embodiment
System includes：N+M+X battery, N+M+X DC conversion modules, M+1 series control circuit and monitor U, moreover, N+
M+X DC conversion modules and N+M+X battery one-to-one corresponding, M+1 series control circuit respectively with n-th, N+1
It is individual ..., the N+M battery correspond.
In this embodiment, M take 2, N+2 battery B1, B2 ... BN, BN+1, BN+2 are sequentially connected in series, and first storage
The negative dc bus of negative pole connection of battery.Moreover, setting 3 (M+1) individual series control circuits altogether, first series control circuit is set
Put between the positive pole and positive direct-current bus of n-th battery, second series control circuit is arranged on the N+1 battery
Between positive pole and positive direct-current bus, the 3rd series control circuit is arranged on the positive pole and positive direct-current bus of the N+2 battery
Between.Specifically, each series control circuit includes a switch and a diode, moreover, the anode of respective diode
The positive pole of corresponding battery is connected, the first end of the negative electrode connection respective switch of respective diode, the second end of respective switch connects
Positive direct-current bus is connect, the control terminal of respective switch connects a monitor U output end, wherein, the effect of diode is to prevent
DC bus-bar voltage pours in down a chimney to series-connected batteries.In this embodiment, first series control circuit is by switching K1 and two poles
Pipe D1 is formed, and second series control circuit is formed by switching K2 and diode D2, and the 3rd series control circuit is by switching K3
Formed with diode D3.Furthermore it is preferred that D.C. contactor may be selected in switch K1, K2, K3.
In this embodiment, N+2 DC conversion modules Z1, Z2 ... ZN, ZN+1, ZN+2 and battery B1, B2 ... BN,
BN+1, BN+2 are corresponded, and each DC conversion modules are used to when line voltage is normal, and line voltage is converted into the
One DC voltage simultaneously provides electric energy for dc bus, and line voltage is converted into the second DC voltage and is corresponding battery
Charging, is additionally operable in line voltage exception, into the first DC voltage and is dc bus by the voltage conversion of corresponding battery
Electric energy is provided.Specifically, DC conversion modules include three groups of ports：AC port, the first DC port and the second DC port,
Moreover, it is mutually isolated on three groups of port electricals, create condition for battery series connection.Wherein, AC port and AC network phase
Even, the first DC port is connected with dc bus, and the second DC port is connected with corresponding battery by connecting-disconnecting interface.Second is straight
Flow port further comprises three terminals：The positive terminal of one negative terminal and two phase short circuits, wherein, negative terminal passes through
Protective tube is connected with the negative pole of corresponding battery, and the first positive terminal is connected with the positive pole of corresponding battery, the second positive terminal
It is connected with the negative pole of next battery.After DC conversion modules insert corresponding battery port socket, make adjacent battery structure
Into being connected in series.
In this embodiment, the voltage U1 after the voltage of dc bus, the series connection of top n battery, preceding N+1 battery string
The voltage U3 after voltage U2 and the series connection of preceding N+2 battery after connection is sent into prison after collecting unit (being not drawn into coming in figure)
Device U is controlled, so that monitor U can gather DC bus-bar voltage and voltage U1, U2, U3.Monitor U is gathering dc bus electricity respectively
Pressure and voltage U1, U2, U3 after, control 3 series control circuits break-make.Specifically, monitor U is used to judge voltage successively
U1, U2, U3 judge the electricity for meeting condition whether between the minimum operating voltage and normal working voltage that dc bus allows
Whether the quantity of pressure is more than 1, if it is not, the serial number p for meeting the battery corresponding to the voltage of condition is then obtained, and will connection
Series control circuit between the positive pole and positive direct-current bus of p-th of battery is open-minded；If so, then obtain the electricity for the condition that meets
The serial number q of battery in pressure corresponding to maximum voltage, and the positive pole and positive direct-current that are connected to q-th of battery is female
Series control circuit between line is open-minded.
Illustrate the operation principle of the DC power system below：The terminal voltage of single-unit battery is with the difference of storing electricity
Change within the specific limits, in addition, M when taking 2, is correspondingly arranged three road series control circuits, correspond to respectively n-th battery,
N+1 battery and the N+2 battery.Ordinary circumstance, when series-connected batteries are in equalizaing charge, each single-unit electric power storage
The terminal voltage in pond is higher, it is necessary to closure switch K1；When series-connected batteries are in floating charging, the terminal voltage meeting of single-unit battery
Decrease, it is necessary to closure switch K2；When series-connected batteries are discharged into close to final discharging voltage, it is necessary to closure switch
K3.When ac grid voltage is normal, ac grid voltage is straight by the first DC port of N+M+X DC conversion modules
Flow bus and electric energy is provided, while ac grid voltage is filled by the second DC port of DC conversion modules for single-unit battery
Electricity.In AC network failure, each single-unit battery is provided surely by the DC conversion modules being attached thereto for dc bus
Fixed DC voltage.Under any service condition, switch K1, K2, K3 only have one and are in closure state, when on dc bus
When there is the load capacity for the first DC port that impact load exceedes DC conversion modules in short-term, the voltage of dc bus will
It can decline.When the voltage of dc bus is less than the terminal voltage of series-connected batteries (U1 or U2 or U3), series-connected batteries will
Electric energy is provided for dc bus, it is very capable to be additionally, since sparking for battery, therefore for impact load in short-term,
The terminal voltage decline of series-connected batteries is limited, so as to ensure dc bus in the voltage range of permission, it is ensured that dc bus
The normal operation of upper system equipment.
The operation principle of the DC power system is illustrated with specific example below：
Assuming that single-unit battery tension is 12V, according to the difference of battery running status, the voltage of single-unit battery will be
Change in the range of 10.8V~14.1V.The line voltage of the AC port input single-phase alternating current 220V of DC conversion modules, direct current
The normal working voltage of bus is 220V × 1.05=231V, and dc bus allows minimum operating voltage to be 220V × 0.875=
193V.It is continuous that the output voltage range of the second DC port (battery port) of DC conversion modules is arranged to 10.8~14.1V
Adjustable, the output voltage of the first DC port of DC conversion modules is 231V.
According to control strategy automatic control switch K1, K2, K3 state, the principle that control strategy follows is monitor U：Close
Series-connected batteries terminal voltage corresponding to the switch of conjunction have to be lower than the normal working voltage 231V of dc bus, it is necessary to higher than straight
The minimum operating voltage 193V that bus allows is flowed, and meets that the series-connected batteries terminal voltage of requirement is the higher the better.
As described above, N takes 16 proper in Fig. 1, and M takes 2, sets three road series control circuits, and first
Series control circuit is made up of diode D1 and switch K1, and be arranged on the positive pole of the 16th battery and positive direct-current bus it
Between, second series control circuit is made up of diode D2 and switch K2, and be arranged on the positive pole of the 17th battery with it is honest
Between flowing bus, the 3rd series control circuit is by between diode D3 and switch K3, and being arranged on the 18th battery just
Between pole and positive direct-current bus.
When battery is in equalizaing charge, it is assumed that the voltage of single-unit battery is 14.1V, then preceding 16 section battery series connection
Voltage (voltage between the positive pole of Section 16 battery and the negative pole of Section 1 battery) U1 afterwards is 14.1V*16=
225.6V, the voltage after preceding 17 section battery series connection is (between the positive pole of Section 17 battery and the negative pole of first segment battery
Voltage) U2 is 14.1V*17=239.7V, the voltage (positive pole and first segment of Section 18 battery after preceding 18 section battery series connection
Voltage between the negative pole of battery) U3 is 14.1V*18=253.8V, only voltage U1 meets policy mandates, monitor U controls
System switch K1 closures.
When battery is in floating charging, it is assumed that single-unit battery tension is 13.5V, then after preceding 16 section battery series connection
Voltage U1 is 13.5V*16=216V, and the voltage U2 after preceding 17 section battery series connection is 13.5V*17=229.5V, and preceding 18 section stores
Voltage U3 after battery series connection is 13.5V*18=243V, and wherein voltage U1, U2 is satisfied by requiring, but U2>U1, monitor U will
Controlling switch K2 is closed.
When series-connected batteries are discharged near final voltage, it is assumed that terminal voltage 10.8V, then preceding 16 save battery string
Voltage U1 after connection is 10.8V*16=172.8V, and the voltage U2 after preceding 17 section battery series connection is 10.8V*17=183.6V,
Voltage U3 after preceding 18 section battery series connection is 10.8V*18=194.4V, and only U3 meets policy mandates, and monitor U will be controlled
Switch K3 closures.
During system normal operation, AC network is provided surely by the first DC port of DC conversion modules for dc bus
Fixed DC voltage, the output voltage of the first DC port of DC conversion modules is 231V.AC network passes through direct current simultaneously
Second DC port of modular converter be corresponding single-unit battery charging, the long-term work of single-unit battery under floating charge state,
I.e. terminal voltage is 13.5V.It can be seen from above-mentioned analysis, now monitor U is by automatic closure switch K2, i.e., single-unit battery 1~
The series-connected batteries of No. 17 compositions will be connected by diode D2, switch K2 with dc bus, after preceding 17 section battery series connection
Voltage U2 be 229.5V.Assuming that occurring impact load in short-term on dc bus, cause the DC port of DC conversion modules
When output voltage is less than 229.5V, diode D2 conductings, because sparking for battery is very capable, therefore for rushing in short-term
Hitting property load, the terminal voltage decline after preceding 17 section batteries series connection is limited, is not less than the minimum work of dc bus permission
Voltage 193V, so as to ensure the normal operation of system equipment on dc bus.
In addition, preceding 18 batteries are in series, and each battery connects a DC conversion modules by connecting-disconnecting interface.
So when system needs maintenance, a DC conversion modules are arbitrarily pulled out, series-connected batteries loop disconnects, so may be used
Ensure the security of system overhaul.
Fig. 2 is the flow chart of the control method embodiment one of the utility model DC power system, the control of the embodiment
Method includes：
S10. gather the voltage after DC bus-bar voltage and preceding i battery are connected respectively, i=N, N+1 ..., N+M, its
In, N+M battery series connection, and the negative dc bus of negative pole connection of first battery, N, M be respectively more than or equal to 1 from
So number；
S20. according to the voltage after the DC bus-bar voltage and the preceding i battery series connection, M+1 series connection control is controlled
The break-make of circuit processed, wherein, M+1 series control circuit be separately positioned on the positive pole of i-th of battery and positive direct-current bus it
Between.
In a preferred embodiment, as shown in figure 3, step S20 includes：
Minimum operating voltage that whether voltage before S21. judging successively after the series connection of i battery allows in dc bus and
Between normal working voltage；
S22. judge to meet whether the quantity of the voltage of condition is more than 1, if it is not, then performing step S23；If so, then perform
Step S24；
S23. the serial number p for meeting the battery corresponding to the voltage of condition is obtained, and p-th of battery will be connected to
Positive pole and positive direct-current bus between series control circuit it is open-minded；
S24. the serial number q of the battery corresponding to voltage maximum in the voltage for the condition that meets is obtained, and will connection
Series control circuit between the positive pole and positive direct-current bus of q-th of battery is open-minded..
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for this
For the technical staff in field, the utility model can have various modifications and variations.It is all in the spirit and principles of the utility model
Within, made it is any distort, equivalent substitution, improvement etc., should be included within right of the present utility model.
Claims (6)
- A kind of 1. DC power system, it is characterised in that including：The battery of N+M series connection, and the negative dc bus of negative pole connection of first battery；With the one-to-one DC conversion modules of N+M battery；M+1 series control circuit, it is separately positioned between the positive pole and positive direct-current bus of i-th of battery, i=N, N+ 1、…、N+M；For gathering the voltage after DC bus-bar voltage and the series connection of preceding i battery respectively, and according to the DC bus-bar voltage And the voltage after the preceding i battery series connection, the monitor of the break-make of M+1 series control circuit of control.
- 2. DC power system according to claim 1, it is characterised in that the series control circuit includes switch and two Pole pipe, wherein, the anode of the diode connects the positive pole of corresponding battery, and the negative electrode of the diode connects the switch First end, the second end of the switch connect the positive direct-current bus, and the control terminal of the switch connects the monitor.
- 3. DC power system according to claim 2, it is characterised in that the switch is D.C. contactor.
- 4. DC power system according to claim 1, it is characterised in that the DC conversion modules include：The AC port being connected with AC network；The first DC port being connected with dc bus；The second DC port being connected with corresponding battery by connecting-disconnecting interface.
- 5. DC power system according to claim 4, it is characterised in that second DC port includes：Negative pole end Son, the first positive terminal and the second positive terminal, first positive terminal and the second positive terminal short circuit, moreover, institute The negative pole that negative terminal is stated with the battery is connected, and first positive terminal is connected with the positive pole of the battery, described Second positive terminal is connected with the negative pole of next battery.
- 6. DC power system according to claim 1, it is characterised in that also include：X battery；With the one-to-one DC conversion modules of X battery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720728029.0U CN206992694U (en) | 2017-06-21 | 2017-06-21 | A kind of DC power system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720728029.0U CN206992694U (en) | 2017-06-21 | 2017-06-21 | A kind of DC power system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206992694U true CN206992694U (en) | 2018-02-09 |
Family
ID=61396866
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720728029.0U Active CN206992694U (en) | 2017-06-21 | 2017-06-21 | A kind of DC power system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206992694U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN110912112A (en) * | 2019-12-24 | 2020-03-24 | 珠海格力电器股份有限公司 | Common bus circuit and fault detection method thereof |
-
2017
- 2017-06-21 CN CN201720728029.0U patent/CN206992694U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110729809A (en) * | 2019-09-24 | 2020-01-24 | 智洋创新科技股份有限公司 | Direct-current power supply bus voltage loss automatic cross-over compensation system and method |
| CN110912112A (en) * | 2019-12-24 | 2020-03-24 | 珠海格力电器股份有限公司 | Common bus circuit and fault detection method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105914868B (en) | Super capacitor energy-storage uninterruptible power supply and its method of supplying power to based on current transformer | |
| CN104600799B (en) | A kind of series battery equalizing circuit and equalization methods | |
| CN106849343B (en) | The independently-powered switching system of communication base station wind-solar-diesel storage and power switching method | |
| CN205622303U (en) | Utilize super capacitor to realize that current transformer of uninterrupted power supply gets electric power supply circuit | |
| CN102664454B (en) | Non-floating charging type substation direct current power supply system based on iron lithium battery | |
| CN103219766B (en) | Non-floating charge lithium electricity type station DC power system | |
| CN104979853B (en) | Power transmission line sectioned insulating overhead ground wire multi-point power accessing system based on electromagnetic induction | |
| CN208638048U (en) | A kind of the automatic energy saving on-line maintenance equipment and system of electricity substation battery | |
| CN104901326A (en) | Control rod drive mechanism static power supply system and energy storage system and power supply method thereof | |
| CN207603245U (en) | A kind of battery-type electricity device for blocking fish | |
| CN206992694U (en) | A kind of DC power system | |
| CN206272312U (en) | A kind of DC power system with batteries in parallel connection module | |
| CN203326621U (en) | Non floating charge lithium battery type DC (direct current) power system used for station | |
| CN104950262A (en) | Charge-discharge test system | |
| CN203071616U (en) | Intelligent high-frequency switch direct-current power supply | |
| CN204721106U (en) | Based on the power transmission line overhead ground wire electromagnetism energy taking device of super capacitor | |
| CN109586361A (en) | A kind of lithium battery energy storage battery power supply system | |
| CN201774266U (en) | Energy-storage control system | |
| CN202353294U (en) | Off-grid power supply system | |
| CN201674256U (en) | Full-on-line storage battery pack discharge test equipment | |
| CN108718104B (en) | Automatic energy-saving on-line maintenance equipment and system for storage battery of power substation | |
| CN202550664U (en) | Direct current power supply system of non-floating charge type transformer substation based on lithium iron battery | |
| CN204481544U (en) | A kind of wireless charging device for transmission line on-line monitoring equipment | |
| CN107453466A (en) | A kind of DC power system and its control method | |
| CN204992750U (en) | Incessant friendship direct current system of communication terminal of transformer substation |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A DC power supply system Effective date of registration: 20200819 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2020980005161 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20210903 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2020980005161 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A DC power supply system Effective date of registration: 20210908 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2021980009059 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20221020 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2021980009059 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A DC power supply system Effective date of registration: 20221031 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2022980020130 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20231102 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2022980020130 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A DC power supply system Effective date of registration: 20231107 Granted publication date: 20180209 Pledgee: Shenzhen hi tech investment small loan Co.,Ltd. Pledgor: SHENZHEN AUTO ELECTRIC POWER PLANT Co.,Ltd. Registration number: Y2023980064608 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |