CN105513246B - Determine the stolen device of base station storage batteries group and cable, method and system - Google Patents
Determine the stolen device of base station storage batteries group and cable, method and system Download PDFInfo
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- CN105513246B CN105513246B CN201410488342.2A CN201410488342A CN105513246B CN 105513246 B CN105513246 B CN 105513246B CN 201410488342 A CN201410488342 A CN 201410488342A CN 105513246 B CN105513246 B CN 105513246B
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Abstract
The invention discloses the stolen devices of a kind of judgement base station storage batteries group and cable, method and system.The described method includes: training obtained total voltage and intermediate voltage value to be fitted to obtain one total voltage-medium voltage charging and discharging curve according to one group, wherein, the total voltage is acquired to the both ends of Switching Power Supply, and the medium voltage acquires the either end to any intermediate monitoring point of battery group to Switching Power Supply；Judge that the current total voltage obtained in real time and intermediate voltage value are formed by whether coordinate value is in except the bar-shaped zone on the basis of the total voltage-medium voltage charging and discharging curve and with a default fluctuation threshold to fluctuate bandwidth, if so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line.The present invention is simple and effective, simplifies the stolen process of software identification, and reduce hardware cost, while can also solve the problems, such as existing by measuring battery voltage to realize that antitheft existing judgement efficiency is too low and accuracy is relatively low.
Description
Technical field
The invention belongs to dynamic environment monitoring technical fields, in particular to a kind of judgement for battery monitor
The stolen device of base station storage batteries group and cable, method and system.
Background technique
Dynamic environment monitoring system is used for each independent power-equipment and building environment, computer room safety and protection monitoring to distribution
Acquisition, real-time monitoring system and the equipment, the operating status of security such as object takes remote measurement, remote signalling, record and processing related data,
Detecting failure in time, and make necessary remote control, remote regulating operation, notify personnel to handle in due course；Few people of realization computer room, unmanned value
It keeps and the Centralized Monitoring maintenance management of power supply, air-conditioning, improves the reliability of power supply system and the safety of communication equipment.
The monitoring object of dynamic environment monitoring system is divided into following a few classes: for dynamical system, including Alternating Current Power Supply
System: high and low voltage electric distribution, first cabinet of each row, UPS (Uninterruptible Power System, uninterruptible power supply), ATS
(Automatic Transfer Switching Equipment, automatic transfer switching electric appliance), diesel-driven generator, voltage-stablizer,
Inverter etc.；And DC power-supply system: rectifier power source, inverter, battery group, DC/DC converting power source, electricity behaviour's screen etc..It is right
For environmental system, comprising: temperature and humidity, water logging, liquid level, fire-fighting etc..In addition to this, dynamic environment monitoring system is also used to sky
The monitoring of the accumulation monitoring object such as tune and energy conserving system, security system, IT system.
Existing battery monitor is generally divided into three categories, first is that based on mechanical electric linkage alarm device, by the alarm
Device is mounted on battery, when there is stolen situation in battery, the electric-linked alarm device linkage alarm of Crush trigger；Two
It is direct monitoring battery voltage, by monitoring the real-time change situation of accumulator battery voltage, to determine the stolen shape of battery
State, and the triggering alarm when determining to show that stolen situation occurs in battery, third is that utilizing GPS (Global Positioning
System, global positioning system) positioning storage battery, alarm is triggered when battery is moved.
But above-mentioned existing battery anti-theft method, all have the shortcomings that it is respective, specifically:
1, battery anti-theft is carried out using mechanical electric linkage alarm device, needs to be separately provided special battery anti-theft
Cabinet, brings many not convenient to maintenance personnel, while Theft-proof cabinet is arranged, needs to carry out the existing base-station environment of operator
Modernization overlay, it is very complicated in engineering construction.
2, directly monitoring accumulator battery voltage needs to monitor battery group monomer voltage, in base to realize battery anti-theft
When battery joint number of standing is more, the technical solution wiring is complicated, is easy to make troubles to in-site installation personnel.
3, antitheft, mounting means complexity is tracked to battery using GPS module, and needs to dismantle battery, together
When need to increase additional GPS module, cost is very high.
Summary of the invention
In order to solve at least one above-mentioned technical problem, being designed to provide for the embodiment of the present invention is a kind of for electric power storage
The stolen device of the judgement base station storage batteries group and cable of cell monitoring, method and system.
The embodiment of the present invention is implemented with the following technical solutions:
A kind of device for determining base station storage batteries group and cable and being stolen, comprising:
Voltage monitoring module, any intermediate monitoring of total voltage and battery group for real-time monitoring Switching Power Supply both ends
Point arrives the medium voltage of Switching Power Supply either end, wherein the both ends of the Switching Power Supply pass through the connection of battery busbar line respectively
To the two poles of the earth of battery group；
Trained and study module, total voltage and intermediate voltage value for obtaining according to one group of training are fitted to obtain one always
Voltage-medium voltage charging and discharging curve；
Antitheft processing module, current total voltage and intermediate voltage value for judging to obtain in real time are formed by coordinate value
Whether in the item on the basis of the total voltage-medium voltage charging and discharging curve and with a default fluctuation threshold being fluctuation bandwidth
Except shape region, if so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line.
Preferably, it trains with study module and includes:
Charge-discharge control unit executes complete charge and discharge process at least once to battery for control switch power supply；
Acquiring unit, for obtaining the total voltage and intermediate voltage value that it is acquired in real time from the voltage monitoring module；
Fitting unit obtains a total electricity for being fitted according to the total voltage and intermediate voltage value obtained by training
Pressure-medium voltage charging and discharging curve.
Preferably, the bar shaped is in when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate value
Number except region is more than default decision threshold, then antitheft processing module generates the stolen alarm of battery or battery busbar line
Stolen alarm.
A method of determining that base station storage batteries group and cable are stolen, comprising:
The total voltage and intermediate voltage value obtained according to one group of training is fitted to obtain one total voltage-medium voltage charge and discharge
Curve, wherein the total voltage is acquired to the both ends of Switching Power Supply, and the medium voltage is acquired to any intermediate prison of battery group
Either end of the measuring point to Switching Power Supply；
Judge that the current total voltage obtained in real time and intermediate voltage value are formed by whether coordinate value is in described total
On the basis of voltage-medium voltage charging and discharging curve and with a default fluctuation threshold be fluctuate bandwidth bar-shaped zone except, if so,
Then generate the stolen alarm of battery or the stolen alarm of battery busbar line.
Preferably, obtained total voltage and intermediate voltage value is trained to be fitted to obtain a total voltage-centre electricity according to one group
Press charging and discharging curve the step of include:
Control switch power supply executes complete charge and discharge process at least once to battery；
Obtain the total voltage and intermediate voltage value that it is acquired in real time；
It is fitted to obtain one total voltage-medium voltage according to the total voltage and intermediate voltage value obtained by training and fill
Discharge curve.
Preferably, the bar shaped is in when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate value
Number except region is more than default decision threshold, then generates the stolen alarm of battery or the stolen alarm of battery busbar line.
A kind of system for determining base station storage batteries group and cable and being stolen, comprising:
Switching Power Supply；
Battery group, the both ends of the Switching Power Supply pass through the two poles of the earth that battery busbar line is connected to battery group respectively；
Anti-theft device, any intermediate monitoring point of total voltage and battery group for real-time monitoring Switching Power Supply both ends are arrived
The medium voltage of Switching Power Supply either end；It is further used for the total voltage obtained according to one group of training and intermediate voltage value fitting
Obtain one total voltage-medium voltage charging and discharging curve；And be further used for the current total voltage for judging to obtain in real time and in
Between voltage value be formed by coordinate value and whether be on the basis of the total voltage-medium voltage charging and discharging curve and default with one
Fluctuation threshold is except the bar-shaped zone for fluctuating bandwidth, if so, then generating, battery is stolen alarm or battery busbar line is stolen
Alarm；And
Monitoring center, for obtaining the stolen alarm of the battery or the stolen alarm of battery busbar line.
Preferably, anti-theft device trains obtained total voltage and intermediate voltage value to be fitted to obtain a total electricity according to one group
Pressure-medium voltage charging and discharging curve strategy are as follows:
Control switch power supply executes complete charge and discharge process at least once to battery；
Obtain the total voltage and intermediate voltage value that it is acquired in real time；
It is fitted to obtain one total voltage-medium voltage according to the total voltage and intermediate voltage value obtained by training and fill
Discharge curve.
Preferably, the bar shaped is in when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate value
Number except region is more than default decision threshold, then anti-theft device generates the stolen alarm of battery or battery busbar line is stolen
Alarm.
Compared with prior art, the present invention obtains total electricity by detection battery group total voltage and medium voltage and training
Pressure-medium voltage charging and discharging curve, later in practical application, by analyzing the current total voltage obtained in real time and centre
Voltage value is formed by whether coordinate value is on the basis of the total voltage-medium voltage charging and discharging curve and with a default wave
It moves except the bar-shaped zone that threshold value is fluctuation bandwidth, and generates battery when determining except the bar-shaped zone and be stolen announcement
The stolen alarm of alert or battery busbar line, it can be seen that, it is simple and effective using the present invention, simplify the stolen stream of software identification
Journey, and reduce hardware cost, while can also solve existing antitheft existing to sentence by measurement battery voltage to realize
Determine the problem that efficiency is too low and accuracy is relatively low.
Detailed description of the invention
Fig. 1 is judgement base station storage batteries group provided in an embodiment of the present invention and the system structure diagram that cable is stolen；
Fig. 2 is the charging and discharging curve being fitted in the embodiment of the present invention and its fluctuation bandwidth schematic diagram；
Fig. 3 is judgement base station storage batteries group provided in an embodiment of the present invention and the method flow schematic diagram that cable is stolen.
The realization, functional characteristics and excellent effect of the object of the invention, below in conjunction with specific embodiment and attached drawing do into
The explanation of one step.
Specific embodiment
Technical solution of the present invention is described in further detail in the following with reference to the drawings and specific embodiments, so that this
The technical staff in field can better understand the present invention and can be practiced, but illustrated embodiment is not as to limit of the invention
It is fixed.
As shown in Figure 1, the device stolen the embodiment of the invention provides a kind of judgement base station storage batteries group and cable, packet
It includes:
Voltage monitoring module 1, total voltage and any centre of battery group 3 for 2 both ends of real-time monitoring Switching Power Supply
Medium voltage of the monitoring point to 2 either end of Switching Power Supply, wherein the both ends of the Switching Power Supply 2 pass through battery busbar respectively
Line (not shown) is connected to the two poles of the earth of battery group 3；
Trained and study module 4, total voltage and intermediate voltage value for obtaining according to one group of training are fitted to obtain one
Total voltage-medium voltage charging and discharging curve；
Antitheft processing module 5, current total voltage and intermediate voltage value for judging to obtain in real time are formed by coordinate
Whether value is on the basis of the total voltage-medium voltage charging and discharging curve and is fluctuation bandwidth with a default fluctuation threshold
Except bar-shaped zone, if so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line.
In the present embodiment, voltage monitoring module 1 shares 3 collection points in collection voltages signal, is switch electricity respectively
The both ends in source 2 and any intermediate monitoring point in battery group 3, for acquire 2 both ends of Switching Power Supply total voltage U3 and
Any intermediate monitoring point of battery group 3 to 2 either end of Switching Power Supply medium voltage U1, in some other embodiments, in addition to
It acquires except above-mentioned two voltage value, also the intermediate electricity of the acquisition any intermediate monitoring point of battery group 3 to 2 other end of Switching Power Supply
U2 is pressed, the voltage value reference point acquired here is different, so the builtin voltage collecting part of voltage monitoring module 1 is adopted using isolation
The mode collection voltages of collection.
In the present embodiment, trained and study module 4 needs to obtain a charging and discharging curve by learning fitting, and being based on should
Curve realizes battery group 3 and 3 busbar line anti-theft alarm of battery group, and specifically, battery group 3 passes through complete wheel charge and discharge
Electric process, voltage monitoring module 1 total voltage and intermediate node voltage collect and record in real time in FLASH chip or
In other storage mediums, the later period is as template matching data.
When Switching Power Supply 2 is to 3 charge and discharge of battery group, the monomer voltage of battery can be with correspondingly raising and lowering.
In this change procedure, ideally, the voltage of every section single battery is not much different, thus the total voltage and
Certain linear relationship is kept between intermediate node voltage, the present invention is by counting complete charging and discharging curve, for example, at this
In embodiment, the curved line relation of intermediate voltage value and total voltage value is close approximation straight line.
After template parameter acquires and determines, needs to make collected template of charging and discharging curve and delimit fluctuation threshold model
Processing is enclosed, the setting of fluctuation threshold deviates normal voltage curve about ± 0.1V according to intermediate node voltage value under normal circumstances, i.e.,
In total voltage constant interval (x1, x2), wherein x1, x2 are the bound of total voltage variation, and charging and discharging curve is in longitudinal axis
± 0.1V constitutes a bar-shaped zone in this way.As shown in Fig. 2, coordinate diagram horizontal axis is total voltage value, the longitudinal axis is medium voltage
Value, A curve are the intermediate node voltage of record and the charging and discharging curve that total voltage is constituted.The shadow region B is alarm region.At it
In his embodiment, by adjusting the fluctuation threshold, the sensitivity of adjustment alarm may be implemented, such as adjust above-mentioned offset electricity
It presses 0.1V that can increase sensitivity by it toward small adjustment, toward big adjustment, can reduce sensitivity.
Antitheft processing module 5 judges whether the current total voltage and intermediate voltage value obtained in real time is formed by coordinate value
In the slab region on the basis of the total voltage-medium voltage charging and discharging curve and with a default fluctuation threshold being fluctuation bandwidth
Except domain, if so, then generating, battery is stolen alarm or otherwise the stolen alarm of battery busbar line is not considered as alarm,
It is without any processing at this time.For example, with reference to Fig. 1 and Fig. 2, when the coordinate points that medium voltage U1 and total voltage U3 is constituted are in such as
It when in Fig. 3 in the B of shadow region, that is, meets battery and is stolen alarm conditions, generate the stolen alarm of battery at this time.
Preferably, in the present embodiment, training includes: with study module 4
Charge-discharge control unit executes complete charge and discharge process at least once to battery for control switch power supply 2；
Acquiring unit, for obtaining the total voltage and intermediate voltage value that it is acquired in real time from the voltage monitoring module 1；
Fitting unit obtains a total electricity for being fitted according to the total voltage and intermediate voltage value obtained by training
Pressure-medium voltage charging and discharging curve.
Preferably, the bar shaped is in when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate value
Number except region is more than default decision threshold, then antitheft processing module 5 generates the stolen alarm of battery or battery busbar
The stolen alarm of line.
Correspondingly, with reference to shown in Fig. 1 and 3, the embodiment of the invention also provides a kind of judgement base station storage batteries group and cables
Stolen method, comprising:
S10, it is fitted to obtain one total voltage-medium voltage according to one group of obtained total voltage of training and intermediate voltage value and fill
Discharge curve, wherein the total voltage is acquired to the both ends of Switching Power Supply 2, and the medium voltage acquires any to battery group 3
Either end of the intermediate monitoring point to Switching Power Supply 2；
The current total voltage and intermediate voltage value that S20, judgement obtain in real time are formed by whether coordinate value is in institute
It states on the basis of total voltage-medium voltage charging and discharging curve and is except the bar-shaped zone for fluctuating bandwidth with a default fluctuation threshold,
If so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line.
Preferably, in the present embodiment, obtained total voltage and intermediate voltage value is trained to be fitted to obtain one according to one group
The step of total voltage-medium voltage charging and discharging curve includes:
S101, control switch power supply 2 execute complete charge and discharge process at least once to battery；
S102, total voltage and intermediate voltage value that it is acquired in real time are obtained；
S103, it is fitted to obtain a total voltage-centre according to the total voltage and intermediate voltage value obtained by training
Voltage charging and discharging curve.
Preferably, in the present embodiment, when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate
Number of the value except the bar-shaped zone is more than default decision threshold, then generates the stolen alarm of battery or battery busbar
The stolen alarm of line.
Correspondingly, refering to what is shown in Fig. 1, the embodiment of the invention also provides a kind of judgement base station storage batteries group and cable are stolen
System, comprising:
Switching Power Supply 2；
Battery group 3, the both ends of the Switching Power Supply 2 pass through battery busbar line respectively and are connected to the two of battery group 3
Pole；
Anti-theft device, any intermediate monitoring point of total voltage and battery group 3 for 2 both ends of real-time monitoring Switching Power Supply
To the medium voltage of 2 either end of Switching Power Supply；It is further used for the total voltage obtained according to one group of training and intermediate voltage value
Fitting obtains one total voltage-medium voltage charging and discharging curve；And be further used for the current total voltage for judging to obtain in real time with
And intermediate voltage value is formed by whether coordinate value is on the basis of the total voltage-medium voltage charging and discharging curve and with one
Default fluctuation threshold is except the bar-shaped zone for fluctuating bandwidth, if so, then generating the stolen alarm of battery or battery busbar line
Stolen alarm；And
Monitoring center, for obtaining the stolen alarm of the battery or the stolen alarm of battery busbar line.
Preferably, in the present embodiment, anti-theft device trains obtained total voltage and intermediate voltage value quasi- according to one group
Conjunction obtains the strategy of one total voltage-medium voltage charging and discharging curve are as follows:
Control switch power supply 2 executes complete charge and discharge process at least once to battery；
Obtain the total voltage and intermediate voltage value that it is acquired in real time；
It is fitted to obtain one total voltage-medium voltage according to the total voltage and intermediate voltage value obtained by training and fill
Discharge curve.
Preferably, in the present embodiment, when the current total voltage and intermediate voltage value that obtain in real time are formed by coordinate
Number of the value except the bar-shaped zone is more than default decision threshold, then anti-theft device generates the stolen alarm of battery or stores
The stolen alarm of battery busbar line.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (9)
1. a kind of device for determining base station storage batteries group and cable and being stolen characterized by comprising
Voltage monitoring module, any intermediate monitoring point of total voltage and battery group for real-time monitoring Switching Power Supply both ends are arrived
The medium voltage of Switching Power Supply either end, wherein the both ends of the Switching Power Supply pass through battery busbar line respectively and are connected to storage
The two poles of the earth of battery pack；
Trained and study module, total voltage and intermediate voltage value for obtaining according to one group of training are fitted to obtain a total electricity
Pressure-medium voltage charging and discharging curve；
Whether antitheft processing module, current total voltage and intermediate voltage value for judging to obtain in real time are formed by coordinate value
In the slab region on the basis of the total voltage-medium voltage charging and discharging curve and with a default fluctuation threshold being fluctuation bandwidth
Except domain, if so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line.
2. determining the device that base station storage batteries group and cable are stolen as described in claim 1, which is characterized in that training and study
Module includes:
Charge-discharge control unit executes complete charge and discharge process at least once to battery for control switch power supply；
Acquiring unit, for obtaining the total voltage and intermediate voltage value that it is acquired in real time from the voltage monitoring module；
Fitting unit, for being fitted to obtain a total voltage-according to the total voltage and intermediate voltage value obtained by training
Medium voltage charging and discharging curve.
3. determining the device that base station storage batteries group and cable are stolen as described in claim 1, which is characterized in that obtained when real-time
Current total voltage and intermediate voltage value to be formed by number that coordinate value is in except the bar-shaped zone be more than default to sentence
Determine threshold value, then antitheft processing module generates the stolen alarm of battery or the stolen alarm of battery busbar line.
4. a kind of method for determining base station storage batteries group and cable and being stolen characterized by comprising
The total voltage and intermediate voltage value obtained according to one group of training is fitted to obtain one total voltage-medium voltage charge and discharge song
Line, wherein the total voltage is acquired to the both ends of Switching Power Supply, and the medium voltage is acquired to any intermediate monitoring of battery group
Point arrives the either end of Switching Power Supply；
Judge that the current total voltage obtained in real time and intermediate voltage value are formed by whether coordinate value is in the total voltage-
It is except the bar-shaped zone for fluctuating bandwidth, if so, then giving birth on the basis of medium voltage charging and discharging curve and with a default fluctuation threshold
At the stolen alarm of battery or the stolen alarm of battery busbar line.
5. determining the method that base station storage batteries group and cable are stolen as claimed in claim 4, which is characterized in that according to one group of instruction
The total voltage and intermediate voltage value got is fitted the step of obtaining one total voltage-medium voltage charging and discharging curve and includes:
Control switch power supply executes complete charge and discharge process at least once to battery；
Obtain the total voltage and intermediate voltage value that it is acquired in real time；
It is fitted to obtain one total voltage-medium voltage charge and discharge according to the total voltage and intermediate voltage value obtained by training
Curve.
6. determining the method that base station storage batteries group and cable are stolen as claimed in claim 4, which is characterized in that obtained when real-time
Current total voltage and intermediate voltage value to be formed by number that coordinate value is in except the bar-shaped zone be more than default to sentence
Determine threshold value, then generates the stolen alarm of battery or the stolen alarm of battery busbar line.
7. a kind of system for determining base station storage batteries group and cable and being stolen characterized by comprising
Switching Power Supply；
Battery group, the both ends of the Switching Power Supply pass through the two poles of the earth that battery busbar line is connected to battery group respectively；
Anti-theft device, for real-time monitoring Switching Power Supply both ends any intermediate monitoring point of total voltage and battery group to switch
The medium voltage of power supply either end；The total voltage and intermediate voltage value for being further used for obtaining according to one group of training are fitted to obtain
One total voltage-medium voltage charging and discharging curve；And it is further used for the current total voltage for judging to obtain in real time and intermediate electricity
Pressure value is formed by whether coordinate value is on the basis of the total voltage-medium voltage charging and discharging curve and with a default fluctuation
Threshold value is except the bar-shaped zone for fluctuating bandwidth, if so, then generating the stolen alarm of battery or the stolen alarm of battery busbar line；
And
Monitoring center, for obtaining the stolen alarm of the battery or the stolen alarm of battery busbar line.
8. determining the stolen system of base station storage batteries group and cable as claimed in claim 7, which is characterized in that anti-theft device according to
The total voltage and intermediate voltage value obtained according to one group of training is fitted to obtain the strategy of one total voltage-medium voltage charging and discharging curve
Are as follows:
Control switch power supply executes complete charge and discharge process at least once to battery；
Obtain the total voltage and intermediate voltage value that it is acquired in real time；
It is fitted to obtain one total voltage-medium voltage charge and discharge according to the total voltage and intermediate voltage value obtained by training
Curve.
9. determining the system that base station storage batteries group and cable are stolen as claimed in claim 7, which is characterized in that obtained when real-time
Current total voltage and intermediate voltage value to be formed by number that coordinate value is in except the bar-shaped zone be more than default to sentence
Determine threshold value, then anti-theft device generates the stolen alarm of battery or the stolen alarm of battery busbar line.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410488342.2A CN105513246B (en) | 2014-09-23 | 2014-09-23 | Determine the stolen device of base station storage batteries group and cable, method and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410488342.2A CN105513246B (en) | 2014-09-23 | 2014-09-23 | Determine the stolen device of base station storage batteries group and cable, method and system |
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| CN105513246A CN105513246A (en) | 2016-04-20 |
| CN105513246B true CN105513246B (en) | 2019-07-19 |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111916851B (en) * | 2019-05-08 | 2021-11-19 | 维谛技术有限公司 | Battery anti-theft method and system |
| CN113689645A (en) * | 2020-05-18 | 2021-11-23 | 中国电信股份有限公司 | Anti-theft monitoring device, method and system for storage battery pack |
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| CN201226551Y (en) * | 2008-06-26 | 2009-04-22 | 中国移动通信集团湖南有限公司 | Anti-theft device for accumulator, base station and monitoring system |
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| CN105513246A (en) | 2016-04-20 |
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