CN207234451U - A kind of online charge and discharge control of storage battery and capacity check system - Google Patents
A kind of online charge and discharge control of storage battery and capacity check system Download PDFInfo
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- CN207234451U CN207234451U CN201721123656.8U CN201721123656U CN207234451U CN 207234451 U CN207234451 U CN 207234451U CN 201721123656 U CN201721123656 U CN 201721123656U CN 207234451 U CN207234451 U CN 207234451U
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Abstract
It the utility model is related to a kind of online charge and discharge control of storage battery and capacity check system, including rectifier, control module, the first mutual inductor, the second mutual inductor, storage battery and load；Wherein, load both ends are connected with storage battery both ends respectively, form major loop；Control module is connected with rectifier, for adjusting the output voltage and output power of rectifier, and meanwhile it is in parallel with storage battery both control module and rectifier, with load in series；First and second mutual inductor is connected with storage battery and load respectively, gathers the current value of storage battery and load respectively, the current value collected is sent to control module.The utility model adjusts the output voltage and output power of rectifier by control module, realizes storage battery constant current charge-discharge；It can guarantee that during battery discharging any exception occur, load all possesses continual power output；Cost of discharging is lower, operates safety and reliability.
Description
Technical field
The utility model is related to the technical field of straight-flow system, more particularly to a kind of online charge and discharge control of storage battery and
Capacity check system.
Background technology
Battery service is always the emphasis and difficult point of straight-flow system maintenance work, the dead electricity thing triggered by accumulator failure
Therefore or communication disruption accident it is very much.Due to the complexity and invisibility of internal storage battery performance, up to the present, except electric discharge
Test is outer, it is difficult to there is another method to carry out comprehensively qualitative, quantitative test to the performance of storage battery.By current storage battery
The service regulations regulation of group, must carry out storage battery group the electric discharge of verification property for every 1 year or 2 years, using nominal capacity 0.1A electric currents
Discharge, examine whether its capacity reaches more than the 80% of nominal capacity, each core, which holds operation, needs tens hours, work
Great work intensity, work efficiency are low.
The core of traditional storage battery holds test generally using offline method, it is necessary to which discharge equipment is transported to scene into pedestrian
Work is discharged, and in the case of there was only a group storage battery group, it is also necessary to using standby battery group, the cost of labor of offline core appearance
Higher, according to fictitious load Electrical Discharge Machine, there are huge heat source in computer room, there are security risk.
As the degree of automation increasingly improves the increase with unattended operation transformer station or base station number, traditional maintaining method
Insufficient increasingly prominent, the method that many researchers propose the online volume tests of storage battery group.Online volume test is broadly divided into
Two kinds：One kind is discharged by long-range switch discharges machine, and this method is often larger to the change of existing straight-flow system, real
It is ready-made higher, and during communication abnormality may due to can not switchback in time it is original connection and cause dead electricity accident；Another kind is logical
Crossing remote control charger reduces output voltage, storage battery is discharged load, right by the integral operation of discharge current
The capacity of storage battery is estimated.Such a method battery discharging electric current is not steady state value, can not meet to check in O＆M code
Property electric discharge require to carry out the requirement of constant-current discharge with 0.1C；And it is more demanding to the sampling precision of electric current during progress volume calculation,
The estimated value of discharge capacity is it is possible that larger error；In addition, the method is not controlled the charging process of storage battery,
Pressure drop is larger after the completion of battery discharging, if directly recover rectifier charge, it will occur large current charge make it is whole
Stream device charge protection inactivity exports and causes Loss of power failure.The above problem, it would be highly desirable to solve.
The content of the invention
The purpose of the utility model is to overcome the deficiencies in the prior art, there is provided one kind can solve the electric discharge of maintenance personnel scene
Safeguard that time-consuming and laborious, other are line electric discharge cost of implementation is high, need manual intervention charging after battery discharging, manually reduces rectification
Device, which exports, causes storage battery not enough can not ensure to fill to this volume calculation precision brought of verification capacity mode of load discharge
The online charge and discharge control of storage battery and capacity check system of the problems such as discharge process security.
To achieve the above object, technical solution provided by the utility model is：
A kind of online charge and discharge control of storage battery and capacity check system, including rectifier, control module, the first mutual inductance
Device, the second mutual inductor, storage battery and load；Wherein, load both ends are connected with storage battery both ends respectively, form major loop；Control
Molding block is connected with rectifier, for adjusting the output voltage and output power of rectifier, while control module and rectifier two
Person is in parallel with storage battery, with load in series；First and second mutual inductor is connected with storage battery and load respectively, gathers storage battery respectively
With the current value of load, the current value collected is sent to control module.
Further, the control module include communication unit, foreign current collecting unit and respectively with communication unit
The CPU connected with foreign current collecting unit；Wherein, control module is communicated to connect by the communication unit and rectifier；It is exterior
Current acquisition unit is connected with first and second mutual inductor, and the current signal that first and second mutual inductor detects is sent to CPU, for control
Rectifier voltage and power output processed provide data foundation.
As another preferred solution of the utility model, the control module includes CPU, the outside being connected with CPU
Current acquisition unit, pwm control circuit, the drive circuit for connecting pwm control circuit and CPU, the connection CPU, which are used to gather, to be controlled
The input voltage and input current collecting unit of molding block input voltage and input current information and for acquisition control module output voltage electric current
The output voltage current acquisition unit of information；The CPU controls the duty of the PWM outputs of pwm control circuit by drive circuit
Than the output power of auto-adjustment control module；Rectifier and control module series connection.
As another preferred solution of the utility model, system further includes single rectification module；Single rectification module
It is in parallel with rectifier after connecting with control module.
Compared with prior art, it is as follows the advantages of this programme：
1. compared with the mode of conventional offline electric discharge, realize online electric discharge verification capacity, manual maintenance can be mitigated significantly
Workload, adapts to the developing direction of automation.
2. compared with the mode of switch discharges equipment, using the original load of straight-flow system as discharge equipment, do not increase
Discharge module, reduces improvement cost, increases the security of O＆M process.
3. with it is existing turn down the mode of switch power source output voltage compared with, pass through control module adjust rectifier output
Voltage and output power, realize storage battery constant-current discharge, improve the precision of volume test.
4. the charging process after the completion of pair battery discharging is managed, rectifier output electricity is intelligently adjusted after the completion of electric discharge
Pressure steps up, and avoids heavy current impact from rectifier charge protection is occurred and stops exporting.
Brief description of the drawings
Fig. 1 is the functional block diagram of Traditional DC system；
Fig. 2 is the functional block diagram of the online charge and discharge control of storage battery and capacity check system in the utility model；
Fig. 3 is the system block diagram of the first embodiment in the utility model embodiment；
Fig. 4 is the structure diagram of control module in the utility model the first embodiment；
Fig. 5 is the system block diagram of second of embodiment in the utility model embodiment；
Fig. 6 is the system block diagram of the third embodiment in the utility model embodiment.
Embodiment
With reference to three specific embodiments, the utility model is described in further detail：
Embodiment one：Referring to shown in attached drawing 2 to 4, a kind of online charge and discharge control of storage battery and appearance described in the present embodiment
Measure check system, including rectifier 1, control module 2, the first mutual inductor 3, the second mutual inductor 4, storage battery 5 and load 6；It is whole
Stream device 1 includes N number of rectification module, communication interface and master control borad；Control module 2 includes communication unit 2-2, foreign current
The collecting unit 2-3 and CPU2-1 being connected respectively with communication unit 2-2 and foreign current collecting unit 2-3；
Wherein, 6 both ends of load are connected with 5 both ends of storage battery respectively, form major loop；Control module 2 passes through communication unit
2-2 is communicated to connect with rectifier 1, for adjusting the output voltage and output power of rectifier 1, while control module 2 and rectification
Both devices 1 are in parallel with storage battery 5, connect with load 6；First and second mutual inductor 3,4 is connected with storage battery 5 and load 6 respectively, point
Cai Ji not storage battery 5 and the current signal of load 6；Foreign current collecting unit 2-3 is connected with first and second mutual inductor 3,4, will
The current signal that first and second mutual inductor 3,4 detects is sent to CPU2-1, and 1 voltage of rectifier and power output provide in order to control
Data foundation.
During work, control module 2 adjusts the output voltage and output power of rectifier 1, makes storage battery 5 in discharge process defeated
Go out constant current, make the sum of the output current A of the output current D of rectifier 1, the output current B of control module 2 and storage battery 5
Equal to 6 total current C of load；Make in charging process storage battery 5 with constant current charge.
Specific control process is as follows：
Using 5 constant-current discharge current value of storage battery as electric discharge reference value, when control module 2 detects that 5 electric current B of storage battery is more than
During reference value of discharging, control module 2 is connected by communication unit 2-2 with rectifier 1, and rise rectifier 1 is adjusted by CPU2-1
Output voltage, so that 5 discharge current of storage battery diminishes.Conversely, when control module 2 detects that 5 electric current B of storage battery is less than electric discharge
During reference value, control module 2, which is adjusted, reduces by 1 output voltage of rectifier, so as to increase the discharge current of storage battery 5, realizes electric power storage
5 constant-current discharge of pond.
Enter charging control process after the completion of electric discharge, using 5 constant-current charge current value of storage battery as charging reference value, work as control
When module 2 detects that 5 electric current B of storage battery is more than charging reference value, control module 2 is connected by communication unit 2-2 with rectifier,
Adjusting reduces by 1 output voltage of rectifier, so that 5 charging current of storage battery diminishes.Conversely, when control module 2 detects electric power storage
When 5 electric current B of pond is less than reference value, control module 2 adjusts rise 1 output voltage of rectifier, so as to increase the charging electricity of storage battery 5
Stream, realizes the constant-current charge of storage battery 5.
In actual use, the degree of regulation of 5 constant current charge-discharge of storage battery is related with the adjusting step-length of 1 voltage of rectifier, when
When being transformed based on existing straight-flow system, the adjusting step-length of rectifier 1 is smaller, and 5 constant current charge-discharge precision of storage battery is higher.
Embodiment two：Referring to shown in attached drawing 2 and Fig. 5, its with embodiment one difference lies in：Control module 2 include CPU2-1,
The foreign current collecting unit 2-3 that is connected with CPU2-1, pwm control circuit 2-4, connection pwm control circuit 2-4 and CPU2-1
The input voltage and input current that drive circuit 2-5, the connection CPU2-1 are used for 2 input voltage and input current information of acquisition control module gathers
The unit 2-6 and output voltage current acquisition unit 2-7 for 2 output voltage current information of acquisition control module；Rectifier 1
Dc bus is accessed after connecting with control module 2, the output of rectifier 1 is set in storage battery floating charge state, passes through control module
Pwm control circuit, using the PWM control technologies of closed loop, realize the constant current charge-discharge of storage battery 5.
Specific control process is as follows：
Using the constant discharge current value of storage battery 5 set as electric discharge reference value, when control module 2 detects storage battery 5
Discharge current when being more than electric discharge reference value, the duty cycle rise of control pwm control circuit 2-4 output, exports control module 2
Voltage on to dc bus becomes larger, so as to reduce the electric current of the electric discharge of storage battery 5；Conversely, when the discharge current of storage battery 5 is less than
During reference value, the duty cycle of control pwm control circuit 2-4 outputs reduces, and control module 2 is output to the voltage on dc bus
Reduce, increase the discharge current of storage battery 5, realize the constant-current discharge of storage battery 5.
Enter charging control process after the completion of electric discharge, using 5 constant-current charge current value of storage battery as charging reference value, work as control
When module 2 detects that the charging current of storage battery 5 is more than charging reference value, the duty cycle drop of control pwm control circuit 2-4 outputs
It is low, reduce the voltage that control module 2 is output on dc bus, so as to reduce the electric current of the charging of storage battery 5；Conversely, when storage
When the charging current of battery 5 is less than reference value, the duty cycle rise of control pwm control circuit 2-4 outputs, makes control module 2 defeated
Go out the voltage rise onto dc bus, increase the charging current of storage battery 5, realize the constant-current charge of storage battery 5.
In actual use, to realize the high accuracy of 5 constant current charge-discharge of storage battery, it is necessary to PWM control precision it is higher, it is necessary to
Speed using the PWM controller for possessing 12 or the above, while CPU2-1 is also that storage battery constant current charge-discharge is safe and reliable
An important factor for control.The CPU2-1 speeds of service are high, it is ensured that the closed-loop control of fast speed, allows 5 discharge and recharge of storage battery
Electric current is in highly stable state.
Embodiment three：Referring to shown in attached drawing 2 and Fig. 6, its with embodiment two difference lies in：System further includes single rectification mould
Block 7；The single rectification module 7 and control module 2 access dc bus in parallel with rectifier 1 after connecting.In discharge process, load
6 electric current C are equal to the sum of 5 discharge current A of 2 output current B of control module, 1 output current D of rectifier and storage battery；Charging process
In, the sum of 2 output current B of 1 output current D of rectifier and control module is equal to the charging current A and load current C of storage battery 5
The sum of.
Control module 2 makes the output voltage of rectifier 1 be slightly larger than 5 discharge cut-off voltage of storage battery by communication unit 2-2,
Even if there is any exception in discharge process in storage battery 5, also can proof load 6 possess continual power output, ensure
The security of straight-flow system.
In discharge process, 6 electric current C of load can progressively be increased with the reduction of storage battery power supply voltage, and storage battery 5 is put
Electric current A will be constantly in steady state, its core is that the control of the output voltage of control module 2 is controlled using the PWM of closed loop
Technology processed, realizes the constant-current discharge of storage battery 5.Its charge and discharge control process is similar to the above, repeats no more.
The examples of implementation of the above are only the preferred embodiment of the utility model, not limit the utility model with this
Practical range, therefore the change that all shape, principles according to the utility model are made, should all cover in the scope of protection of the utility model
It is interior.
Claims (4)
1. a kind of online charge and discharge control of storage battery and capacity check system, including rectifier (1), the first mutual inductor (3), second
Mutual inductor (4), storage battery (5) and load (6)；It is characterized in that：Further include control module (2)；Wherein, (6) both ends are loaded
It is connected respectively with storage battery (5) both ends, forms major loop；Control module (2) and rectifier (1) connection, for adjusting rectifier
(1) output voltage and output power, at the same it is in parallel with storage battery (5) both control module (2) and rectifier (1), with load
(6) connect；First and second mutual inductor (3,4) is connected with storage battery (5) and load (6) respectively, is gathered storage battery (5) respectively and is born
The current signal of (6) is carried, the current signal collected is sent to control module (2).
2. a kind of online charge and discharge control of storage battery according to claim 1 and capacity check system, it is characterised in that：Institute
State control module (2) include communication unit (2-2), foreign current collecting unit (2-3) and respectively with communication unit (2-2) and
The CPU (2-1) of foreign current collecting unit (2-3) connection；Wherein, control module (2) passes through the communication unit (2-2) and rectification
Device (1) communicates to connect；Foreign current collecting unit (2-3) is connected with first and second mutual inductor (3,4), by first and second mutual inductor
The current signal that (3,4) detect is sent to CPU (2-1), in order to control rectifier (1) voltage and power output provide data according to
According to.
3. a kind of online charge and discharge control of storage battery according to claim 1 and capacity check system, it is characterised in that：Institute
State foreign current collecting unit (2-3), pwm control circuit that control module (2) includes CPU (2-1), is connected with CPU (2-1)
(2-4), the drive circuit (2-5) for connecting pwm control circuit (2-4) and CPU (2-1), be connected the CPU (2-1) for gathering
The input voltage and input current collecting unit (2-6) of control module (2) input voltage and input current information and for acquisition control module (2)
The output voltage current acquisition unit (2-7) of output voltage current information；The CPU (2-1) is controlled by drive circuit (2-5)
The duty cycle of the PWM outputs of pwm control circuit (2-4), the output power of auto-adjustment control module (2)；Rectifier (1) and control
Molding block (2) is connected.
4. a kind of online charge and discharge control of storage battery according to claim 1 and capacity check system, it is characterised in that：Also
Including single rectification module (7)；It is in parallel with rectifier (1) after the single rectification module (7) and control module (2) series connection.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109065975A (en) * | 2018-07-12 | 2018-12-21 | 国网四川省电力公司阿坝供电公司 | A kind of direct current system management system and its control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109065975A (en) * | 2018-07-12 | 2018-12-21 | 国网四川省电力公司阿坝供电公司 | A kind of direct current system management system and its control method |
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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 |
Denomination of utility model: A battery online charge discharge control and capacity check system Effective date of registration: 20201016 Granted publication date: 20180413 Pledgee: Bank of China Limited Dongshan Branch of Guangzhou Pledgor: GUANGZHOU HONGHUAI ENERGY TECHNOLOGY Co.,Ltd. Registration number: Y2020440000308 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |