CN107359676A - A kind of online charge and discharge control of battery and capacity check system and method - Google Patents

A kind of online charge and discharge control of battery and capacity check system and method Download PDF

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Publication number
CN107359676A
CN107359676A CN201710785530.5A CN201710785530A CN107359676A CN 107359676 A CN107359676 A CN 107359676A CN 201710785530 A CN201710785530 A CN 201710785530A CN 107359676 A CN107359676 A CN 107359676A
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CN
China
Prior art keywords
battery
current
control
discharge
rectifier
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.)
Pending
Application number
CN201710785530.5A
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Chinese (zh)
Inventor
张丹
黄尚南
黄锦燕
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Guangzhou Hong Huai Energy Science Co Ltd
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Guangzhou Hong Huai Energy Science Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
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Priority to CN201710785530.5A priority Critical patent/CN107359676A/en
Publication of CN107359676A publication Critical patent/CN107359676A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0013Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery

Abstract

The present invention relates to a kind of online charge and discharge control of battery and capacity check system and method, system includes rectifier, control module, the first transformer, the second transformer, battery and load;Wherein, load both ends are connected with battery both ends respectively, form major loop;Control module connects with rectifier, for adjusting the output voltage and power output of rectifier, and meanwhile it is in parallel with battery both control module and rectifier, with load in series;First and second transformer connects with battery and load respectively, gathers the current value of battery and load respectively, the current value collected is sent into control module.The present invention adjusts the output voltage and power output of rectifier by control module, realizes 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

A kind of online charge and discharge control of battery and capacity check system and method
Technical field
The present invention relates to the technical field of straight-flow system, more particularly to a kind of online charge and discharge control of battery and capacity Check system and method.
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 a lot.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 battery.By current battery Batteries must be carried out the electric discharge of verification property for every 1 year or 2 years, using nominal capacity 0.1A electric currents by the service regulations regulation of group Discharged, examine whether its capacity reaches more than the 80% of nominal capacity, each core, which holds operation, needs tens hours, work Working strength is big, and operating efficiency is low.
The core of traditional battery holds test and generally enters pedestrian, it is necessary to which discharge equipment is transported into scene using offline method 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 It is higher, according to fictitious load Electrical Discharge Machine, huge thermal source in computer room be present, potential safety hazard be present.
As automaticity increasingly improves the increase with unattended operation transformer station or base station number, traditional maintaining method Deficiency increasingly highlight, the method that many researchers propose the online volume tests of batteries.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, battery is discharged load, right by the integral operation of discharge current The capacity of 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 higher is required to the sampling precision of electric current when carrying out volume calculation, The estimated value of discharge capacity is it is possible that larger error;In addition, the method is not controlled to the charging process of battery, Pressure drop is larger after the completion of battery discharging, if directly recover rectifier charged, it will occur large current charge make it is whole Stream device charge protection inactivity exports and causes Loss of power failure.Above mentioned problem, it would be highly desirable to solve.
The content of the invention
Can solve the electric discharge of attendant scene it is an object of the invention to overcome the deficiencies of the prior art and provide one kind to safeguard Waste time and energy, other need manual intervention charging, artificial reduction rectifier defeated after line electric discharge cost of implementation height, battery discharging The volume calculation precision for going out to cause battery to be brought to this verification capacity mode of load discharge not enough can not ensure discharge and recharge The online charge and discharge control of battery and capacity check system of the problems such as process safety.
To achieve the above object, technical scheme provided by the present invention is:
A kind of online charge and discharge control of battery and capacity check system, including rectifier, control module, the first mutual inductance Device, the second transformer, battery and load;Wherein, load both ends are connected with battery both ends respectively, form major loop;Control Molding block connects with rectifier, for adjusting the output voltage and power output of rectifier, while control module and rectifier two Person is in parallel with battery, with load in series;First and second transformer connects with battery and load respectively, gathers 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 outside Current acquisition unit is connected with first and second transformer, and the current signal that first and second transformer detects is sent into CPU, for control Rectifier voltage and power output processed provide data foundation.
As another preferred scheme of the present invention, the control module includes CPU, the foreign current being connected with CPU Collecting unit, pwm control circuit, the drive circuit for connecting pwm control circuit and CPU, the connection CPU are used for acquisition control mould The input voltage and input current collecting unit of block input voltage and input current information and for acquisition control module output voltage current information Output voltage current acquisition unit;The CPU controls the dutycycle of the PWM outputs of pwm control circuit by drive circuit, from The power output of dynamic adjustment control module;Rectifier and control module series connection.
As another preferred scheme of the present invention, system also includes single rectification module;Single rectification module and control It is in parallel with rectifier after block coupled in series processed.
To achieve the above object, the present invention additionally provides a kind of online charge and discharge control of battery and capacity checking method, Method is:In accumulator charging/discharging process, the CPU in control module sends control instruction by communication unit, adjusts rectification The output voltage and power output of device, battery during electric discharge is exported constant current, and meet the output current of rectifier, control The output current of molding block and the output current sum of battery are equal to load total current;Fill battery constant current during charging Electricity.
Data that the output voltage and output power value of the rectifier are provided by first and second transformer are adjusted;Regulation When, foreign current collecting unit receives the current data that first and second transformer collects, and is sent the data to after receiving data CPU is as processing foundation.
When discharging startup, the output voltage for adjusting rectifier is slightly above the discharge cut-off voltage of battery, opens electric discharge It is dynamic, and ensure that rectifier can be seamless to load output power during battery exception;After the completion of electric discharge, rectifier output voltage is adjusted Step up, avoid heavy current impact from rectifier charge protection is occurred and stop exporting.
When rectifier voltage regulation step-length can not meet the requirement that storage battery constant-current discharge accurately controls, CPU leads to The dutycycle of the PWM outputs of overdrive circuit control pwm control circuit, the power output of auto-adjustment control module;The regulation The output voltage current data for the control module that the output power value of control module is collected by output voltage current acquisition unit Depending on.
As a modification of the present invention, system also includes single rectification module;The single rectification module and control module It is in parallel with rectifier after series connection.Control module adjusts the output electricity of the single rectification module using the PWM control technologies of closed loop Pressure and power output;The rectifier voltage is controlled slightly larger than the discharge cut-off voltage of battery by communication unit.
Based on above-mentioned implementation method, in discharge process, when the first transformer detects that the discharge current of battery becomes big, Control module control rectifier output voltage becomes big, so as to reduce battery discharging electric current;When the first transformer detects electric power storage The discharge current in pond becomes hour, and control module control rectifier output voltage reduces, real so as to increase the discharge current of battery The constant-current discharge of existing battery.
Based on above-mentioned implementation method, in charging process, when the first transformer detects that the charging current of battery becomes big, Control module control rectifier output voltage reduces, so as to reduce battery charging current;When the first transformer detects electric power storage The charging current in pond becomes hour, and control module control rectifier output voltage rise is real so as to increase the charging current of battery The constant-current charge of existing battery.
Based on implementation above method, described control module is additionally operable to straight-flow system operation conditions such as charged state, electric discharge The judgement of state, floating charging operation state etc..
Based on above-mentioned implementation method, the end condition of online discharge process is less than predetermined voltage protection for battery tension Value, discharge time reach test time, monomer voltage less than predetermined monomer voltage protection value, system exception alarm, hand Dynamic control stops any of discharge operation.
Compared with prior art, it is as follows the advantages of this programme:
1. compared with the mode of conventional offline electric discharge, online electric discharge verification capacity is realized, manual maintenance can be mitigated significantly Workload, adapt 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, improvement cost is reduced, increase 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 power output, 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, Intelligent adjustment rectifier output electricity 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 theory diagram of Traditional DC system;
Fig. 2 is the theory diagram of the online charge and discharge control of battery and capacity check system in the present invention;
Fig. 3 is the system block diagram of the first embodiment in the embodiment of the present invention;
Fig. 4 is the structured flowchart of control module in the first embodiment of the invention;
Fig. 5 is the system block diagram of second of embodiment in the embodiment of the present invention;
Fig. 6 is the system block diagram of the third embodiment in the embodiment of the present invention.
Embodiment
With reference to three specific embodiments, the invention will be further described:
Embodiment one:Referring to shown in accompanying drawing 2 to 4, a kind of online charge and discharge control of battery and appearance described in the present embodiment Measure check system, including rectifier 1, control module 2, the first transformer 3, the second transformer 4, 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 the both ends of battery 5 respectively, form major loop;Control module 2 passes through communication unit 2-2 communicates to connect with rectifier 1, for adjusting the output voltage and power output of rectifier 1, while control module 2 and rectification Both devices 1 are in parallel with battery 5, connected with load 6;First and second transformer 3,4 is connected with battery 5 and load 6 respectively, point Cai Ji not battery 5 and the current signal of load 6;Foreign current collecting unit 2-3 is connected with first and second transformer 3,4, will The current signal that first and second transformer 3,4 detects is sent to CPU2-1, is provided for the control voltage of rectifier 1 and power output Data foundation.
During work, control module 2 adjusts the output voltage and power output of rectifier 1, makes battery 5 in discharge process defeated Go out constant current, make the output current D of rectifier 1, the output current B of control module 2 and battery 5 output current A sums Equal to 6 total current C of load;Make in charging process battery 5 with constant current charge.
Specific control process is as follows:
Using the constant-current discharge current value of battery 5 as electric discharge reference value, when control module 2 detects that the electric current B of battery 5 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 the discharge current of battery 5 diminishes.Conversely, when control module 2 detects that the electric current B of battery 5 is less than electric discharge During reference value, the regulation of control module 2 reduces the output voltage of rectifier 1, so as to increase the discharge current of battery 5, realizes electric power storage The constant-current discharge of pond 5.
Enter charging control process after the completion of electric discharge, using the constant-current charge current value of battery 5 as charging reference value, work as control When module 2 detects that the electric current B of battery 5 is more than charging reference value, control module 2 is connected by communication unit 2-2 with rectifier, Regulation reduces the output voltage of rectifier 1, so that the charging current of battery 5 diminishes.Conversely, when control module 2 detects electric power storage When the electric current B of pond 5 is less than reference value, the regulation rise output voltage of rectifier 1 of control module 2, so as to increase the charging of battery 5 electricity Stream, realize the constant-current charge of battery 5.
In actual use, the degree of regulation of the constant current charge-discharge of battery 5 is relevant with the regulation step-length of the voltage of rectifier 1, when When being transformed based on existing straight-flow system, the regulation step-length of rectifier 1 is smaller, and the constant current charge-discharge precision of battery 5 is higher.
Embodiment two:Referring to shown in accompanying drawing 2 and Fig. 5, it is with the difference of embodiment one: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 the input voltage and input current information of acquisition control module 2 gathers The unit 2-6 and output voltage current acquisition unit 2-7 for the output voltage current information of acquisition control module 2;Rectifier 1 Dc bus is accessed after being connected with control module 2, the output of rectifier 1 is set in 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 battery 5.
Specific control process is as follows:
Using the constant discharge current value of battery 5 set as electric discharge reference value, when control module 2 detects battery 5 Discharge current when being more than electric discharge reference value, the dutycycle rise of control pwm control circuit 2-4 output, export control module 2 Voltage on to dc bus becomes big, so as to reduce the electric current of the electric discharge of battery 5;Conversely, when the discharge current of battery 5 is less than During reference value, the dutycycle 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 battery 5, realize the constant-current discharge of battery 5.
Enter charging control process after the completion of electric discharge, using the constant-current charge current value of battery 5 as charging reference value, work as control When module 2 detects that the charging current of battery 5 is more than charging reference value, the dutycycle 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 battery 5;Conversely, when storage When the charging current of battery 5 is less than reference value, the dutycycle rise of control pwm control circuit 2-4 outputs, make control module 2 defeated The voltage rise gone out onto dc bus, increase the charging current of battery 5, realize the constant-current charge of battery 5.
In actual use, to realize the high accuracy of the constant current charge-discharge of battery 5, 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 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, allow the discharge and recharge of battery 5 Electric current is in highly stable state.
Embodiment three:Referring to shown in accompanying drawing 2 and Fig. 6, it is with the difference of embodiment two:System also 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 output current B of control module 2, the output current D of rectifier 1 and the discharge current A sums of battery 5;Charging process In, the output current D of rectifier 1 and the output current B sums of control module 2 are equal to the charging current A and load current C of battery 5 Sum.
Control module 2 makes the output voltage of rectifier 1 be slightly larger than the discharge cut-off voltage of battery 5 by communication unit 2-2, Even if there is any exception in discharge process in 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 battery 5 is put Electric current A will be constantly in steady state, and its core is that the control of the output voltage of control module 2 is controlled using the PWM of closed loop Technology processed, realize the constant-current discharge of battery 5.Its charge and discharge control process is similar to the above, repeats no more.
Examples of implementation described above are only the preferred embodiments of the invention, and the implementation model of the present invention is not limited with this Enclose, therefore the change that all shape, principles according to the present invention are made, it all should cover within the scope of the present invention.

Claims (10)

1. a kind of online charge and discharge control of battery and capacity check system, including rectifier (1), the first transformer (3), second Transformer (4), battery (5) and load (6);It is characterized in that:Also include control module (2);Wherein, (6) both ends are loaded It is connected respectively with battery (5) both ends, forms major loop;Control module (2) and rectifier (1) connection, for adjusting rectifier (1) output voltage and power output, at the same it is in parallel with battery (5) both control module (2) and rectifier (1), with load (6) connect;First and second transformer (3,4) is connected with battery (5) and load (6) respectively, is gathered 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 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 transformer (3,4), by first and second transformer The current signal that (3,4) detect is sent to CPU (2-1), for control rectifier (1) voltage and power output provide data according to According to.
3. a kind of online charge and discharge control of 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), the CPU (2-1) is connected 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 dutycycle of the PWM outputs of pwm control circuit (2-4), the power output 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 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.
5. a kind of online charge and discharge control of battery and capacity checking method, it is characterised in that:In accumulator charging/discharging process, control CPU in molding block sends control instruction by communication unit, the output voltage and power output of rectifier is adjusted, when making electric discharge Battery exports constant current, battery constant-current charge during charging;
Data that the output voltage and output power value of the rectifier are provided by first and second transformer are adjusted;During regulation, outside Portion's current acquisition unit receives the current data that first and second transformer collects, and CPU conducts are sent the data to after receiving data Handle foundation.
6. a kind of online charge and discharge control of battery according to claim 5 and capacity checking method, it is characterised in that: When electric discharge starts, the output voltage for adjusting rectifier is slightly above the discharge cut-off voltage of battery, starts electric discharge, and ensures to store Rectifier can be seamless to load output power during battery exception;After the completion of electric discharge, regulation rectifier output voltage steps up, and carries Up to realize the degree of battery constant-current charge.
7. a kind of online charge and discharge control of battery according to claim 5 and capacity checking method, it is characterised in that:When When the rectifier voltage regulation step-length can not meet the requirement that storage battery constant-current discharge accurately controls, CPU passes through drive circuit Control the dutycycle of the PWM outputs of pwm control circuit, the power output of auto-adjustment control module;The adjustment control module Depending on the output voltage current data for the control module that output power value is collected by output voltage current acquisition unit.
8. a kind of online charge and discharge control of battery according to claim 5 and capacity checking method, it is characterised in that:Control Molding block adjusts the output voltage and power output of single rectification module using the PWM control technologies of closed loop;Pass through communication unit Rectifier voltage is controlled to be slightly larger than the discharge cut-off voltage of battery.
9. a kind of online charge and discharge control of battery according to claim 5 and capacity checking method, it is characterised in that:Put In electric process, when the first transformer detects that the discharge current of battery becomes big, control module control rectifier output voltage Become big, so as to reduce battery discharging electric current;When the first transformer detects that the discharge current of battery becomes small, control module Control rectifier output voltage to reduce, so as to increase the discharge current of battery, realize the constant-current discharge of battery;
In charging process, when the first transformer detects that the charging current of battery becomes big, control module control rectifier is defeated Go out voltage reduction, so as to reduce battery charging current;When the first transformer detects that the charging current of battery becomes small, control The control rectifier output voltage rise of molding block, so as to increase the charging current of battery, realizes the constant-current charge of battery.
10. a kind of online charge and discharge control of battery according to claim 5 and capacity checking method, it is characterised in that: The end condition of online discharge process reaches test for battery tension less than predetermined voltage protection value, discharge time when continuing Between, monomer voltage less than predetermined monomer voltage protection value, system exception alarm, manually control stop discharge operation in any Kind.
CN201710785530.5A 2017-09-04 2017-09-04 A kind of online charge and discharge control of battery and capacity check system and method Pending CN107359676A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108448663A (en) * 2018-02-09 2018-08-24 广州泓泉能源科技有限公司 A kind of pure direct-flow storage battery Electrical Discharge Machine
CN111123126A (en) * 2020-02-11 2020-05-08 中国电信股份有限公司绍兴分公司 System and method for testing capacity of high-voltage direct-current and commercial power direct-supply online storage battery
CN111600347A (en) * 2020-04-30 2020-08-28 四川享锂来科技有限公司 Remote control system for sharing lithium battery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108448663A (en) * 2018-02-09 2018-08-24 广州泓泉能源科技有限公司 A kind of pure direct-flow storage battery Electrical Discharge Machine
CN111123126A (en) * 2020-02-11 2020-05-08 中国电信股份有限公司绍兴分公司 System and method for testing capacity of high-voltage direct-current and commercial power direct-supply online storage battery
CN111123126B (en) * 2020-02-11 2022-05-13 中国电信股份有限公司绍兴分公司 System and method for testing capacity of on-line storage battery directly supplied by high-voltage direct current and commercial power
CN111600347A (en) * 2020-04-30 2020-08-28 四川享锂来科技有限公司 Remote control system for sharing lithium battery
CN111600347B (en) * 2020-04-30 2021-07-30 四川享锂来科技有限公司 Remote control system for sharing lithium battery

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