CN104362717B - A kind of battery charging system - Google Patents
A kind of battery charging system Download PDFInfo
- Publication number
- CN104362717B CN104362717B CN201410512500.3A CN201410512500A CN104362717B CN 104362717 B CN104362717 B CN 104362717B CN 201410512500 A CN201410512500 A CN 201410512500A CN 104362717 B CN104362717 B CN 104362717B
- Authority
- CN
- China
- Prior art keywords
- circuit
- current
- electric current
- output
- charging paths
- 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
Landscapes
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention relates to a kind of battery charging system, comprising: the first rectification circuit；Inverter circuit, it is connected with described first rectification circuit；Voltage isolation circuit, it is connected with described inverter circuit；Second rectification circuit, it is connected with described voltage isolation circuit；Charging paths, it is connected in parallel on the outfan of described second rectified current；Electric quantity detecting circuit, it is connected with described charging paths；Control circuit, it is connected with described inverter circuit and electric quantity detecting circuit, for the output voltage according to described charging paths and output electric current, described charging paths output voltage is carried out closed loop regulation with output electric current, so that the output voltage of described charging paths is close with output electric current or is equal to respective predetermined target value.The output voltage of this system and output electric current connect the optimal input voltage and the predetermined target value of input current that can set near accumulator, to extend the life-span of accumulator.
Description
Technical field
The present invention relates to electric and electronic technical field, specifically, relate to a kind of battery charging system.
Background technology
Widely used a kind of battery charging system, uses simple phased direct rectification form, causes controlling
Precision is the highest, and output voltage fluctuation is big, ripple is big, and input voltage and output voltage do not have electrical isolation, safety
Property is poor.In order to overcome these problem, commonly used transformator first carries out blood pressure lowering to industrial-frequency alternating current, then to fall
Alternating current after pressure carries out rectification, although so solving electrical isolation problem, but transformator have volume big,
Heavier shortcoming causes a whole set of charging system integrated level low, and transformator can produce bigger power frequency noise, separately
Outward, the intellectuality of a whole set of battery charging system is low.Especially, to accumulator input voltage and input current
Intelligentized control method can be with prolonging service life of battery.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of battery charging system, including:
First rectification circuit, for becoming the first unidirectional current by the first AC conversion of input and export；
Inverter circuit, it is connected with described first rectification circuit, for described first unidirectional current is converted into second
Alternating current also exports；
Voltage isolation circuit, it is connected with described inverter circuit, for described second alternating current is carried out voltage every
From, obtain the 3rd alternating current；
Second rectification circuit, it is connected with described voltage isolation circuit, for being converted into by described 3rd alternating current
Second unidirectional current；
Charging paths, it is connected in parallel on the outfan of described second rectified current, for by described second rectification circuit
All or part of second unidirectional current of output is filled with accumulator；
Electric quantity detecting circuit, it is connected with described charging paths, for detecting the output voltage of described charging paths
With output electric current；
Control circuit, it is connected with described inverter circuit and electric quantity detecting circuit, for according to described charging paths
Output voltage and output electric current, to described charging paths output voltage and output electric current carry out closed loop regulation, from
And make the output voltage of described charging paths and output electric current near or equal to respective predetermined target value.
In a specific embodiment, described control circuit calculates output voltage and the output of charging paths respectively
Two differences obtained are compared by electric current and the difference of respective predetermined target value, and according to comparative result
Determine the regulation parameter in this cycle.
In a specific embodiment, described control circuit is according to the regulation parameter in comparative result and previous cycle
Determine the regulation parameter in this cycle,
If the maximum parameter of difference is different from the regulation parameter in previous cycle, then using the parameter of this difference maximum as
The regulation parameter in this cycle；
If the parameter of difference maximum is identical with the regulation parameter in previous cycle, then using another parameter as this cycle
Regulation parameter.
In a specific embodiment, described electric quantity detecting circuit also detects the output of described second rectification circuit
Electric current, described control circuit is according to the output voltage of the described charging paths detected and output electric current and institute
State the output electric current of the second rectification circuit, realize to described charging paths output voltage and output electric current and
The closed loop regulation of the output electric current of described second rectification circuit so that the output voltage of described charging paths and defeated
Go out the output electric current of electric current and described second rectification circuit near or equal to its predetermined target value.
In a specific embodiment, described control circuit is calculated respectively the output voltage of charging paths, defeated
Go out the output electric current of electric current and the second rectification circuit and the difference of respective predetermined target value, and to three obtained
Difference compares, and obtains the regulation parameter in this cycle according to comparative result, wherein,
If the maximum parameter of difference is different from the regulation parameter in previous cycle, then using the parameter of this difference maximum as
The regulation parameter in this cycle；
If the maximum parameter of difference is identical with the regulation parameter in previous cycle, then using the parameter second largest for difference as
The regulation parameter in this cycle.
In a specific embodiment, described control circuit is by the output voltage of described charging paths and output electricity
At least one in stream, and the output electric current of the second rectification circuit compares with respective default protection threshold value
Relatively,
If the output voltage of described charging paths and output electric current, and the output electric current of the second rectification circuit in
At least one is more than respective default protection threshold value, and described control circuit controls described inverter circuit and stops inversion.
In a specific embodiment, described electric quantity detecting circuit also detects the current electric quantity of accumulator, described
Control circuit is according to the predetermined target value of the output electric current of described current electric quantity regulation charging paths.
In a specific embodiment, described current electric quantity is the biggest, and the most described control circuit is by charging paths
The predetermined target value of output electric current is adjusted the least.
In a specific embodiment, set gradually the first charge value, the second charge value from small to large,
If current electric quantity is less than or equal to the first charge value, described control circuit is by the output electric current of charging paths
Predetermined target value be set to the first predetermined current desired value；
If current electric quantity is more than the first charge value and less than the second charge value, described control circuit is worked as according to described
Front electricity is according to the predetermined target value of the output electric current of default regulation current model regulation charging paths；
If current electric quantity is more than or equal to the second charge value, described control circuit is by the output electric current of charging paths
Predetermined target value be set to the second predetermined current desired value.
In a specific embodiment, described electric quantity detecting circuit also detects the current electric quantity of accumulator, described
Control circuit is according to the predetermined target value of current electric quantity regulation charging voltage.
In a specific embodiment, described current electric quantity is the biggest, and the most described control circuit is by charging paths
The predetermined target value of output voltage is adjusted the least.
In a specific embodiment, set gradually the 3rd charge value, the 4th charge value from small to large, the 5th
Charge value,
If current electric quantity is less than or equal to the 3rd charge value, described control circuit is by the output voltage of charging paths
Predetermined target value be set to the first predeterminated voltage predetermined target value；
If current electric quantity is more than the 3rd charge value and less than the 4th charge value, described control circuit is worked as according to described
Front electricity is according to the predetermined target value of the output voltage of predeterminated voltage regulation model regulation charging paths；
If current electric quantity is more than or equal to the 5th charge value, described control circuit is by the output voltage of charging paths
Predetermined target value be set to the second predeterminated voltage predetermined target value.
In a specific embodiment, described system also includes temperature detecting module, and it is used for measuring accumulator
Or the temperature of accumulator surrounding,
Described control circuit regulates the goal-selling of charging voltage according to the temperature of accumulator or accumulator surrounding
Value.
In a specific embodiment, when the temperature of accumulator or accumulator surrounding is less than or equal to presetting
During temperature, then the output voltage of charging paths is predeterminated voltage desired value；
When the temperature of accumulator or accumulator surrounding is more than preset temperature, along with accumulator or accumulator week
The temperature in collarette border gradually rises from preset temperature, described control circuit presetting the output voltage of charging paths
Desired value is gradually turned down from described predeterminated voltage desired value.
In a specific embodiment, described inverter circuit includes inverter trigger circuit and half-bridge inversion circuit,
Wherein:
Inverter trigger circuit, it is connected with control circuit and half-bridge inversion circuit, and described control circuit controls inversion
Trigger circuit and produce the driving pulse of corresponding dutycycle；
Half-bridge inversion circuit, it is connected with the first rectification circuit, voltage isolation circuit and inverter trigger circuit,
For the unidirectional current of output being converted into according to described driving pulse the second alternating current of relevant voltage.
The just direct rectification of electrical network alternating current power supply of first rectification circuit of the present invention is the first smoother unidirectional current,
Inverter circuit by the second alternating current that the first DC inverter is that frequency is higher, due to the second alternating current frequency relatively
High then electrical isolation can be carried out with the voltage isolation circuit of smaller size smaller, and produced by voltage isolation circuit
Noise is smaller.Additionally, control circuit carries out closed loop regulation to output voltage and the output electric current of charging paths,
It is close to the input characteristics of accumulator, to extend the life-span of accumulator.
Other features and advantages of the present invention will illustrate in the following description, and, partly from description
In become apparent, or by implement the present invention and understand.The purpose of the present invention and other advantages can be passed through
Structure specifically noted in description, claims and accompanying drawing realizes and obtains.
Accompanying drawing explanation
Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:
Fig. 1 is the circuit connection diagram of the battery charging system of one embodiment of the present invention.
In the accompanying drawings, identical parts use identical reference.Accompanying drawing is not drawn according to actual ratio.
Detailed description of the invention
Below in conjunction with accompanying drawing, the invention will be further described, first introduces the first embodiment of the present invention
Battery charging system.
Fig. 1 is the circuit connection diagram of the battery charging system of one embodiment of the present invention.
Battery charging system includes main circuit.Main circuit includes that input connects with external power grid and for inputting
The first AC conversion become the first unidirectional current the first rectification circuit 1 exported, input and the first rectified current
The outfan on road 1 connects and for the first unidirectional current is converted into the second alternating current the inverter circuit 3 exported,
Input is connected with the outfan of inverter circuit 3 and for the second alternating current being carried out voltage isolation and obtaining the 3rd
The voltage isolation circuit T1 of alternating current, input is connected with the outfan of voltage isolation circuit T1 and for by three
Alternating current also converts thereof into the second unidirectional current the second rectification circuit 5 exported, input and the second rectified current
The outfan on road 5 connects, outfan is connected to accumulator 7 both positive and negative polarity and for being exported by the second rectification circuit 5
Direct current be filtered and to the filter circuit 6 of accumulator 7 charging, and connect filter circuit 6 and accumulator
The charging paths of 7.
Battery charging system also includes auxiliary circuit 4.Auxiliary circuit 4 includes that detecting port is connected to charging
Road is for detecting output voltage and the electric quantity detecting circuit of output electric current of charging paths, and is connected to inversion electricity
Road 3 and the control circuit of electric quantity detecting circuit.Control circuit is for the output voltage according to charging paths and output
Electric current, carries out closed loop regulation to charging paths output voltage and output electric current, so that described charging paths
Output voltage is close with output electric current or is equal to its predetermined target value.
In the present embodiment, the first rectification circuit 1 is three-phase bridge rectifier circuit.Three-phase bridge rectifier circuit bag
Including 6 diodes 11～16,6 diodes are divided into two group 11～13 and 14～16, first group of diode 11～13
Negative electrode link together constitute three-phase bridge rectifier circuit output anode D1, second group of diode 14～16
Anode link together constitute three-phase bridge rectifier circuit output cathode D2, each diode of first group
Anode one by one corresponding with the negative electrode of the diode of second group be connected, i.e. 11 and 14,12 and 15,13 and 16,
First group of diode and second group of diode junction be respectively battery charging system three-phase input end mouth U,
V, W, the external three-phase power line of input port U, V, W.6 diodes define that three phase network carries
Electric current can only flow to anode D1, so three-phase bridge rectifier circuit can will input battery charging system three
Cross streams electricity changes into direct current output.
In the present embodiment, inverter circuit 3 includes half-bridge inversion circuit and inverter trigger circuit.Inversion triggers
Circuit includes the gate trigger circuit 31 being connected to half-bridge inversion circuit and is connected to gate trigger circuit 31 He
The pwm pulse generator 39 of control circuit.Half-bridge inversion circuit includes that two ends are connected to the first rectified current
The output anode D1 on road 1, the Support Capacitor 36 of negative electrode D2 end, in parallel with Support Capacitor 36 after two series connection
Two Change phase capacitances 37,38, the IGBT 32 that the output anode D1 of colelctor electrode and the first rectification circuit 1 connects
(IGBT is the abbreviation of insulated gate bipolar transistor), emitter stage and the output cathode of the first rectification circuit 1
The current collection of the IGBT 33 that D2 connects and colelctor electrode is connected with the emitter stage of IGBT 32, negative electrode and IGBT 32
The diode 34 that pole connects and anode connects with IGBT 32 emitter stage, negative electrode connects with the colelctor electrode of IGBT 33
And the diode 35 that anode connects with IGBT 33 emitter stage, and the first driving pulse outfan be connected to connect
The gate pole of IGBT 32 and emitter stage and the second driving pulse outfan are connected to gate pole and the emitter stage of IGBT 33
Gate trigger circuit 31.Two the connected ends of electric capacity 37,38, two IGBT 32,33 are connected and hold composition inverse
The outfan on power transformation road 3.
The pulse signal that gate trigger circuit 31 sends according to pwm pulse generator 39 is from the first driving pulse
First driving pulse of outfan one positive and negative space changing of periodicity of output, surpassing of the voltage of the first driving pulse
Cross the threshold voltage of IGBT 32.The time that first driving pulse outfan exports positive voltage within a cycle is little
In or equal to time of output negative voltage, be output as positive voltage and then turn on IGBT 32, when being output as negative voltage then
Cut-off IGBT 32, so the ON time that IGBT 32 is within a cycle is less than or equal to deadline.The
Two driving pulse outfans export simultaneously one identical with the first drive pulse shape but the of difference half period
Two driving pulses, turn on IGBT 33, when the second driving pulse is negative voltage when the second driving pulse is positive voltage
Cut-off IGBT 33.The first and second driving pulses that so gate trigger circuit 31 sends turn on two in turn
IGBT 32,33, and end another IGBT when turning on an IGBT so that Change phase capacitance 37,38
The voltage at two ends is continually changing, thus two Change phase capacitance 37,38 alternately another electric discharges of charging,
So outfan of half-bridge inversion circuit just can be with output single-phase alternating current.Preferably, this driving pulse is square
Shape ripple, the voltage of the first and second driving pulses is the threshold voltage of the IGBT of 1.5 times to 3 times.Such
One or second driving pulse can turn on rapidly correspondence IGBT, the input voltage of voltage isolation circuit T1 tends to square
Shape ripple.The dutycycle adjusting the second driving pulse and/or the second driving pulse can adjust IGBT in the cycle
ON time, and then adjust half-bridge inversion circuit output voltage.
Inversion in the inverter control signal that pwm pulse generator 39 sends according to control circuit triggers signal and produces
Raw lasting pulse signal input gate trigger circuit 31, produces the first driving controlling gate trigger circuit 31
Pulse and the second driving pulse.In the inverter control signal that pwm pulse generator 39 sends according to control circuit
Inversion stop signal stop produce pulse, with control gate trigger circuit 31 stop produce the first driving pulse
With the second driving pulse.Pwm pulse generator 39 sends always according to closed loop priority P ID controller 44
Pressure regulation signal in inverter control signal adjusts the width of the pulse signal that pwm pulse generator 39 sends with control
The first driving pulse that gate trigger circuit 31 processed sends and the dutycycle of the second driving pulse.
In the present embodiment, voltage isolation circuit T1 is isolating transformer.Isolating transformer side is connected to inverse
The outfan on power transformation road 3.Isolating transformer with electrical isolation input current and output electric current, and can will input electricity
Stream blood pressure lowering.
In the present embodiment, the second rectification circuit 5 is bridge rectifier.Bridge rectifier includes 4 two
Pole pipe 51～54,4 diodes are divided into two groups, and the negative electrode of first group of diode 51,53 links together composition
The output anode of single phase rectifier circuit 5, the anode of second group of diode 52,54 links together composition bridge-type
The output cathode of rectification circuit, the negative electrode of the anode of each diode of first group diode with second group one by one
Corresponding connected, i.e. diode 51 is connected with diode 52, diode 53 is connected with diode 54, first group
Diode and second group of diode connecting place connect with voltage isolation circuit T1 outfan respectively.Diode is unidirectional
The characteristic of conducting defines that the electric current of the output of voltage isolation circuit T1 can only flow to the anode of bridge rectifier,
So the alternating current of input can be converted into unidirectional current output by bridge rectifier.
In the present embodiment, filter circuit 6 is inverted L shape filter circuit.Output sun at the second rectification circuit 5
Pole is connected to one end of inductance 61.The other end of inductance 61 is the output anode DC1 of this battery charging system.
The negative electrode of the second rectification circuit constitutes the output cathode DC2 of this battery charging system.Battery charging system
Outfan shunt capacitance 62.When flowing through the current fluctuation of inductance 62, the induced electromotive force produced in inductance 62
The change of electric current will be stoped.When being increased by the electric current of inductance 62, the self induction electromotive force that inductance 62 produces with
The sense of current is contrary, stops the increase of electric current, a part of electric energy is changed into magnetic field energy simultaneously and be stored in inductance 62
Among.When being reduced by the electric current of inductance 62, self induction electromotive force is identical with the sense of current, stops electric current
Reduce, discharge the energy of storage, to compensate the reduction of electric current simultaneously.Therefore after inductance 62 filters, no
But the pulsation of load current and voltage reduces, and waveform is smoothened, and diode in the second rectification circuit 5
The angle of flow of 51～54 increases, and remaining a small amount of alternating component filters through electric capacity 62 below again, further by
Weaken.
In the present embodiment, charging paths is a branch road of the outfan being parallel to filter circuit 6, if not setting
Putting filter circuit 6 then charging paths is the branch road being connected in parallel on the second rectification circuit.Battery charging system
Output anode DC1 connect the positive pole of accumulator 7, the output cathode DC2 of battery charging system connects and stores
The negative pole of battery 7.Battery charging system also includes the second filtering being connected in parallel on battery charging system outfan
Circuit EMI.The outfan of the second filter circuit EMI can be that direct-flow current consumer carries electric current.
In the present embodiment, electric quantity detecting circuit includes that the outfan being arranged on filter circuit 6 is for detection filter
Circuit 6 exports the first current acquisition element SC1 of electric current, is arranged on one end of accumulator 7 for detecting charging
Second current acquisition element SC2 of the output electric current of branch road, and it is connected in parallel on the outfan of charging paths for examining
Survey the testing circuit of charging paths output voltage.If being not provided with filter circuit 6, the first electricity of electric quantity detecting circuit
Stream acquisition elements SC1 is arranged on the outfan of the second rectification circuit, for the output electricity of detection the second rectification circuit
Stream.
In the present embodiment, control circuit includes logic controller 41, closed loop priority P ID controller 44.
Logic controller 41 is connected to pwm pulse generator 44 and closed loop priority P ID controller.Logic control
Commencing signal or stopping signal that device 41 produces according to closed loop priority P ID controller 44 produce to pwm pulse
Raw device 39 sends the inversion in inverter control signal respectively and triggers signal or inversion stopping signal, to control PWM
Pulse generator 39 starts to produce or stop to produce pulse signal.
In the present embodiment, closed loop priority P ID controller 44 is connected to electric quantity detecting circuit, logic control
Device 41 and pwm pulse generator 44.
Closed loop priority P ID controller 44 is for calculating the output voltage of charging paths, output electric current and the respectively
The difference of output electric current and the respective predetermined target value of two rectification circuits, according to the size comparing three differences
Result is selected regulation parameter and is carried out closed loop regulation, if the parameter of difference maximum and the regulation parameter in previous cycle are not
With, then using parameter maximum for difference as the regulation parameter in this cycle, if the maximum parameter of difference and previous cycle
Regulation parameter identical, then using another parameter as the regulation parameter in this cycle.Closed loop priority P ID controls
The degree that device 44 exceeds its predetermined target value according to the parameter of regulation sends pressure regulation to pwm pulse generator 39
Signal.Pwm pulse generator 39 is reduced or increased the width of pulse signal according to pressure regulation signal, thus reduces
Or increase the first driving pulse of sending of gate trigger circuit 31 and the second driving pulse dutycycle, and then
The output voltage of inverter circuit 3 is reduced or increased so that the parameter beyond predetermined target value is reduced or increased in advance
If desired value.Obvious, closed loop priority P ID controller 44 closed loop can also regulate the defeated of charging paths
Go out voltage and output electric current.
In the present embodiment, this system also includes the residue residue being connected to closed loop priority P ID controller 44
Capacity check device and temperature sensing circuit.Residual capacity testing circuit can detect the residual capacity of accumulator 7
Value, and it is transmitted to closed loop priority P ID controller 44.Temperature sensing circuit can detect accumulator 7
Temperature value, and be transmitted to closed loop priority P ID controller 44.Closed loop priority P ID controller 44
The predetermined target value of the output electric current of charging paths can be automatically calculated according to the remaining capacity value of accumulator 7.Close
Ring priority P ID controller 44 can automatically calculate the output electricity of charging paths according to the temperature value of accumulator 7
The predetermined target value of pressure.Specific as follows:
After closed loop priority P ID controller 44 receives the residual capacity data that residual capacity testing circuit sends,
Residual capacity is divided by with rated capacity, obtains residual capacity and account for the percentage ratio of rated capacity.Then, according to hundred
Proportion by subtraction value determines the predetermined target value of the output electric current of charging paths, the default mesh of the output electric current of charging paths
Scale value reduces along with percent value and reduces.Such as: when this percentage ratio is more than 50%, closed loop priority P ID
The predetermined target value of the output electric current of charging paths is then adjusted to a bigger value by controller 44, thus to storage
Battery 7 carries out big electric current quick charge, prevents accumulator 7 from reducing the property of accumulator 7 because of power shortage overlong time
Energy；When this percent value is less than 50% and is more than 5%, closed loop priority P ID controller 44 is then charging
The predetermined target value of the output electric current on road is gradually turned down, thus prevents long-time large current charge from damaging accumulator 7；
When this percentage ratio is less than 5%, the predetermined target value of the output electric current of charging paths is reduced to zero, thus anti-
Only accumulator 7 is caused to damage or hydraulic performance decline accumulator 7 overcharge.
Power consumption testing circuit replaces residual capacity testing circuit directly to detect the current electric quantity of accumulator, according to control
Circuit processed is according to the predetermined target value of the output electric current of current electric quantity regulation charging paths, such as: the first charge value
For the 50% of battery rating, when current electric quantity is less than or equal to the first charge value, closed loop priority P ID
The predetermined target value of the output electric current of charging paths is then adjusted to the first bigger predetermined current target by controller 44
Value, prevents accumulator 7 from reducing the performance of accumulator 7 because of power shortage overlong time；Second charge value is accumulator
The 95% of rated capacity, when current electric quantity is more than the first charge value and less than the second charge value, closed loop priority P ID
Controller 44 is negative correlation according to one with the predetermined target value of the output electric current of current electric quantity value and charging paths
Function regulate charging paths output electric current predetermined target value, to prevent long-time large current charge from damaging
Accumulator 7；When current electric quantity is more than or equal to the second charge value, closed loop priority P ID controller 44 will charging
The predetermined target value of the output electric current of branch road be set to one the least or be zero the second predetermined current desired value,
Prevent from causing accumulator 7 to damage or hydraulic performance decline accumulator 7 overcharge.
To further improvement of the present invention, can be based on this accumulator 7 on closed loop priority P ID controller 44
With the residual capacitance of accumulator 7 and the output electric current of charging paths for variable optimal charge curvilinear equation, residue
The residual capacitance of the accumulator 7 that capacity detection circuit detects calculates the default mesh of the output electric current of charging paths
Scale value.Inventor finds, accumulator 7 has with the residual capacity of accumulator 7 as independent variable, with charging paths
The output electric current that output electric current is dependent variable and charging paths reduce along with the residual capacity of accumulator 7
And continually varying optimal charge curve.If the output electric current of charging paths presses this curvilinear motion, it is possible to
It is greatly shortened the charging interval, and the capacity and life-span on battery does not the most affect.Those skilled in the art are permissible
Accumulator 7 is tested, simulates this optimal charge curvilinear equation.
When closed loop priority P ID controller 44 detects the temperature of accumulator 7 less than preset temperature, closed loop is excellent
First level PID controller 44 improves the predetermined target value of the output voltage of charging paths, and the temperature of accumulator 7 is more
Low, the predetermined target value of the output voltage of charging paths is the highest.When closed loop priority P ID controller 44 detects
When temperature to accumulator 7 is higher than preset temperature, closed loop priority P ID controller 44 reduces charging paths
The predetermined target value of output voltage, the temperature of accumulator 7 is the highest, the goal-selling of the output voltage of charging paths
It is worth the lowest.The predetermined target value of charging paths output voltage, too high charging paths can not be infinitely provided certainly
Output voltage can cause battery damage, so can not improve charging again when temperature is less than some preset temperature
The predetermined target value of branch road output voltage, at this moment closed loop priority P ID controller 44 is maintained at one relatively
Big predeterminated voltage desired value, when the temperature of accumulator is more than preset temperature, along with the temperature of accumulator is from advance
If temperature gradually rises, closed loop priority P ID controller 44 is by the goal-selling of the output voltage of charging paths
Value is gradually turned down from described predeterminated voltage predetermined target value.
Preset temperature value is generally the rated temperature of accumulator.Such as this preset temperature value is 25 DEG C.Along with environment
Temperature reduces, and the electrolyte flow of accumulator 7 reduces, and combination reaction slows down, when ambient temperature is less than 25
DEG C time, make accumulator 7 capacity be difficult to reach rated capacity.When ambient temperature is higher than 25 DEG C, accumulator 7 is held
Amount high pressure rated capacity, when being charged accumulator 7, quite a few charging current is converted into heat energy, makes
Accumulator 7 internal temperature aggravates, and causes vicious cycle, causes accumulator 7 to be damaged.Too high temperature can cause
Charging stream increases, owing to overcharging the accumulation of electricity, so that accumulator 7 cycle life shortens.Have been demonstrated,
When ambient temperature is at 25 DEG C, temperature often raises 6～10 DEG C, accumulator 7 lost of life half.Along with electric power storage
The variations in temperature in pond 7 adjusts the charging voltage (i.e. the output voltage of charging paths) of accumulator 7, can avoid
The overcharge of battery and charge less electricity, extend accumulator 7 life-span.Those skilled in the art can record and preset temperature
The optimal charge piezoelectricity value of single accumulator 7 under degree.
As a further improvement on the present invention, closed loop priority P ID controller 44 sets the output of charging paths
The predetermined threshold value of the output electric current of electric current, output voltage and filter circuit 6, closed loop priority P ID controller
44 periodically compare determine the output electric current of charging paths, output voltage and filter circuit 6 output electric current with
Its threshold value, then sends stopping signal to logic controller 41 when any of which item exceedes its predetermined threshold value, makes storage
Batter-charghing system and accumulator 7 are protected.
Although by reference to preferred embodiment, invention has been described, but without departing from the scope of the present invention
In the case of, it can be carried out various improvement and element therein can be replaced with equivalent.The present invention is not
It is confined to specific embodiment disclosed herein, but includes all technical sides fallen within the scope of the appended claims
Case.
Claims (10)
1. a battery charging system, including:
First rectification circuit, for becoming the first unidirectional current by the first AC conversion of input and export；
Inverter circuit, it is connected with described first rectification circuit, for described first unidirectional current is converted into the second alternating current and is exported；
Voltage isolation circuit, it is connected with described inverter circuit, for described second alternating current is carried out voltage isolation, obtains the 3rd alternating current；
Second rectification circuit, it is connected with described voltage isolation circuit, for described 3rd alternating current is converted into the second unidirectional current；
Charging paths, it is connected in parallel on the outfan of described second rectified current, for all or part of second unidirectional current of described second rectification circuit output is filled with accumulator；
Electric quantity detecting circuit, it is connected with described charging paths, for detecting output voltage and the output electric current of described charging paths；
Control circuit, it is connected with described inverter circuit and electric quantity detecting circuit, for the output voltage according to described charging paths and output electric current, described charging paths output voltage and output electric current are carried out closed loop regulation, so that the output voltage of described charging paths is close with output electric current or is equal to respective predetermined target value
Described control circuit calculates the output voltage of charging paths respectively and exports the difference of electric current and respective predetermined target value, compares two differences obtained, and determines the regulation parameter in this cycle according to comparative result,
Described control circuit according to the regulation parameter in regulation this cycle of parameter determination in comparative result and previous cycle,
If the maximum parameter of difference is different from the regulation parameter in previous cycle, then using the parameter of this difference maximum as the regulation parameter in this cycle；
If the maximum parameter of difference is identical with the regulation parameter in previous cycle, then using another parameter as the regulation parameter in this cycle.
2. the system as claimed in claim 1, it is characterized in that, described electric quantity detecting circuit also detects the output electric current of described second rectification circuit, described control circuit is according to the output voltage of the described charging paths detected and output electric current and the output electric current of described second rectification circuit, realize to described charging paths output voltage and output electric current and described second rectification circuit export electric current closed loop regulation so that the output voltage of described charging paths and output electric current and described second rectification circuit output electric current near or be equal to respective predetermined target value.
3. system as claimed in claim 2, it is characterized in that, described control circuit is calculated respectively the output electric current of the output voltage of charging paths, output electric current and the second rectification circuit and the difference of respective predetermined target value, and three differences obtained are compared, the regulation parameter in this cycle is obtained according to comparative result, wherein
If the maximum parameter of difference is different from the regulation parameter in previous cycle, then using the parameter of this difference maximum as the regulation parameter in this cycle；
If the maximum parameter of difference is identical with the regulation parameter in previous cycle, then using the parameter second largest for difference as the regulation parameter in this cycle.
4. system as claimed in claim 2 or claim 3, it is characterised in that at least one in the output voltage of described charging paths and output electric current, and the output electric current of the second rectification circuit is compared by described control circuit with respective default protection threshold value,
If in the output voltage of described charging paths and output electric current, and the output electric current of the second rectification circuit, at least one controls described inverter circuit stop inversion more than respective default protection threshold value, described control circuit.
5. system as claimed any one in claims 1 to 3, it is characterised in that described electric quantity detecting circuit also detects the current electric quantity of accumulator, described control circuit is according to the predetermined target value of the output electric current of described current electric quantity regulation charging paths.
6. system as claimed in claim 5, it is characterised in that described current electric quantity is the biggest, the predetermined target value of the output electric current of charging paths is adjusted the least by the most described control circuit.
7. system as claimed in claim 5, it is characterised in that set gradually the first charge value, the second charge value from small to large,
If current electric quantity is less than or equal to the first charge value, the predetermined target value of the output electric current of charging paths is set to the first predetermined current desired value by described control circuit；
If current electric quantity is more than the first charge value and less than the second charge value, described control circuit regulates the predetermined target value of the output electric current of charging paths according to described current electric quantity according to default regulation current model；
If current electric quantity is more than or equal to the second charge value, the predetermined target value of the output electric current of charging paths is set to the second predetermined current desired value by described control circuit.
8. the system as according to any one of claims 1 to 3, it is characterised in that described system also includes temperature detecting module, it is for measuring accumulator or the temperature of accumulator surrounding,
Described control circuit regulates the predetermined target value of charging voltage according to the temperature of accumulator or accumulator surrounding.
9. system as claimed in claim 8, it is characterised in that
When the temperature of accumulator or accumulator surrounding is less than or equal to preset temperature, then the output voltage of charging paths is predeterminated voltage desired value；
When the temperature of accumulator or accumulator surrounding is more than preset temperature, along with the temperature of accumulator or accumulator surrounding gradually rises from preset temperature, the predetermined target value of the output voltage of charging paths is gradually turned down by described control circuit from described predeterminated voltage desired value.
10. the system as according to any one of claims 1 to 3, it is characterised in that described inverter circuit includes inverter trigger circuit and half-bridge inversion circuit, wherein:
Inverter trigger circuit, it is connected with control circuit and half-bridge inversion circuit, and described control circuit controls inverter trigger circuit and produces the driving pulse of corresponding dutycycle；
Half-bridge inversion circuit, it is connected with the first rectification circuit, voltage isolation circuit and inverter trigger circuit, for the first unidirectional current is converted into the second alternating current of relevant voltage according to described driving pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512500.3A CN104362717B (en) | 2014-09-29 | 2014-09-29 | A kind of battery charging system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410512500.3A CN104362717B (en) | 2014-09-29 | 2014-09-29 | A kind of battery charging system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104362717A CN104362717A (en) | 2015-02-18 |
| CN104362717B true CN104362717B (en) | 2016-08-17 |
Family
ID=52529955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410512500.3A Active CN104362717B (en) | 2014-09-29 | 2014-09-29 | A kind of battery charging system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104362717B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9748788B2 (en) * | 2015-09-17 | 2017-08-29 | Qualcomm Incorporated | Systems and methods for charging a battery |
| CN113178922A (en) * | 2021-05-13 | 2021-07-27 | 浙江特康电子科技有限公司 | Charging control method, system and device and charging device |
| CN114285112A (en) * | 2021-11-25 | 2022-04-05 | 东风柳州汽车有限公司 | Vehicle storage battery power shortage prevention control method, device, equipment and storage medium |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101621212B (en) * | 2008-06-30 | 2012-07-04 | 中国北车集团大连机车车辆有限公司 | Method for controlling battery charging |
| CN101521402B (en) * | 2008-06-30 | 2013-02-13 | 中国北车集团大连机车车辆有限公司 | Three-phase bridge type inverse high-capacity storage battery charging device |
| CN102638085A (en) * | 2011-05-31 | 2012-08-15 | 重庆瑞升康博电气有限公司 | Intelligent storage battery charging and management device for electric vehicles |
-
2014
- 2014-09-29 CN CN201410512500.3A patent/CN104362717B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104362717A (en) | 2015-02-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105207258B (en) | A kind of photovoltaic direct-current micro-grid energy cooperative control device | |
| CN102763303B (en) | Battery protecting circuit and method for energy collecting device circuit | |
| EP2362517A2 (en) | Power storage system | |
| CN201466775U (en) | Storage battery charging and discharging device | |
| CN102005772B (en) | Network combination inversion system and control method thereof | |
| CN106786485B (en) | Voltage ripple suppression method for direct-current micro-grid under unbalanced load | |
| CN103219878A (en) | Capacitor discharging circuit and power converter | |
| CN109256941B (en) | Software control system and method for soft start of inverter | |
| CN104158223B (en) | A kind of control method of grid-connected inverter and system | |
| CN108988635B (en) | A kind of more level Boost converters, inversion system and control method | |
| CN104753445B (en) | Solar power supply apparatus | |
| CN103441569A (en) | Device and method for monitoring electrical network voltage instant jittering | |
| WO2017011547A1 (en) | Switching circuits having multiple operating modes and associated methods | |
| CN105703689A (en) | High-power brushless doubly-fed machine three-level bidirectional variable-frequency speed regulation system | |
| CN104362720B (en) | Storage battery charging system | |
| CN104362717B (en) | A kind of battery charging system | |
| CN104269914A (en) | Wind-solar complementary control and inversion integrated machine | |
| TW201735521A (en) | Inverter device and controlling method thereof | |
| CN103856086A (en) | Current transformer electricity taking control method and system | |
| CN101540514B (en) | Battery charge control circuit, charger and battery charge control method | |
| CN205429847U (en) | Mining charging device with two closed -loop control | |
| CN102891523B (en) | Aging control method and system for electrical energy self-circulation type high-power charger | |
| CN103152928A (en) | Load overvoltage protection circuit and control method thereof | |
| CN103887864A (en) | Charger special for storage battery matched with lifting electromagnet | |
| CN203775041U (en) | Alternating-current power source based on dual voltage rectifying and BOOST circuits |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee after: ZHUZHOU CRRC TIMES ELECTRIC Co.,Ltd. Address before: The age of 412001 in Hunan Province, Zhuzhou Shifeng District Road No. 169 Patentee before: ZHUZH CSR TIMES ELECTRIC Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |