CN105186649A - Pulse type lithium iron battery charger system and charging method - Google Patents
Pulse type lithium iron battery charger system and charging method Download PDFInfo
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- CN105186649A CN105186649A CN201510640379.7A CN201510640379A CN105186649A CN 105186649 A CN105186649 A CN 105186649A CN 201510640379 A CN201510640379 A CN 201510640379A CN 105186649 A CN105186649 A CN 105186649A
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Abstract
The invention discloses a pulse type lithium iron battery charger system and a charging method. The system comprises a main circuit, a front panel control system and an input/output interface, wherein the main circuit comprises a rectification unit, a modulation unit and a CPU (Central Processing Unit) control unit; the rectification unit and the CPU control unit are both connected with the modulation unit; the CPU control unit is connected with the front panel control system; the rectification unit and the modulation unit are both connected with the input/output interface; the front panel control system is used for setting a charging parameter value; the main circuit is used for converting an alternating current into a direct current and modulating the direct current according to the charging parameter value; and the input/output interface is used for outputting a charging current. An electric charge acceptance rate of the lithium iron battery can be improved, the temperature rise of the battery in a charging process is lowered, the battery can be guaranteed to achieve a full-charging state when charging is carried out each time, and the service life of the battery is prolonged.
Description
Technical field
The present invention relates to field of electrical equipment, be specifically related to a kind of pulsed lithium iron battery charger system and charging method.
Background technology
The invention of electric automobile and electric bicycle is come out, and brings great convenience to the traffic of people and work.They all have the characteristics such as clean, environmental protection, use be flexible.Its battery quality used quality and correct charging modes, then affect the useful life of battery.That is, the useful life of car itself is affected.
Lithium iron battery has many merits, and the battery of various different capabilities can be produced, be widely used in the aspects such as the energy storage device of Large Electric vehicle, LEV (Light Electric Vehicle), solar energy and wind power generation, small medical equipment and portable instrument, UPS and emergency light, warning lamp and mine lamp.Research and practice shows, battery charging process has the greatest impact to battery life.That is, most lithium iron batteries does not make to damage, but " being filled bad ".Therefore the lithium iron battery charger system of development of new is of great practical significance.
There is following drawback in traditional charger: traditional charger charging current when sulfation appears in battery diminishes, and use user's charging interval generally to remain unchanged normally, like this, battery is just in non-full state always, and user then sensed cell capacity declines.
Summary of the invention
Diminish for traditional charger charging current when sulfation appears in battery, battery is in non-full state always, the problem that user's sensed cell capacity declines, and the invention provides a kind of pulsed lithium iron battery charger system and charging method.
First aspect, the present invention proposes a kind of pulsed lithium iron battery charger system, comprises main circuit, front panel control system and input/output interface; Described main circuit comprises rectification unit, modulating unit and CPU control unit;
Described rectification unit is all connected with described modulating unit with described CPU control unit;
Described CPU control unit is connected with described front panel control system;
Described rectification unit is all connected with described input/output interface with described modulating unit;
Described front panel control system is used for arranging charging parameter value; Described main circuit is used for alternating current to be converted to direct current, and modulates described direct current according to described charging parameter value; Described input/output interface is for exporting charging current.
Preferably, described front panel control system comprises pressure regulation acknowledgement key, voltage regulating knob, electric current adjustment knob, frequency adjustment knob, waveform switch knob, output switch, voltage display screen, electric current display screen and frequency display screen;
Described pressure regulation acknowledgement key, described voltage regulating knob, described electric current adjustment knob, described frequency adjustment knob, described waveform switch knob are all connected with described CPU control unit with described output switch;
Described voltage display screen is connected with described voltage regulating knob;
Described electric current display screen is connected with described electric current adjustment knob;
Described frequency display screen is connected with described frequency adjustment knob;
Described pressure regulation acknowledgement key is used for confirming adjustment voltage.
Preferably, described input/output interface comprises power input interface, voltage acquisition interface and current output interface;
Described power input interface is used for providing working power for pulsed lithium iron battery charger system;
Described voltage acquisition interface is used for being connected with lithium iron battery to be charged by adopting line outside voltage and charging;
Described current output interface is used for providing charging current for lithium iron battery to be charged.
Preferably, described current output interface comprises the first current output interface and the second current output interface, and described first current output interface is connected with lithium iron battery positive pole, and described second current output interface is connected with lithium iron battery negative pole.
Preferably, described voltage acquisition interface first end is connected with lithium iron battery positive pole by adopting line outside voltage, and described voltage acquisition interface second end is connected with lithium iron battery negative pole by adopting line outside voltage.
Preferably, comprising:
According to the lithium iron battery charging specification preset and charging requirement, by front panel set-up of control system charging parameter value, and send to CPU control unit;
Alternating current carries out rectification by rectification unit, exports direct current;
Described CPU control unit, according to described charging parameter value, controls modulating unit and modulates described direct current, export square or sinusoidal wave charging current to lithium iron battery.
Preferably, the square or sinusoidal wave charging current of described output is connected with described CPU control unit by feedback circuit;
Described charging current, after described CPU control unit calibration, controls described modulating unit and exports the charging current after calibrating to lithium iron battery.
Preferably, the current output interface of charging current comprises the first current output interface and the second current output interface, and described first current output interface is connected with anode, and described second current output interface is connected with battery cathode; If described first current output interface is connected with battery cathode, described second current output interface is connected with anode, then have alarm.
Preferably, after lithium iron battery charges to preset voltage value, charger system stops charging automatically.
Preferably, described charging parameter value comprises charging voltage, charging current and charge frequency;
Be less than the first end value of preset charge voltage scope when described charging voltage or be greater than the second end value of described preset charge voltage scope, described CPU control unit controls the first end value or the second end value that described charging voltage equals described preset charge voltage scope;
Be less than the first end value of preset charged current range when described charging current or be greater than the second end value of described preset charged current range, described CPU control unit controls the first end value or the second end value that described charging current equals described preset charged current range;
When described charge frequency is less than the first end value of preset charged frequency range or is greater than the second end value of described preset charged frequency range, described CPU control unit controls the first end value or the second end value that described charge frequency equals described preset charged frequency range.
As shown from the above technical solution, a kind of novel pulsed lithium iron battery charger system that the present invention proposes and charging method, the electric charge receptance of lithium iron battery can be improved, reduce battery temperature rise in charging process, ensure that each rechargeable battery can reach full state, extend the useful life of battery.
In specification of the present invention, describe a large amount of detail.But can understand, embodiments of the invention can be put into practice when not having these details.In some instances, be not shown specifically known method, structure and technology, so that not fuzzy understanding of this description.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these figure.
The structural representation of a kind of pulsed lithium iron battery charger system that Fig. 1 provides for one embodiment of the invention;
The schematic diagram of the main circuit of a kind of pulsed lithium iron battery charging system that Fig. 2 provides for one embodiment of the invention;
The composition diagram of the front panel control system of a kind of pulsed lithium iron battery charging system that Fig. 3 provides for one embodiment of the invention;
The flow chart of a kind of pulsed lithium iron battery charging method that Fig. 4 provides for one embodiment of the invention.
Embodiment
Below in conjunction with accompanying drawing, the embodiment of invention is further described.Following examples only for technical scheme of the present invention is clearly described, and can not limit the scope of the invention with this.
Fig. 1 shows the structural representation of a kind of pulsed lithium iron battery charger system that the present embodiment provides, and comprises main circuit 100, front panel control system 200 and input/output interface 300; Described main circuit 100 comprises rectification unit 101, modulating unit 102 and CPU control unit 103;
Described rectification unit 101 is all connected with described modulating unit 102 with described CPU control unit 103;
Described CPU control unit 103 is connected with described front panel control system 200;
Described rectification unit 101 is all connected with described input/output interface 300 with described modulating unit 102;
Described front panel control system 200 is for arranging charging parameter value; Described main circuit 100 for alternating current is converted to direct current, and is modulated described direct current according to described charging parameter value; Described input/output interface 300 is for exporting charging current.
Wherein, as shown in Figure 2, described rectification unit 101, for carrying out rectification to input AC civil power, obtains direct voltage; Described modulating unit 102 is for modulating direct voltage; Described CPU control unit 103 is for controlling modulating unit, obtain satisfactory charging current, when output voltage or electric current are outside preset range, described CPU control unit 103 controls described modulating unit 102 automatically, makes it equal immediate preset range end value; Wherein said CPU control unit 103 is connected with front panel control system, facilitates user to control described modulating unit 102 intuitively.
The present embodiment can by the described adjustment of front panel control system charging voltage, electric current, frequency and waveform, to improve lithium iron battery receptance, thus increase lithium iron battery electricity absorptivity, realize lithium iron battery pulsed large current charge, reduce the temperature rise of charging process battery; Eliminate sulfation, extend the useful life of battery.
As the preferred version of the present embodiment, as shown in Figure 3, described front panel control system 200 comprises pressure regulation acknowledgement key, voltage regulating knob, electric current adjustment knob, frequency adjustment knob, waveform switch knob, output switch, voltage display screen, electric current display screen and frequency display screen; Described input/output interface comprises power input interface, voltage acquisition interface and current output interface.
Wherein, described power input interface is used for providing working power for pulsed lithium iron battery charger system; Described voltage acquisition interface is used for being connected with lithium iron battery to be charged by adopting line outside voltage and charging; Described current output interface is used for providing charging current for lithium iron battery to be charged, is the working cell of pulsed lithium iron battery charger system.Described pressure regulation acknowledgement key is used for confirming adjustment voltage, after each adjustment voltage knob, all needs to press pressure regulation acknowledgement key and confirms voltage setting value.All display screens all adopt industrial LED display, and data are more clear, simple user-interface design, guarantee user operation simple, intuitive.Total interface all adopts standard interface to design, and makes wiring intuitive and convenient more.Further, described pressure regulation acknowledgement key, described voltage regulating knob, described electric current adjustment knob, described frequency adjustment knob, described waveform switch knob are all connected with described CPU control unit 103 with described output switch, user is according to lithium iron battery specification to be charged, setting output voltage, output current, output frequency and output waveform, thus change the parameter of described CPU control unit 103, and then described modulating unit 102 is controlled.Described voltage display screen is connected with described voltage regulating knob; Described electric current display screen is connected with described electric current adjustment knob; Described frequency display screen is connected with described frequency adjustment knob.Wherein, described pressure regulation acknowledgement key is used for the confirmation to adjustment voltage, after each adjustment voltage knob, all needs to press pressure regulation acknowledgement key and confirms voltage setting value.Described voltage regulating knob, described electric current adjustment knob, described frequency adjustment knob, described waveform switch knob are used for controlling modulating unit according to lithium iron battery specification to be charged, adjustment output voltage, output current, output frequency and output waveform; Wherein voltage regulating knob, electric current adjustment knob, frequency adjustment knob turn clockwise be strengthen parameter value, be rotated counterclockwise be reduce parameter value, parameter value can be changed at any time in the course of the work.
The principle of the method specific implementation that the present embodiment provides is as follows: by the power interface of one end of working power line access charger, after the other end is connected with alternating current 220V/50Hz power supply, described rectification unit 101 pairs of input ac voltages of the described main circuit 100 of pulsed lithium iron battery charger system inside carry out rectification, will obtain direct voltage output to described modulating unit 102.The 102 pairs of direct voltage modulation of described modulating unit, export the square wave for charging or sine wave.According to specification and the charging requirement of lithium iron battery to be charged, the described voltage regulating knob of described front panel control system 200, described electric current is regulated to adjust the numerical value of knob, described frequency adjustment knob and described waveform switch knob, thus change the related parameter values of the described CPU control unit 103 be connected with its logic, carry out controlling to described modulating unit 102 and adjust, thus obtain corresponding charging current, complete charging.In order to calibrate modulation signal, be provided with the feedback loop to modulation module at internal circuit.
Further, described current output interface comprises the first current output interface and the second current output interface, and described first current output interface is connected with lithium iron battery positive pole, and described second current output interface is connected with lithium iron battery negative pole.Described voltage acquisition interface first end is connected with lithium iron battery positive pole, and described voltage acquisition interface second end is connected with lithium iron battery negative pole.Specific implementation step is as follows:
The red output of charger current output interface is received lithium iron battery positive pole, and black output receives lithium iron battery negative pole.Forbid reversal connection in wiring process, after reversal connection, have alarm.
One end of voltage acquisition interface is connect lithium iron battery positive pole by adopting line outside voltage, and the other end connects lithium iron battery negative pole by adopting line outside voltage, 1 pin be voltage just, 3 pin are voltage negative.
By the power interface of one end of working power line access charger, the other end is connected with alternating current 220V/50Hz power supply.
Closing Switch, charger system internal main circuit rectifies unit 101 pairs of electric mains carry out rectification, direct voltage modulation exports by modulating unit 102, according to lithium iron battery specification to be charged, pressure regulation acknowledgement key is pressed, voltage, electric current, frequency, the waveform knob of adjustment front panel control system 200, change the parameter of connected CPU control unit, controls modulating unit adjustment output voltage, output current, output waveform and frequency.When battery reaches the magnitude of voltage of setting, charger will stop charging automatically.
Fig. 4 shows the flow chart of a kind of pulsed lithium iron battery charging method that the present embodiment provides, and comprises the following steps:
The lithium iron battery charging specification that S1, basis are preset and charging requirement, by front panel set-up of control system charging parameter value, and send to CPU control unit;
S2, alternating current carry out rectification by rectification unit, export direct current;
S3, described CPU control unit, according to described charging parameter value, control modulating unit and modulate described direct current, export square or sinusoidal wave charging current to lithium iron battery.
The pulsed lithium iron battery charging method that the present embodiment provides, by the adjustment of adjustment unit, can realize lithium iron battery pulsed large current charge, eliminates sulfation, extends the useful life of battery; Accurately detect voltage, electric current by CPU control unit, control precision is high, ensures not overvoltage/undervoltage, excessively undercurrent, has overvoltage/undervoltage, overload protection function, and have current-sharing, thin,tough silk stream auto-conversion function.The temperature rise of charging process battery can be reduced during large current charge simultaneously, lithium iron battery receptance can be improved, increase lithium iron battery electricity absorptivity.
Further, the square or sinusoidal wave charging current of described output is connected with described CPU control unit by feedback circuit; Described charging current, after described CPU control unit calibration, controls described modulating unit and exports the charging current after calibrating to lithium iron battery.
Further, the current output interface of charging current has and comprises the first current output interface and the second current output interface, and described first current output interface is connected with anode, and described second current output interface is connected with battery cathode; If described first current output interface is connected with battery cathode, described second current output interface is connected with anode, then have alarm.By built-in protection apparatus preventing reverse connection, improve the fail safe that charger system uses.
For example, after lithium iron battery charges to preset voltage value, charger system stops charging automatically, makes whole charging process full-automatic intelligent, and automation is charged, and is full of rear autostop.
Particularly, described charging parameter value comprises charging voltage, charging current and charge frequency;
Be less than the first end value of preset charge voltage scope when described charging voltage or be greater than the second end value of described preset charge voltage scope, described CPU control unit controls the first end value or the second end value that described charging voltage equals described preset charge voltage scope;
Be less than the first end value of preset charged current range when described charging current or be greater than the second end value of described preset charged current range, described CPU control unit controls the first end value or the second end value that described charging current equals described preset charged current range;
When described charge frequency is less than the first end value of preset charged frequency range or is greater than the second end value of described preset charged frequency range, described CPU control unit controls the first end value or the second end value that described charge frequency equals described preset charged frequency range.
The concrete technical parameter of the pulsed lithium iron battery charger system described in this embodiment is as shown in the table.
| Charge voltage range | 1.5～5V |
| Charging current scope | 0～60A |
| Frequency-tuning range | 50～2KHZ |
| Output waveform | Square wave/sine wave |
| Charging voltage precision | 0.1％ |
| Voltage resolution | 0.001V |
| Charging current precision | 0.50％ |
| Current resolution | 0.01A |
| FREQUENCY CONTROL precision | 0.1％ |
| Frequency resolution | 0.1HZ |
| Working power | 220V/50HZ |
Claims (10)
1. a pulsed lithium iron battery charger system, is characterized in that, comprises main circuit, front panel control system and input/output interface; Described main circuit comprises rectification unit, modulating unit and CPU control unit;
Described rectification unit is all connected with described modulating unit with described CPU control unit;
Described CPU control unit is connected with described front panel control system;
Described rectification unit is all connected with described input/output interface with described modulating unit;
Described front panel control system is used for arranging charging parameter value; Described main circuit is used for alternating current to be converted to direct current, and modulates described direct current according to described charging parameter value; Described input/output interface is for exporting charging current.
2. system according to claim 1, it is characterized in that, described front panel control system comprises pressure regulation acknowledgement key, voltage regulating knob, electric current adjustment knob, frequency adjustment knob, waveform switch knob, output switch, voltage display screen, electric current display screen and frequency display screen;
Described pressure regulation acknowledgement key, described voltage regulating knob, described electric current adjustment knob, described frequency adjustment knob, described waveform switch knob are all connected with described CPU control unit with described output switch;
Described voltage display screen is connected with described voltage regulating knob;
Described electric current display screen is connected with described electric current adjustment knob;
Described frequency display screen is connected with described frequency adjustment knob;
Described pressure regulation acknowledgement key is used for confirming adjustment voltage.
3. system according to claim 1, is characterized in that, described input/output interface comprises power input interface, voltage acquisition interface and current output interface;
Described power input interface is used for providing working power for pulsed lithium iron battery charger system;
Described voltage acquisition interface is used for being connected with lithium iron battery to be charged by adopting line outside voltage and charging;
Described current output interface is used for providing charging current for lithium iron battery to be charged.
4. system according to claim 3, it is characterized in that, described current output interface comprises the first current output interface and the second current output interface, and described first current output interface is connected with lithium iron battery positive pole, and described second current output interface is connected with lithium iron battery negative pole.
5. system according to claim 3, is characterized in that, described voltage acquisition interface first end is connected with lithium iron battery positive pole by adopting line outside voltage, and described voltage acquisition interface second end is connected with lithium iron battery negative pole by adopting line outside voltage.
6. a pulsed lithium iron battery charging method, is characterized in that, comprising:
According to the lithium iron battery charging specification preset and charging requirement, by front panel set-up of control system charging parameter value, and send to CPU control unit;
Alternating current carries out rectification by rectification unit, exports direct current;
Described CPU control unit, according to described charging parameter value, controls modulating unit and modulates described direct current, export square or sinusoidal wave charging current to lithium iron battery.
7. method according to claim 6, is characterized in that, the square or sinusoidal wave charging current of described output is connected with described CPU control unit by feedback circuit;
Described charging current, after described CPU control unit calibration, controls described modulating unit and exports the charging current after calibrating to lithium iron battery.
8. method according to claim 7, it is characterized in that, the current output interface of charging current comprises the first current output interface and the second current output interface, and described first current output interface is connected with anode, and described second current output interface is connected with battery cathode; If described first current output interface is connected with battery cathode, described second current output interface is connected with anode, then have alarm.
9. method according to claim 7, is characterized in that, after lithium iron battery charges to preset voltage value, charger system stops charging automatically.
10. method according to claim 6, is characterized in that, described charging parameter value comprises charging voltage, charging current and charge frequency;
Be less than the first end value of preset charge voltage scope when described charging voltage or be greater than the second end value of described preset charge voltage scope, described CPU control unit controls the first end value or the second end value that described charging voltage equals described preset charge voltage scope;
Be less than the first end value of preset charged current range when described charging current or be greater than the second end value of described preset charged current range, described CPU control unit controls the first end value or the second end value that described charging current equals described preset charged current range;
When described charge frequency is less than the first end value of preset charged frequency range or is greater than the second end value of described preset charged frequency range, described CPU control unit controls the first end value or the second end value that described charge frequency equals described preset charged frequency range.
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