CN203813474U - Charging system for power battery - Google Patents
Charging system for power battery Download PDFInfo
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- CN203813474U CN203813474U CN201420150482.4U CN201420150482U CN203813474U CN 203813474 U CN203813474 U CN 203813474U CN 201420150482 U CN201420150482 U CN 201420150482U CN 203813474 U CN203813474 U CN 203813474U
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Abstract
The utility model relates to the technical field of battery charging, and specifically relates to a charging system for a power battery. The charging system for the power battery comprises a controller, a voltage detection unit, micro chargers and battery charging sockets, the controller is connected the control terminals of the micro chargers, each micro charger is connected with the power supply terminal of one battery charging socket, the detection terminal of the voltage detection unit is connected with the power supply terminals, and the output terminal of the voltage detection unit is connected with the controller. The charging system for the power battery can charge a battery pack with electricity in different modes, and the charging effect is good; aiming at different capacities of batteries, the charging system for the power battery can charge the batteries in balance, and the service life of the batteries is prolonged.
Description
Technical field
The utility model relates to charging technique field, specifically, relates to a kind of charging system of electrokinetic cell.
Background technology
The type of electrokinetic cell comprises lithium ion battery, lead-acid battery and Ni-MH battery.Wherein lithium ion battery, because its specific energy is high, is widely used in electric automobile, electric boat, and the fields such as electric robot, play energy savings, the effect of protection of the environment.In view of the extensive use of electrokinetic cell, there are on the market much the micro-chargers for power battery charging, and this slightly charger generally only adopt the pattern of constant current charge or constant voltage charge, be unfavorable for the use of electrokinetic cell, reduce its useful life.
Summary of the invention
The purpose of this utility model is to solve the deficiencies in the prior art, and a kind of charging system of electrokinetic cell is provided, and this charging system can regulate for the charged state of battery, extends the useful life of battery.
For achieving the above object, the technical solution adopted in the utility model is:
A kind of charging system of electrokinetic cell, comprise controller, voltage detection unit, micro-charger and cell-charging seat, controller is connected with the control end of micro-charger, micro-charger is connected with the power end of cell-charging seat, the test side of voltage detection unit is connected with described power end, and the output of voltage detection unit is connected with controller.
The utility model detects rechargeable battery both end voltage by voltage detection unit, and voltage signal is fed back to controller, and controller is controlled the charge mode of micro-charger according to voltage signal, and then reaches good charging modes, extends the useful life of battery.
The controller here can adopt switching circuit, according to different voltage signals, micro-charger is sent to different current signals.Micro-charger carries out constant current or constant voltage charge according to current signal to rechargeable battery.
Further, described charging system comprises a plurality of micro-chargers and a plurality of cell-charging seat, and micro-charger is corresponding one by one with cell-charging seat.
Electrokinetic cell in use, is generally the mode that adopts a plurality of electrokinetic cell series connection, therefore, when battery pack is charged, need to charge to each electrokinetic cell.Therefore design a plurality of micro-chargers and cell-charging seat.Secondly, when power battery pack is used on motor vehicle, because electrokinetic cell may occur that model differs, therefore need independent charging, avoid serial connection charge can cause part electrokinetic cell to occur the phenomenon of supplying power for outside, have influence on the life-span of electrokinetic cell.
Further, described charging system also comprises voltage detection unit, and the test side of voltage detection unit is connected with each cell-charging seat respectively, and the output of voltage detection unit is connected with controller,
Because the model of electrokinetic cell differs, therefore may cause the electric weight storage of electrokinetic cell to differ, when the power battery charging to different model, need to consider its harmony.This Time Controller is provided with chip, for analyzing, the charge mode of power battery charging is controlled; Make the electric weight of each electrokinetic cell in battery pack at equilibrium, avoid electrokinetic cell in use, occur part electrokinetic cell not supplying power for outside, in charged state.When concrete operations, by voltage detection unit, detect the voltage of each rechargeable battery, and then play the charged state that monitors each rechargeable battery, charged state feeds back to controller by current signal, and controller is controlled the charge mode of micro-charger again.Voltage detection unit can adopt voltage detecting circuit.
Further, described charging system also comprises heat control system, and heat control system comprises fan and temperature sensor, and temperature sensor is arranged at cell-charging seat, and the output of temperature sensor is connected with controller, and controller is connected with the control end of fan.
Heat control system is set, and the temperature while charging for controlling battery, can generate heat during battery charging, and heating can cause the resistance variations of battery and inner material to change; Thereby have influence on charging effect; Therefore need to control the heating temp of battery.
Further, micro-charger comprises AC/DC module, inverse-excitation type switch power-supply circuit and the synchronous rectification BUCK circuit connecting successively;
AC/DC module is electrically connected to city, and civil power is transferred to the direct current of low pressure; And direct current is transferred to inverse-excitation type switch power-supply circuit;
Inverse-excitation type switch power-supply circuit carries out step-down processing to the electric current of AC/DC module output; By the current delivery after step-down to synchronous rectification BUCK circuit;
The electric current of synchronous rectification BUCK circuit after to step-down carries out rectification processing, to battery output constant current or constant voltage electricity.
AC/DC module can adopt half-wave rectifying circuit.
Further, described inverse-excitation type switch power-supply circuit comprises transformer, and transformer comprises primary coil and secondary coil; The current input terminal of primary coil is connected with the output of AC/DC module, also comprises inverse-excitation type switch power-supply controller, and inverse-excitation type switch power-supply controller receives the control signal that controller sends, and controls the break-make of inverse-excitation type switch power-supply circuit;
The input of synchronous rectification BUCK circuit is connected with the current output terminal of secondary coil, and the output of synchronous rectification BUCK circuit is connected with cell-charging seat.
The AC/DC module of micro-charger is carried out rectification to civil power, output direct current; By transformer, carry out step-down again, the electric current after step-down, outputs to the battery of cell-charging seat through synchronous rectification BUCK circuit.
Further, inverse-excitation type switch power-supply circuit also comprises the first photoelectrical coupler and logic controller; Inverse-excitation type switch power-supply controller receives the control signal of self-controller successively by logic controller, the first photoelectrical coupler.
Further, between the primary coil of described transformer and inverse-excitation type switch power-supply controller, be provided with switching tube, the first current sampling circuit, the current output terminal of the secondary coil of described transformer is connected with inverse-excitation type switch power-supply controller by rectification circuit, the first voltage sampling circuit, the second photoelectrical coupler successively; The current output terminal of primary coil is connected with the D utmost point of switching tube, the G utmost point of switching tube is connected with inverse-excitation type switch power-supply controller, the input of the first current sampling circuit is connected with the S utmost point of switching tube, and the output of the first current sampling circuit is connected with the current feedback terminal of inverse-excitation type switch power-supply controller;
The first current sampling circuit gathers the electric current of transformer primary side coil, and this current signal is fed back to inverse-excitation type switch power-supply controller;
The first voltage sampling circuit gathers the voltage after the rectification of transformer secondary coil, just by this voltage signal through the second photoelectrical coupler electrical isolation formation voltage induced signal, voltage induced signal passes to inverse-excitation type switch power-supply controller;
Inverse-excitation type switch power-supply controller sends PWM according to the current signal receiving, voltage induced signal to the G utmost point of switching tube and drives signal, realizes the break-make of reaction type switching power circuit.
Again further, the two ends of described transformer primary side coil are connected with the first absorbing circuit respectively; The D utmost point of switching tube is connected with the second absorbing circuit respectively with the S utmost point; The first absorbing circuit is for absorbing the energy of transformer primary side coil leakage inductance; The second absorbing circuit is for absorbing the energy of the due to voltage spikes of switching tube shutdown moment generation.
Further, described synchronous rectification BUCK circuit comprises rectification module, synchronous rectifying controller, one-way circuit, second voltage sample circuit, filter circuit, the second current sampling circuit and comparator;
The input of rectification module is connected with the current output terminal of the secondary coil of transformer; Rectification module is connected with the current input terminal of cell-charging seat by filter circuit, one-way circuit successively;
The input of second voltage sample circuit is connected with the output of filter circuit, and the output of second voltage sample circuit is connected with an input of comparator;
The input of the second current sampling circuit is connected with the current output terminal of cell-charging seat, and the output of the second current sampling circuit is connected with another input of comparator;
The output of comparator is connected with the input of synchronous rectifying controller; The output of synchronous rectifier is connected with rectification module.
The beneficial effect that the utility model is obtained is: the utility model, when battery pack is charged, can carry out the charging of different mode to battery, charging effect is good; Secondly can also carry out equilibrium charging for the different capabilities of battery, extend battery.
Accompanying drawing explanation
Fig. 1 is the work schematic diagram of submodule of the present utility model.
Fig. 2 is the formation schematic diagram of micro-charger of the present utility model.
For convenience of understanding, in accompanying drawing, all use battery substituting battery cradle.
Embodiment
Below in conjunction with accompanying drawing 1, to Fig. 2, and embodiment is described further the utility model.
Embodiment: referring to Fig. 1 to Fig. 2.
As shown in Figure 1, a kind of charging system of electrokinetic cell, comprise controller, voltage detection unit, micro-charger and cell-charging seat, controller is connected with the control end of micro-charger, micro-charger is connected with the power end of cell-charging seat, the test side of voltage detection unit is connected with described power end, and the output of voltage detection unit is connected with controller.
The utility model detects rechargeable battery both end voltage by voltage detection unit, and voltage signal is fed back to controller, and controller is controlled micro-charge mode that rushes motor according to voltage signal, and then reaches good charging modes, extends the useful life of battery.Voltage detection unit can adopt voltage collection circuit.
The controller here can adopt switching circuit, according to different voltage signals, micro-charger is sent to different current signals.Micro-charger carries out constant current or constant voltage charge according to current signal to rechargeable battery.
Further, described charging system comprises a plurality of micro-chargers and a plurality of cell-charging seat, and micro-charger is corresponding one by one with cell-charging seat.
Electrokinetic cell in use, is generally the mode that adopts a plurality of electrokinetic cell series connection, therefore, when battery pack is charged, need to charge to each electrokinetic cell.Therefore design a plurality of micro-chargers and cell-charging seat.Secondly, when power battery pack is used on motor vehicle, because electrokinetic cell may occur that model differs, therefore need independent charging, avoid serial connection charge can cause part electrokinetic cell to occur the phenomenon of supplying power for outside, have influence on the life-span of electrokinetic cell.
Further, described charging system also comprises voltage detection unit, and the test side of voltage detection unit is connected with each cell-charging seat respectively, and the output of voltage detection unit is connected with controller,
Because the model of electrokinetic cell differs, therefore may cause the electric weight storage of electrokinetic cell to differ, when the power battery charging to different model, need to consider its harmony.This Time Controller is provided with chip, for analyzing, the charge mode of power battery charging is controlled; Make the electric weight of each electrokinetic cell in battery pack at equilibrium, avoid electrokinetic cell in use, occur part electrokinetic cell not supplying power for outside, in charged state.When concrete operations, by voltage detection unit, detect the voltage of each rechargeable battery, and then play the charged state that monitors each rechargeable battery, charged state feeds back to controller by current signal, and controller is controlled the charge mode of micro-charger again.Voltage detection unit can adopt voltage detecting circuit.
Further, described charging system also comprises heat control system, and heat control system comprises fan and temperature sensor, and temperature sensor is arranged at cell-charging seat, and the output of temperature sensor is connected with controller, and controller is connected with the control end of fan.
Heat control system is set, and the temperature while charging for controlling battery, can generate heat during battery charging, and heating can cause the resistance variations of battery and inner material to change; Thereby have influence on charging effect; Therefore need to control the heating temp of battery.
Further, as shown in Figure 2, described micro-charger comprises AC/DC module, inverse-excitation type switch power-supply circuit and the synchronous rectification BUCK circuit connecting successively.
Further, the input of AC/DC module is electrically connected to city, and the output of AC/DC module is externally exported the electric current of rectangle square wave;
Described inverse-excitation type switch power-supply circuit comprises transformer, and transformer comprises primary coil and secondary coil; The current input terminal of primary coil is connected with the output of AC/DC module, also comprises inverse-excitation type switch power-supply controller, and inverse-excitation type switch power-supply controller receives the control signal that controller sends, the break-make of control switch power supply;
The input of synchronous rectification BUCK circuit is connected with the current output terminal of secondary coil, and the output of synchronous rectification BUCK circuit is connected with cell-charging seat.The current output terminal ground connection of secondary coil.Between the two ends of secondary coil, be connected with electric capacity.
The AC/DC module of micro-charger is carried out rectification to civil power, output direct current; By transformer, carry out step-down again, the electric current after step-down, outputs to the battery of cell-charging seat through synchronous rectification BUCK circuit.
Further, inverse-excitation type switch power-supply circuit also comprises the first photoelectrical coupler and logic controller; Inverse-excitation type switch power-supply controller receives the control signal of self-controller successively by logic controller, the first photoelectrical coupler.
The control signal of controller is isolated by photoelectrical coupler, and the signal that sends work or stop to inverse-excitation type switch power-supply controller through the judgement of logic controller.And then reach the break-make of inverse-excitation type switch power-supply controller control transformer electric current, thereby realize controlling, open or stop micro-machine operation of rushing.
Further, between the primary coil of described transformer and inverse-excitation type switch power-supply controller, be provided with switching tube, the first current sampling circuit, the current output terminal of the secondary coil of described transformer is connected with inverse-excitation type switch power-supply controller by rectification circuit, the first voltage sampling circuit, the second photoelectrical coupler successively; The current output terminal of primary coil is connected with the D utmost point of switching tube, the G utmost point of switching tube is connected with inverse-excitation type switch power-supply controller, the input of the first current sampling circuit is connected with the S utmost point of switching tube, and the output of the first current sampling circuit is connected with the current feedback terminal of inverse-excitation type switch power-supply controller; The rectification circuit here comprises diode and electric capacity, and diode is connected with the current output terminal of the secondary coil of transformer, and the two ends of the electric capacity respectively two ends of the secondary coil of transformer connect.
The first current sampling circuit gathers the electric current of transformer primary side coil, and this current signal is fed back to inverse-excitation type switch power-supply controller; The first current sampling circuit adopts sampling resistor to gather electric current here.
The first voltage sampling circuit gathers the voltage after the rectification of transformer secondary coil, just by this voltage signal through the second photoelectrical coupler electrical isolation formation voltage induced signal, voltage induced signal passes to inverse-excitation type switch power-supply controller;
Inverse-excitation type switch power-supply controller sends PWM according to the current signal receiving, voltage induced signal to the G utmost point of switching tube and drives signal, realizes the break-make of reaction type switching power circuit.
Again further, the two ends of described transformer primary side coil are connected with the first absorbing circuit respectively; The D utmost point of switching tube is connected with the second absorbing circuit respectively with the S utmost point; The first absorbing circuit is for absorbing the energy of transformer primary side coil leakage inductance; The second absorbing circuit is for absorbing the energy of the due to voltage spikes of switching tube shutdown moment generation.
Further, described synchronous rectification BUCK circuit comprises rectification module, synchronous rectifying controller, one-way circuit, second voltage sample circuit, filter circuit, the second current sampling circuit and comparator;
The input of rectification module is connected with the current output terminal of the secondary coil of transformer; Rectification module is connected with the current input terminal of cell-charging seat by filter circuit, one-way circuit successively;
The input of second voltage sample circuit is connected with the output of filter circuit, and the output of second voltage sample circuit is connected with an input of comparator;
The input of the second current sampling circuit is connected with the current output terminal of cell-charging seat, and the output of the second current sampling circuit is connected with another input of comparator;
The output of comparator is connected with the input of synchronous rectifying controller; The output of synchronous rectifier is connected with rectification module.
Wherein, rectification module adopts the form of many group field effect transistor parallel connection, to improve overcurrent capability; One-way circuit can adopt diode, makes the battery can supplying power for outside under charge condition not, the electric energy of consumption own.Current sampling circuit comprises a sampling resistor, by this sampling resistor, converts current signal to voltage signal, and the signal of this signal and Voltage Feedback compares, the feedback pin of comparative result input switch power supply control chip.
Below be only the application's preferred embodiment, equivalent technical solutions on this basis still falls into application protection range.
Claims (10)
1. the charging system of an electrokinetic cell, it is characterized in that: comprise controller, voltage detection unit, micro-charger and cell-charging seat, controller is connected with the control end of micro-charger, micro-charger is connected with the power end of cell-charging seat, the test side of voltage detection unit is connected with described power end, and the output of voltage detection unit is connected with controller.
2. the charging system of a kind of electrokinetic cell according to claim 1, is characterized in that: described charging system comprises a plurality of micro-chargers and a plurality of cell-charging seat, and micro-charger is corresponding one by one with cell-charging seat.
3. the charging system of a kind of electrokinetic cell according to claim 2, it is characterized in that: described charging system also comprises voltage detection unit, the test side of voltage detection unit is connected with each cell-charging seat respectively, and the output of voltage detection unit is connected with controller.
4. the charging system of a kind of electrokinetic cell according to claim 3, it is characterized in that: described charging system also comprises heat control system, heat control system comprises fan and temperature sensor, temperature sensor is arranged at cell-charging seat, the output of temperature sensor is connected with controller, and controller is connected with the control end of fan.
5. the charging system of a kind of electrokinetic cell according to claim 4, is characterized in that: micro-charger comprises AC/DC module, inverse-excitation type switch power-supply circuit and the synchronous rectification BUCK circuit connecting successively;
AC/DC module is electrically connected to city, and civil power is transferred to the direct current of low pressure; And direct current is transferred to inverse-excitation type switch power-supply circuit;
Inverse-excitation type switch power-supply circuit carries out step-down processing to the electric current of AC/DC module output; By the current delivery after step-down to synchronous rectification BUCK circuit;
The electric current of synchronous rectification BUCK circuit after to step-down carries out rectification processing, to battery output constant current or constant voltage electricity.
6. the charging system of a kind of electrokinetic cell according to claim 5, is characterized in that: described inverse-excitation type switch power-supply circuit comprises transformer, and transformer comprises primary coil and secondary coil; The current input terminal of primary coil is connected with the output of AC/DC module, also comprises inverse-excitation type switch power-supply controller, and inverse-excitation type switch power-supply controller receives the control signal that controller sends, and controls the break-make of inverse-excitation type switch power-supply circuit;
The input of synchronous rectification BUCK circuit is connected with the current output terminal of secondary coil, and the output of synchronous rectification BUCK circuit is connected with cell-charging seat.
7. the charging system of a kind of electrokinetic cell according to claim 6, is characterized in that: inverse-excitation type switch power-supply circuit also comprises the first photoelectrical coupler and logic controller; Inverse-excitation type switch power-supply controller receives the control signal of self-controller successively by logic controller, the first photoelectrical coupler.
8. the charging system of a kind of electrokinetic cell according to claim 7, it is characterized in that: between the primary coil of described transformer and inverse-excitation type switch power-supply controller, be provided with switching tube, the first current sampling circuit, the current output terminal of the secondary coil of described transformer is connected with inverse-excitation type switch power-supply controller by rectification circuit, the first voltage sampling circuit, the second photoelectrical coupler successively; The current output terminal of primary coil is connected with the D utmost point of switching tube, the G utmost point of switching tube is connected with inverse-excitation type switch power-supply controller, the input of the first current sampling circuit is connected with the S utmost point of switching tube, and the output of the first current sampling circuit is connected with the current feedback terminal of inverse-excitation type switch power-supply controller;
The first current sampling circuit gathers the electric current of transformer primary side coil, and this current signal is fed back to inverse-excitation type switch power-supply controller;
The first voltage sampling circuit gathers the voltage after the rectification of transformer secondary coil, just by this voltage signal through the second photoelectrical coupler electrical isolation formation voltage induced signal, voltage induced signal passes to inverse-excitation type switch power-supply controller;
Inverse-excitation type switch power-supply controller sends PWM according to the current signal receiving, voltage induced signal to the G utmost point of switching tube and drives signal, realizes the steady operation of reaction type switching power circuit.
9. a micro-charger, is characterized in that: comprise the AC/DC module, inverse-excitation type switch power-supply circuit and the synchronous rectification BUCK circuit that connect successively;
AC/DC module is electrically connected to city, and civil power is transferred to the direct current of low pressure; And direct current is transferred to inverse-excitation type switch power-supply circuit;
Inverse-excitation type switch power-supply circuit carries out step-down processing to the electric current of AC/DC module output; By the current delivery after step-down to synchronous rectification BUCK circuit;
The electric current of synchronous rectification BUCK circuit after to step-down carries out rectification processing, to battery output constant current or constant voltage electricity.
10. a kind of micro-charger according to claim 9, is characterized in that: described inverse-excitation type switch power-supply circuit comprises transformer, and transformer comprises primary coil and secondary coil; The current input terminal of primary coil is connected with the output of AC/DC module, also comprises inverse-excitation type switch power-supply controller, and inverse-excitation type switch power-supply controller receives the control signal that controller sends, and controls the break-make of inverse-excitation type switch power-supply circuit;
The input of synchronous rectification BUCK circuit is connected with the current output terminal of secondary coil, and the output of synchronous rectification BUCK circuit is connected with cell-charging seat; Inverse-excitation type switch power-supply circuit also comprises the first photoelectrical coupler and logic controller; Inverse-excitation type switch power-supply controller receives the control signal of self-controller successively by logic controller, the first photoelectrical coupler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150482.4U CN203813474U (en) | 2014-03-31 | 2014-03-31 | Charging system for power battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420150482.4U CN203813474U (en) | 2014-03-31 | 2014-03-31 | Charging system for power battery |
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| Publication Number | Publication Date |
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| CN203813474U true CN203813474U (en) | 2014-09-03 |
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| CN201420150482.4U Expired - Fee Related CN203813474U (en) | 2014-03-31 | 2014-03-31 | Charging system for power battery |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734282A (en) * | 2015-02-16 | 2015-06-24 | 上海瑞华(集团)有限公司 | Time-division charging control device and method used for purely electric ship |
-
2014
- 2014-03-31 CN CN201420150482.4U patent/CN203813474U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104734282A (en) * | 2015-02-16 | 2015-06-24 | 上海瑞华(集团)有限公司 | Time-division charging control device and method used for purely electric ship |
| CN104734282B (en) * | 2015-02-16 | 2017-03-01 | 上海瑞华(集团)有限公司 | A kind of time-sharing charging control device and method for pure electric ship |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20200331 |