CN102148512A - Charger and charging method thereof - Google Patents
Charger and charging method thereof Download PDFInfo
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- CN102148512A CN102148512A CN2010101149104A CN201010114910A CN102148512A CN 102148512 A CN102148512 A CN 102148512A CN 2010101149104 A CN2010101149104 A CN 2010101149104A CN 201010114910 A CN201010114910 A CN 201010114910A CN 102148512 A CN102148512 A CN 102148512A
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- 238000007600 charging Methods 0.000 title claims abstract description 76
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000001514 detection method Methods 0.000 claims abstract description 102
- 230000000087 stabilizing effect Effects 0.000 claims description 14
- 239000003990 capacitor Substances 0.000 claims description 8
- 238000006243 chemical reaction Methods 0.000 description 20
- 238000010586 diagram Methods 0.000 description 6
- 230000008569 process Effects 0.000 description 5
- 239000002253 acid Substances 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- OJIJEKBXJYRIBZ-UHFFFAOYSA-N cadmium nickel Chemical compound [Ni].[Cd] OJIJEKBXJYRIBZ-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
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- 238000005516 engineering process Methods 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000003086 colorant Substances 0.000 description 1
- 238000010277 constant-current charging Methods 0.000 description 1
- 238000010281 constant-current constant-voltage charging Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The invention provides a charger, which comprises a charging circuit, a controller, an external power supply detection module, a first power supply circuit and a second power supply circuit, wherein the charging circuit charges a battery by utilizing an external power supply; the controller is used for controlling the working of the charger; the external power supply detection module is used for detecting the external power supply; the first and second power supply circuits supply power to the controller; the power supply current of the second power supply circuit is lower than that of the first power supply circuit; both the first and second power supply circuits can obtain electrical energy from the battery, and supply the power to the controller; and when the external power supply detection module does not discover the input of the external power supply, the controller controls the first power supply circuit to be powered off. The charger can save the electrical energy of the battery when the battery is arranged and the input of the external power supply is not detected. In addition, the invention also provides a charging method.
Description
Technical Field
The present invention relates to a charger and a charging method thereof, and more particularly, to a charger and a charging method thereof for saving battery power when a battery is connected to the charger and no commercial power is input.
Background
With the development of technology, the variety of batteries is increasing, and rechargeable batteries, such as nickel-cadmium batteries, lead-acid batteries, lithium batteries, and the like, are developed to meet the needs of different users. However, the service life of the rechargeable battery is limited, and the quality of the charger has a great influence on the service life of the rechargeable battery because the rechargeable battery is often charged by using the charger.
Some existing chargers have many functions, such as determining battery voltage, determining charging current, and determining whether the battery is fully charged. However, after the battery is connected to the chargers, no matter whether commercial power is input or not, the circuit of the charger realizing the above functions starts to work by using the electric energy of the battery, however, if the battery connected to the charger is over-discharged or completely discharged, a large amount of electric energy still can be consumed by the charger after the battery is connected to the charger, and if the charger is not connected to the commercial power for a while, the battery can be seriously damaged, and the service life of the battery is greatly shortened.
Disclosure of Invention
The invention provides a charger and a charging method thereof, which can save the electric energy of a battery when the battery is connected into the charger and no commercial power is input.
In order to achieve the purpose, the technical scheme of the invention is as follows: a charger, comprising: a charging circuit for charging the battery by using an external power supply; the external power supply detection module is used for detecting the input of the external power supply and outputting a detection signal; the controller is used for controlling the charging circuit to work and can receive the detection signal and judge whether the external power supply is input or not according to the detection signal; the first power supply circuit and the second power supply circuit are used for supplying power to the controller, the power supply current of the second power supply circuit is smaller than that of the first power supply circuit, the first power supply circuit and the second power supply circuit can acquire electric energy from the battery to supply power to the controller, and when the controller judges that the external power supply is not input, the controller controls the first power supply circuit to be powered off.
Preferably, the charger further comprises a third power supply circuit, and when the external power supply input exists in the charger, the third power supply circuit obtains the electric energy of the external power supply to supply power to the controller.
Preferably, when the charger starts to charge the battery, the first power supply loop is powered off, and the second power supply loop obtains the electric energy of the external power supply to supply power to the controller.
Preferably, the first power supply circuit has a voltage stabilizing module, which can convert the voltage of the first power supply circuit and supply the voltage to the controller.
Preferably, the second power supply circuit has a resistor and a voltage regulator tube connected in series.
Preferably, the second power supply circuit has a capacitor connected in parallel with the voltage regulator tube and used for supplying power to the controller when the power demand of the controller is increased instantaneously.
Preferably, the charger further comprises a fourth power supply circuit with a button battery, and the fourth power supply circuit supplies the electric energy of the button battery to the controller.
The invention also provides a charging method of a charger, which is used for charging a battery by utilizing an external power supply, the charger is provided with a controller, an external power supply detection module, an electronic switch, a first power supply circuit and a second power supply circuit, wherein the first power supply circuit and the second power supply circuit supply power to the controller, and the power supply current of the second power supply circuit is smaller than the power supply current of the first power supply circuit, and the charging method comprises the following steps: when a battery is loaded into the charger, the first power supply circuit and the second power supply circuit acquire the electric energy of the battery to supply power to the controller; the controller judges whether the battery needs to be charged; when the battery needs to be charged, the controller controls the electronic switch to be closed, and the external power supply detection module detects the input of the external power supply; when the external power supply detection module does not find the input of the external power supply, the controller controls the electronic switch to be switched off, controls the first power supply circuit to be powered off, and only supplies power to the controller through the second power supply circuit; at intervals, the controller is connected with the first power supply circuit once, controls the electronic switch to be closed, and detects whether the external power supply is input or not through the external power supply detection module; when the external power supply detection module detects the input of the external power supply, the charger starts to charge the battery.
Preferably, the charger further includes a charging voltage detection module, which feeds back detection data to the controller, the controller obtains a voltage value of the battery according to the detection data, and the step of determining, by the controller, whether the battery needs to be charged further includes: the controller controls the first power supply circuit to be electrified; the battery voltage detection module detects the battery voltage and feeds back the battery voltage to the controller to detect data;
the controller obtains a battery voltage according to the detection data, and compares the battery voltage with a preset voltage value; when the battery voltage is larger than or equal to the preset voltage value, the controller controls the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller.
And when the voltage of the battery is smaller than the preset voltage value, the controller controls the charger to charge the battery.
Preferably, in the step of detecting whether the external power supply is input once every a period of time, the method further comprises the following substeps: at intervals, the controller switches on the first power supply circuit;
the controller controls the electronic switch to be closed; the external power supply detection module detects whether the external power supply is input; when the external power supply detection module does not detect the input of the external power supply, the controller controls the electronic switch to be switched off; the controller controls the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller.
Compared with the prior art, the charger and the charging method thereof are provided with the first power supply circuit and the second power supply circuit, when the battery is arranged in the charger, the two power supply circuits can obtain electric energy from the battery to supply power to the controller, if no external power supply is input into the charger at the moment, the controller can control the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller. The resistance of the second power supply circuit is large, and the power supply current is small, so that the electric energy consumed by the battery is very little, the battery is prevented from being further overdischarged, and the battery is effectively prevented from being damaged by the charger.
Drawings
The invention is further described with reference to the following figures and embodiments.
Fig. 1 is a schematic view of an operating state of a charger according to a first embodiment;
FIG. 2 is a block diagram of a charging circuit of the charger of FIG. 1;
FIG. 3 is a circuit diagram of the charging circuit of the charger of FIG. 1;
FIG. 4 is a flowchart of the operation of the charger of FIG. 1;
FIG. 5 is a flow chart of a charging method of the charger of FIG. 1;
FIG. 6 is a sub-flowchart of the charging method of FIG. 5 determining whether the battery requires charging;
FIG. 7 is a sub-flowchart illustrating the charging method of FIG. 5 detecting whether an external power input is received;
fig. 8 is a circuit diagram of a charging circuit of a charger according to a second embodiment of the present invention.
Wherein,
100. charger 42, receiving part 70, controller power supply module
10. External power supply 50, conversion module 71 and first power supply circuit
20. Battery 60, controller 72, second power supply circuit
30. Switch module 61, battery voltage detection module 73, third power supply circuit
31. Manual switch 62, charging voltage detection module 74, controlled part
32. Electronic switch 63, clock circuit 75 and voltage stabilizing module
40. External power supply detection module 64, indication module 76 and connection point
41. Light emitting section 65, charging current detection module 77, connection point
78. Current input line 271, first power supply circuit Q1. triode
79. Connection point 272, second supply circuit Q2, Q3 MOS pipe
80. Main power supply line 278. Current input line D1, D2. diodes
200. Charger R1, R2, resistor D3, D4. diode
210. External power supply R3, R4, resistance D5, D9. diode
220. Batteries R5, R6. resistors D6, D7. light emitting diode
230. Switch assembly R7, R8. resistor D8. LED
240. External power supply detection modules R9 and R10, resistor KM. coil
250. Conversion modules R11, R12, resistors C1, C2. capacitors
260. Controller R13, R14, resistor C3, C4, capacitor
270. Controller power supply module R15, R16, resistance Z1. voltage regulator tube
Detailed Description
Referring to fig. 1, a working state of a charger 100 according to a first embodiment of the present invention is schematically shown. The charger 100 may charge the battery 20 using the external power source 10.
The external power source 10 may be an ac power source or a dc power source, and the power source may be electric power generated by commercial power or other commercial or civil power generators.
The battery 20 is a rechargeable battery such as: nickel-cadmium batteries, lithium batteries, lead-acid batteries, nickel-hydrogen batteries, and the like, and in the present embodiment, it is a lead-acid battery.
It is to be understood that the battery 20 is not limited to a single battery in a general sense, and includes a battery pack having a plurality of batteries.
Please refer to fig. 2, which is a schematic block diagram of a charging circuit of the charger 100. The charging circuit of the charger 100 has a main power supply line 80 connected to the external power source 10 and the battery 20, and the main power supply line 80 has a switch assembly 30, an external power source detection module 40, a conversion module 50, a controller 60 and a controller power supply module 70. The switch assembly 30 controls the connection of the charger 100 and the external power supply 10, and the external power supply detection module 40 is connected to the switch assembly 30, detects whether the external power supply 10 is input, and can send a detection signal to the controller 60. The conversion module 50 can convert the voltage inputted from the external power source 10 into a voltage suitable for the operation of the charger 100. The controller 60 controls the charger 100 to charge the battery 20, and has a sleep state and an operation state. The controller power supply module 70 obtains the electric energy of the external power source 10 or the battery 20 to supply power to the controller 60, and meets the power consumption requirements of different sleep states and working states.
Fig. 3 is a circuit diagram of a charging circuit of the charger 100. The switch assembly 30 is disposed near the position where the main power supply line 80 is connected to the external power source 10, and includes a manual switch 31 and an electronic switch 32 connected in parallel.
The manual switch 31 is a non-self-locking mechanical switch, when the manual switch 31 is pressed, the connected circuit is conducted, and when the applied external force is removed, the manual switch 31 is automatically disconnected.
The electronic switch 32 may be a relay, a transistor, or other controllable electronic components with on/off functions, and in this embodiment, it is a relay. The relay mainly comprises a coil KM, a triode Q1, a resistor R11 and a resistor R12. The transistor Q1 is an NPN transistor having a base connected to the controller 60 through a resistor R11. Resistor R12 is connected in parallel with the base and emitter of transistor Q1. The coil KM is electrically connected to the collector of the transistor Q1 and to the controller power supply module 70.
When the controller 60 controls the electronic switch 32 to be closed, a high level is provided for the base of the triode Q1, so that the triode Q1 is conducted, the coil KM generates magnetic force, the relay is attracted, and the circuit connected with the relay is conducted.
The external power detection module 40 is used for detecting whether the power of the external power supply 10 is input, is connected to the switch assembly 30 and the controller 60, and is capable of sending a detection signal to the controller 60. The external power detection module 40 may be a sampling circuit, an optical coupler power detection circuit, or a detection circuit composed of a plurality of resistors, and in this embodiment, it is an optical coupler power detection circuit. The external power detection module 40 includes a light emitting portion 41 and a receiving portion 42, the light emitting portion 41 includes a light emitting diode D8 and a diode D9 which are connected in parallel and in opposite directions, and is connected to the switch assembly 30 through a resistor R13, and when the switch assembly 30 is turned on and the external power source 10 inputs power, the light emitting portion 41 emits light. The receiving portion 42 is a photo transistor, which receives the light and conducts to send a detection signal to the controller 60.
The conversion module 50 is disposed in the main power supply line 80, and converts the voltage input by the external power supply 10 through the main power supply line 80, so as to be suitable for charging the battery 20. The conversion module 50 may be an AC/DC conversion circuit, may also be a DC/DC conversion circuit, and may also have both an AC/DC conversion circuit and a DC/DC conversion circuit.
It is understood that the conversion module 50 may also be configured to perform constant current charging and constant voltage charging of the battery 20, which will not be described in detail herein due to the space limitation and the well-known technology in the art.
The controller power supply module 70 includes a first power supply circuit 71, a second power supply circuit 72, and a third power supply circuit 73. When the external power supply 10 is not input, the first power supply circuit 71 can obtain the electric energy of the battery 20 to supply power to the controller 60 under the control of the controller 60, the second power supply circuit 72 directly obtains the electric energy of the battery 20 to supply power to the controller 60, and the third power supply circuit 73 cannot supply power to the controller 60; when the external power source 10 is input, the controller 60 only has the external power source 10 as the power source.
The first power supply circuit 71 and the second power supply circuit 72 have the same current input line 78, and the current input line 78 is electrically connected to the main power supply line 80 to form a connection point 79, and the connection point 79 is located at a position of the main power supply line 80 close to the battery 20, and a diode D1 is disposed between the connection point 79 and the conversion module 50 to prevent the current of the battery 20 from flowing into the conversion module 50.
The first power supply circuit 71 mainly includes a controlled module 74 and a voltage regulator module 75. The controlled module 74 is configured to receive control of the controller 60, so that the first power supply circuit 71 has two states, namely, an on state and an off state, and further, whether the first power supply circuit 71 supplies power to the controller 60 is controlled.
The controlled module 74 includes a resistor R4, a MOS transistor Q3, a capacitor C1, a resistor R2, a resistor R1, and a MOS transistor Q2. The MOS transistor Q3 is connected with the capacitor C1 in parallel and then connected with the grid of the MOS transistor Q2, the grid of the MOS transistor Q3 is connected with the controller 60 through the resistor R4, and the resistor R1 is connected with the source and the grid of the MOS transistor in parallel. At the moment when the battery 20 is connected to the charger 100, since the capacitor C1 is charged as a short circuit, the current can flow through the resistor R1 to provide a turn-on voltage for the MOS transistor Q2, so that the MOS transistor Q2 is turned on, the first power supply circuit 71 is in a powered state, and the current enters the controller 60 through the voltage stabilizing module 75, at this time, the controller 60 provides a voltage to the gate of the MOS transistor Q3 to turn on, so as to maintain the powered state of the first power supply circuit 71. When the first power supply circuit 71 needs to enter the power-off state, the controller 60 stops supplying the voltage to the MOS transistor Q3, the controlled module 74 no longer forms a path, the gate of the MOS transistor Q2 no longer has a voltage input, the current cannot pass through the MOS transistor Q3, and the first power supply circuit 71 is in the power-off state.
It is understood that the MOS transistors Q2, Q3 may be replaced by other electronic components with circuit on/off control, such as transistors, relays, etc., which are not specifically illustrated but are covered by the scope of the present invention as long as the functions and effects achieved by the MOS transistors Q2, Q3 are the same or similar to the present invention.
The voltage stabilizing module 75 is a DC/DC conversion circuit that converts the voltage of the first power supply circuit 71 into a DC voltage suitable for the controller 60 and supplies the DC voltage to the controller 60. When the external power source 10 is not input, the first power supply circuit 71 obtains the electric energy of the battery 20 to supply power to the controller 60, and the voltage stabilizing module 75 reduces the voltage input by the battery 20 to be suitable for the controller 60, and can continuously and stably maintain the output of the voltage. In the present embodiment, if the voltage of the battery 20 is 28V and is continuously decreased, and the operating voltage of the controller 60 is 5V, the voltage stabilizing module 75 decreases the voltage provided by the battery 20 to 5V, and then provides the voltage to the controller 60. When the external power source 10 is input, since the voltage of the dc power converted and output by the conversion module 50 may be too high, if the controller 60 is directly powered, the controller 60 may be burnt, and at this time, the voltage stabilizing module 75 may reduce the voltage of the current output by the conversion module 50 and make the current more stable, so as to be suitable for supplying power to the controller 60.
Only one resistor R10 is provided in the second power supply circuit 72, and the load carrying capacity of the second power supply circuit 72 is smaller than that of the first power supply circuit 71, i.e., the first power supply circuit 71 is able to drive more circuit elements. The resistor R10 can be set to 1M, 1.5M, 2M, etc., and in this embodiment, its resistance is 1M. The second power supply circuit 72 and the first power supply circuit 71 have a connection point 76, and the two are connected to a power input terminal of the controller 60. The connection point 76 is located between the regulator module 75 and the controller 60, and in order to prevent current from flowing to the regulator module 75 when the first power supply circuit 71 is in the power-off state, a diode D5 is provided between the connection point 76 and the regulator module 75.
When the controller 60 is powered by only the second power supply circuit 72, since the power supply current is small and not stable enough, the controller 60 does not perform data comparison or judgment, and can enter and maintain the sleep state, and when the controller is awakened, the controlled module 74 can be controlled to enable the first power supply circuit 71 to enter the power-on state, so as to control the electronic switch 32 to be closed.
It can be understood that, in order to make the second power supply circuit 72 supply power to the controller 60 more stably and prevent the controller 60 from being burnt out due to the overhigh instantaneous voltage in the second circuit, a voltage regulator tube Z1 may be connected at the connection point 76, at this time, the second power supply circuit 72 supplies power to the controller 60 through the resistor R10 and the voltage regulator tube Z1 in series, because the resistor R10 prevents the voltage from being large and generates a large voltage drop, the output voltage of the voltage regulator tube Z1 is smaller than the rated voltage thereof, so that the current flowing to the controller 60 is small and stable. In addition, the second power supply circuit 72 is provided with a capacitor C2 in parallel with the voltage regulator tube Z1, so that the requirement of sudden increase of the electric energy demand in the moment when the controller 60 is awakened from the sleep state is met, and the controller 60 is prevented from being halted due to insufficient power supply.
The third power supply circuit 73 is capable of supplying power to the controller 60 by using the power of the external power source 10, and is directly connected to the main power supply line 80, and the connection point is located at a portion after the external power is converted into the dc power by the conversion module 50.
In order to optimize the circuit, the third power supply circuit 73 and the first power supply circuit 71 may share one voltage stabilizing module 75, that is, the first power supply circuit 71 is connected to the third power supply circuit 73 and then connected to the voltage stabilizing module 75, so as to form a connection point 77, and a diode D3 is disposed at a position of the first power supply circuit 71 close to the connection point 77, and a diode D2 is disposed at a position of the third power supply circuit 73 close to the connection point 77, so as to limit the direction of the current, and prevent the current of the third power supply circuit 73 from flowing into the first power supply circuit 71, or the current of the first power supply circuit 71 from flowing into the third power supply circuit 73. To prevent the voltage regulator module 75 from being burned out by excessive current in the circuit at the instant of circuit connection, a resistor R9 may be provided between the connection point 77 and the voltage regulator module 75 to protect the voltage regulator module 75.
It is understood that the conversion module 50 may have two positive output terminals, and the output voltages of the two output terminals are different, one is suitable for charging the battery 20, and the other is suitable for supplying power to the controller 60, and the third power supply circuit 73 is directly connected to the output terminal of the conversion module 50 for supplying power to the controller 60, so that the third power supply circuit 73 may not be connected to the voltage stabilizing module 75, and directly supplies power to the controller 60.
The first power supply circuit 71, the second power supply circuit 72 and the third power supply circuit 73 supply power to the controller 60 as shown in the following table one.
When no external power source 10 and no battery 20 are connected to the charger 100 as in serial No. 1, the charger 100 does not perform any operation; if serial numbers 2 and 3 indicate that the external power source 10 is connected and the battery 20 is not available, the controller 60 does not control to turn on the electronic switch 32, and at this time, the manual switch 31 is turned on to supply power to the controller 60 through the third power supply circuit 73, but the controller 60 does not operate because the battery 20 is not found.
As shown in serial numbers 4, 5, 6, 7 and 8, when the external power supply 10 is not connected and the battery 20 is installed in the charger 100, the first power supply circuit 71 and the second power supply circuit 72 both supply power to the controller 60 (e.g. serial number 4), and the supply current of the first power supply circuit 71 is greater than the supply current of the second power supply circuit 72, the controller 60 determines whether the battery 20 needs to be charged, when charging is not needed, the controller 60 does not control the electronic switch 32 to be turned on, when the battery 20 needs to be charged (e.g. serial number 5), the controller 60 controls the electronic switch 32 to be turned on, and detects whether the input of the external power supply 10 exists through the external power supply detection module 40, at this time, if the input of the external power supply 10 is not found, the controller 60 turns off the first power supply circuit 71 (e.g. serial number 6), and turns off the electronic switch 32, and only the second. The controller 60 turns on the first power supply circuit 71 once every interval and controls the electronic switch 32 to turn on once (e.g., serial No. 7), so as to determine whether the external power source 10 is input.
As shown in the serial number 8, when the input of the external power source 10 is detected, the electronic switch 32 is controlled to be turned on, and the charger 100 is controlled to start charging the battery 20, at which time the third power supply circuit 73 is turned on and supplies power to the controller 60. Due to the length of the line, the voltage of the third power supply circuit 73 at the connection point 77 is higher than the voltage of the first power supply circuit 71, and therefore, the first power supply circuit 71 does not supply power to the controller 60 any more after the third power supply circuit 73 is turned on.
As shown in the serial number 9, when the battery 20 is fully charged, the controller 60 controls the electronic switch 32 to be turned off, and at this time, the controller 60 is only powered by the second power supply circuit 72, so that the charger 100 does not consume the power of the external power supply 10, and because the power supply current of the second power supply circuit 72 is small, the power consumed by the battery 20 is very small, thereby achieving the purpose that the whole charger 100 saves power very much.
As shown in the serial number 10, after the battery 20 is fully charged, the controller 60 controls the first power supply circuit 71 to be turned on once every certain time interval, at this time, the controller 60 determines whether the battery 20 needs to be charged, and repeats the above functions if necessary, and controls the first power supply circuit 71 to stop supplying power if not necessary.
As shown in the serial number 11, when the external power source 10 and the battery 20 are both connected to the charger 100, and the controller 60 does not charge the battery 20 accordingly, if the manual switch 31 is turned on, the charger 100 immediately starts charging the battery 20 and controls the electronic switch 32 to be turned on, thereby implementing the function of quick response charging. If the battery 20 is loaded into the charger 100 and is over-discharged or even completely discharged, it may not have enough power to complete the functions of serial nos. 7 and 8, that is, the controller 60 cannot provide enough power to turn on the electronic switch 32, at this time, if the manual switch 31 is not closed, the charger 100 cannot start charging the battery 20, if the manual switch 31 is closed, the external power source 10 supplies power to the controller 60 through the third power supply circuit 73, so that the controller 60 can control to turn on the electronic switch 32, and even if the manual switch 31 is turned off at this time, the power enters the third power supply circuit 73 from the electronic switch 32, so as to ensure that the controller 60 is powered, and thus, the whole charger 100 can charge the battery 20.
It is understood that the charger 100 may further have a fourth power supply circuit, which has a button battery, and supplies power of the button battery to the controller 60, and provides power in a sleep state to the controller 60, and may cause the controller 60 to turn on the first power supply circuit 71. In this case, the charger 100 may omit the second power supply circuit 72, or may include four power supply circuits for supplying power to the controller 60.
The controller 60 is used for controlling the charger 100 to charge the battery 20, and is connected with a battery voltage detection module 61, a charging voltage detection module 62, a clock circuit 63, an indication module 64 and a charging current detection module 65. A watchdog circuit is also integrated within the controller 60 for waking up the controller 60 when the controller 60 enters a sleep state.
The battery voltage detection module 61 is connected to the controller power supply module 70, and detects the voltage of the battery 20 after the battery 20 is connected to the charger 100, and feeds back the detection information to the controller 60, and the controller 60 performs calculation to obtain the voltage value of the battery 20.
The charging voltage detection module 62 is configured to detect a charging voltage during the charging process of the battery 20 by the charger 100, feed back detection information to the controller 60, and obtain the charging voltage through calculation by the controller 60.
It is understood that the clock circuit 63 is an external low frequency clock circuit, and when the controller 60 enters the sleep mode, the power supply to the clock circuit 63 is stopped, thereby saving power.
The indication module 64 includes a plurality of light emitting diodes that emit light or change a light emitting color under the control of the controller 60, and the change in the light emitting color may be used to indicate the operating state of the charger 100 or whether the battery 20 has been fully charged. In this embodiment, two light emitting diodes D6 and D7 are provided to emit light of two colors of red and green, respectively. The status of the LED, corresponding to the status of the charger, is shown in table two below.
Watch two
The controller 60 obtains power from the controller power supply module 70, can receive the detection signal from the external power supply detection module 40, can determine whether the external power supply 10 is input according to the detection signal, can send a control signal to the electronic switch 32 and the controller power supply module 70, and can provide power to the clock circuit 63 and the indication module 64.
It can be understood that, when the controller 60 determines whether there is an input of the external power supply 10 according to the detection signal sent by the external power supply detection module 40, the determination manner may be different due to different specific compositions of the external power supply detection module 40, for example, the external power supply detection module 40 may be a sampling circuit, that is, it obtains the electric energy of the battery 20 to work, and performs sampling detection on the input of the external power supply 10, when the input of the external power supply 10 is not detected, it outputs a low level to the controller 60, and when the input of the external power supply 10 is detected, it outputs a high level to the controller 60, and with respect to the controller 60, the low level or the high level output by the external power supply detection module 40 is the detection signal. In this embodiment, the external power detection module 40 is an optical coupler power detection circuit, when the external power 10 is input, the detection signal output by the external power detection module 40 is an electrical signal, when the external power 10 is not input, the detection signal output by the external power detection module 40 is a null value, that is, the detection signal does not send an electrical signal, and the controller 60 determines whether the external power 10 is input according to the received electrical signal or the null value. Of course, the technical solution of the controller 60 determining whether the external power supply 10 is input through the external power supply detection module 40 is not limited thereto, and is not exhaustive again because of being limited to space, but the technical solution and the effect achieved by the technical solution are the same as or similar to the present invention, and are all covered by the scope of the present invention.
Referring to fig. 4, a flowchart of the operation of the controller 60 controlling the charger 100 to charge the battery 20 is shown.
When the battery 20 is installed in the charger 100, the first power supply circuit 71 and the second power supply circuit 72 both obtain power from the battery 20 to supply power to the controller 60, and the controller 60 starts to operate, and maintains the first power supply circuit 71 in the power-on state, and obtains a battery voltage value through the detection data operation provided by the battery voltage detection module 61, and determines whether the battery needs to be charged by comparing with a preset voltage value inside the controller 60, in this embodiment, for example, the preset voltage value is assumed to be 26V, when the controller 60 finds that the voltage of the battery 20 is greater than 26V, it is considered that the battery 20 does not need to be charged, and when the controller 60 finds that the battery voltage value is less than or equal to 26V, it is considered that the battery 20 needs to be charged.
When the battery 20 does not need to be charged, the controller 60 controls the first power supply circuit 71 to enter a power-off state, which is powered only by the second power supply circuit 72, the charging process is finished, and the controller enters a sleep state; when the battery 20 is detected to need to be charged, the controller 60 controls the electronic switch 32 to be closed, and the external power supply detection module 40 is used for detecting whether the external power supply 10 is input or not, when the external power supply 10 is not found, the controller 60 controls the first power supply circuit 71 to enter a power-off state, the first power supply circuit is only powered by the second power supply circuit 72, at the moment, the controller 60 enters a sleep state, and is awakened once by a watchdog circuit in the controller at intervals, after the first power supply circuit is awakened, the controller is switched on the first power supply circuit 71 and immediately controls the electronic switch 32 to be closed once, the external power supply detection circuit 40 is used for detecting whether the external power supply 10 is input or not, when the external power supply 10 is not input, the controller enters the sleep state again, and the steps; when the input of the external power source 10 is detected, the battery 20 starts to be charged.
It will be appreciated that the controller 60 is awakened from the sleep mode at intervals which may be gradually extended, such as every 3 seconds for the first 5 minutes, and the electronic switch 32 is controlled to close to detect the presence of the external power source 10, and if the external power source 10 is not present, then the controller 60 is awakened at intervals of 30 seconds from the 6 th minute to the 10 th minute, and then at intervals of 10 minutes. Of course, the invention is not limited to the rules of the wake-up controller 60 described in the present embodiment, and other modifications may be made by those skilled in the art, which are within the scope of the invention as long as their technical spirit is the same as or similar to the present invention.
During the charging process, the controller 60 determines whether the battery 20 is fully charged by acquiring the data detected by the battery voltage detection module 61, the charging voltage detection module 62 and the charging current detection module 65, and may also determine whether the battery 20 is fully charged according to only one of the data of the battery voltage, the charging voltage or the charging current. In the embodiment, for example, to judge whether the battery 20 is fully charged only according to the charging current, a preset current value, for example, 300mA is set in the controller 60, and when the controller 60 calculates the data detected by the charging current detection module 65, and the obtained charging current value is greater than 300mA, it is determined that the battery 20 is not fully charged, and the charging needs to be continued; when the charging current value is less than or equal to 300mA, the controller 60 determines that the battery 20 is fully charged, and controls the electronic switch 32 to be turned off to end the charging process.
It will be appreciated that when the battery 20 is fully charged, if the charger 100 is not disconnected, the charger 100 will enter a sleep state, powered only by the second power supply circuit 72, after which the controller 60 wakes up once every interval, switches on the first power supply circuit 71 and detects the battery voltage, controls the charger 100 to charge the battery 20 if the controller 60 finds that the battery 20 needs to be charged, and controls the first power supply circuit 71 to be powered off if the battery 20 does not need to be charged, and then enters the sleep state again.
Compared with the existing charger, the charger 100 adopts two power supply circuits for obtaining the electric energy from the battery 20 to supply power to the controller 60, the first power supply circuit 71 supplies the electric energy to the controller 60 through the voltage stabilizing module 75, so that the controller 60 can control the electronic switch 32 and detect the voltage or current and the like, the second power supply circuit 72 is provided with a large resistor R10, so that the current is small, and the voltage is stabilized only through one voltage stabilizing tube Z1, so that the controller 60 can be maintained in a dormant state, can be awakened and can be switched on the first power supply circuit 71. Since the controller 60 is powered by the second power supply circuit 72 only when entering the sleep mode, static power consumption of a plurality of electronic components in the first power supply circuit 71, especially power consumption of the voltage stabilizing module 75, is avoided, power of the battery 20 is saved, and the risk of further overdischarge of the battery 20 is also avoided.
Referring to fig. 5, a charging method for a charger 100 according to a first embodiment of the present invention includes the following steps.
Step S110: when the battery 20 is loaded in the charger 100, the first power supply circuit 71 and the second power supply circuit 72 obtain the power of the battery 20 to supply power to the controller 60.
When the battery 20 is loaded in the charger 100, the first power supply circuit 71 and the second power supply circuit 72 are powered on, and the controller 60 starts to operate and controls the first power supply circuit 71 to maintain the powered state.
Step S115: the controller 60 determines whether the battery 20 needs to be charged.
The controller 60 calculates the data detected by the battery voltage detection module 61 to obtain the battery voltage, compares the battery voltage with a preset voltage value in the controller 60, and determines whether the battery 20 needs to be charged.
Step S119: if the battery 20 does not need to be charged, the controller 60 controls the first power supply circuit 71 to be powered off, and only the second power supply circuit 72 supplies power to the controller 60.
Step S123: when the battery 20 needs to be charged, the controller 60 controls the electronic switch 32 to be closed, and the external power detection module 40 detects the input of the external power 10.
Step S125: when the external power detection module 40 does not detect the input of the external power 10, the controller 60 controls the electronic switch 32 to be turned off, and controls the first power supply circuit 71 to be powered off, and only the second power supply circuit 72 supplies power to the controller 60.
When the external power supply 10 is not detected by the controller 60 through the external power supply detection circuit 40, the controller 60 controls the first power supply circuit 71 to be powered off and only the second power supply circuit 72 to supply power, and then the controller 60 enters a sleep state.
Step S127: at intervals, the controller 60 turns on the first power supply circuit 71 once, and controls the electronic switch 32 to be closed, and the external power detection module 40 detects whether there is an input of the external power 10.
The controller 60 is awakened once every a period of time, and turns on the first power supply circuit 71, and then controls the electronic switch 32 to be closed once, and detects whether the external power supply 10 is input through the external power supply detection circuit 40.
Step S133: when the external power supply 10 is input, the charger 100 starts charging the battery 20.
Step S139: when the battery 20 is fully charged, the controller 60 controls the charger 100 to disconnect the external power source 10.
The controller 60 may determine whether the battery 20 is fully charged by acquiring data detected by the battery voltage detection module 61, the charging voltage detection module 62, and the charging current detection module 65, and may also determine whether the battery 20 is fully charged only according to the battery voltage, the charging voltage, or the charging current. In the present embodiment, the controller 60 determines whether the battery 20 is fully charged based on the charging current, and controls the electronic switch 32 to be turned off to disconnect the charger 100 from the external power supply 10 when the battery 20 is fully charged.
Step S141: the controller 60 turns on the first power supply circuit 71 once every certain time interval, and repeats the aforementioned step S115.
Because the battery 20 has a self-discharge phenomenon, if the battery 20 is installed on the charger 100 for a long time, the controller 60 will turn on the first power supply circuit 71 once at intervals, and calculate the voltage value of the battery 20 according to the data detected by the battery voltage detection module 61, and determine whether it needs to be charged.
It will be appreciated that the foregoing is a repeated cycle charging method which ends only when the battery 20 is removed from the charger 100.
It is understood that, referring to fig. 6, the step S115 further includes the following sub-steps.
Step S150: the controller 60 controls the first power supply circuit 71 to be energized.
Step S152: the battery voltage detection module 61 detects the voltage of the battery 10 and feeds back the detected data to the controller 60;
step S154: the controller 60 obtains a battery voltage value according to the detection data, and compares the battery voltage value with a preset voltage value;
step S156: when the battery voltage value is greater than or equal to the preset voltage value, the controller 60 controls the first power supply circuit 71 to be powered off, and only the second power supply circuit 72 supplies power to the controller 60.
Step S158: when the battery voltage value is less than the preset voltage value, the controller 60 controls the charger 100 to charge the battery 20.
It is understood that referring to fig. 7, the step S127 further includes the following sub-steps.
Step S160: the controller 60 turns on the first power supply circuit 71 at intervals.
The controller 60 wakes up once every interval, whereupon it turns on the first power supply circuit 71.
Step S162: the controller 60 controls the electronic switch 32 to close;
the controller 60 turns on the electronic switch 32 under the power supply of the first power supply circuit 71.
Step S164: the external power detection module 40 detects whether the external power 10 is input.
Step S166: when the external power detection module 40 does not detect the input of the external power 10, the controller 60 controls the electronic switch 32 to be turned off.
Step S168: the controller 60 controls the first power supply circuit 71 to be powered off, and only the second power supply circuit 72 supplies power to the controller 60.
At this time, the controller 60 enters a sleep state to wait for the next wake-up.
Please refer to fig. 8, which is a circuit diagram of a charger 200 according to a second embodiment of the present invention. The charger 200 is capable of charging the battery 220 by using the external power source 210, and has a main power supply line 280 connected to the external power source 210, and a switch assembly 230, an external power detection module 240, a conversion module 250, a controller 260 and a controller power supply module 270 are connected to the main power supply line 280.
The charger 200 has substantially the same function and structure as the charger 100 provided in the first embodiment, but differs therefrom in that: the controller power supply module 270 includes only the first power supply circuit 271 and the second power supply circuit 272.
When the battery 220 needs to be charged and the external power detection module 240 finds that the external power 210 is input, the current enters the current input line 278 along the main power supply line 280, and then flows through the first power supply circuit 271 and the second power supply circuit 272 to supply power to the controller 260. During the charging process of the battery 220, the controller 260 maintains the first power supply circuit 271 in the power-on state, so as to keep the controller 260 continuously and stably supplied with power.
Compared with the prior art, the charger and the charging method thereof are provided with the first power supply circuit and the second power supply circuit, when a battery is arranged in the charger, the two power supply circuits can obtain electric energy from the battery to supply power to the controller, if no external power supply is input into the charger at the moment, the controller can control the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller. The resistance of the second power supply circuit is large, and the power supply current is small, so that the electric energy consumed by the battery is very little, the battery is prevented from being further overdischarged, and the battery is effectively prevented from being damaged by the charger.
It will be appreciated by those skilled in the art that the invention can be implemented in other ways, provided that the technical spirit of the invention is the same as or similar to the invention, or that any changes and substitutions based on the invention are within the protection scope of the invention.
Claims (10)
1. A charger, comprising:
a charging circuit for charging the battery by using an external power supply;
the external power supply detection module is used for detecting the input of the external power supply and outputting a detection signal;
the controller is used for controlling the charging circuit to work and can receive the detection signal and judge whether the external power supply is input or not according to the detection signal;
a first power supply circuit and a second power supply circuit that supply power to the controller, a supply current of the second power supply circuit being smaller than a supply current of the first power supply circuit,
the method is characterized in that: the first power supply circuit and the second power supply circuit can obtain electric energy from the battery to supply power to the controller, and when the controller judges that no external power supply is input, the controller controls the first power supply circuit to be powered off.
2. The charger of claim 1, wherein: the charger also comprises a third power supply circuit, and when the external power supply is input into the charger, the third power supply circuit obtains the electric energy of the external power supply to supply power to the controller.
3. The charger of claim 2, wherein: when the charger starts to charge the battery, the first power supply loop is powered off, and the second power supply loop acquires the electric energy of the external power supply to supply power to the controller.
4. The charger of claim 1, wherein: the first power supply circuit is provided with a voltage stabilizing module, and the voltage of the first power supply circuit can be converted and supplied to the controller.
5. The charger according to any one of claims 1 to 4, wherein: the second power supply circuit is provided with a resistor and a voltage regulator tube which are connected in series.
6. The charger of claim 5, wherein: the second power supply circuit is provided with a capacitor connected with the voltage regulator tube in parallel and used for supplying power to the controller when the power consumption demand of the controller is increased instantly.
7. The charger according to claim 1 or 2, characterized in that: the charger also comprises a fourth power supply circuit with a button battery, and the fourth power supply circuit supplies the electric energy of the button battery to the controller.
8. A charging method of a charger is used for charging a battery by utilizing an external power supply, the charger is provided with a controller, an external power supply detection module, an electronic switch, a first power supply circuit and a second power supply circuit, wherein the first power supply circuit and the second power supply circuit supply power to the controller, and the power supply current of the second power supply circuit is smaller than the power supply current of the first power supply circuit, and the charging method is characterized in that: the charging method comprises the following steps:
when a battery is loaded into the charger, the first power supply circuit and the second power supply circuit acquire the electric energy of the battery to supply power to the controller;
the controller judges whether the battery needs to be charged;
when the battery needs to be charged, the controller controls the electronic switch to be closed, and the external power supply detection module detects the input of the external power supply;
when the external power supply detection module does not find the input of the external power supply, the controller controls the electronic switch to be switched off, controls the first power supply circuit to be powered off, and only supplies power to the controller through the second power supply circuit;
at intervals, the controller is connected with the first power supply circuit once, controls the electronic switch to be closed, and detects whether the external power supply is input or not through the external power supply detection module;
when the external power supply detection module detects the input of the external power supply, the charger starts to charge the battery.
9. The charging method of a charger according to claim 8, wherein: the charger also comprises a charging voltage detection module which feeds back detection data to the controller, the controller obtains the voltage value of the battery according to the detection data, and the controller judges whether the battery needs to be charged or not, and the charging voltage detection module also comprises the following steps:
the controller controls the first power supply circuit to be electrified;
the battery voltage detection module detects the battery voltage and feeds back the battery voltage to the controller to detect data;
the controller obtains a battery voltage according to the detection data, and compares the battery voltage with a preset voltage value;
when the battery voltage is larger than or equal to the preset voltage value, the controller controls the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller.
And when the voltage of the battery is smaller than the preset voltage value, the controller controls the charger to charge the battery.
10. The charging method of a charger according to claim 7, wherein: in the step of detecting whether the external power supply is input once every a period of time, the method further comprises the following substeps:
at intervals, the controller switches on the first power supply circuit;
the controller controls the electronic switch to be closed;
the external power supply detection module detects whether the external power supply is input;
when the external power supply detection module does not detect the input of the external power supply, the controller controls the electronic switch to be switched off;
the controller controls the first power supply circuit to be powered off, and only the second power supply circuit supplies power to the controller.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101149104A CN102148512B (en) | 2010-02-05 | 2010-02-05 | Charger and charging method thereof |
| PCT/CN2011/070864 WO2011095132A1 (en) | 2010-02-05 | 2011-01-31 | Charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101149104A CN102148512B (en) | 2010-02-05 | 2010-02-05 | Charger and charging method thereof |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201110118400.9A Division CN102148526B (en) | 2010-02-05 | 2010-02-05 | Charger |
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| CN102148512A true CN102148512A (en) | 2011-08-10 |
| CN102148512B CN102148512B (en) | 2013-10-16 |
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| CN2010101149104A Active CN102148512B (en) | 2010-02-05 | 2010-02-05 | Charger and charging method thereof |
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| CN103199572A (en) * | 2012-01-07 | 2013-07-10 | 苏州宝时得电动工具有限公司 | Charging base station and charging method |
| CN103701180A (en) * | 2014-01-10 | 2014-04-02 | 济南大学 | Electric vehicle charging APO (Automatic Power Off) device |
| CN104124718A (en) * | 2013-04-27 | 2014-10-29 | 宏碁股份有限公司 | Power supply device and power supply method |
| CN104617643A (en) * | 2015-03-09 | 2015-05-13 | 广东欧珀移动通信有限公司 | Charging method, equipment to be charged, power supply equipment and charging system |
| CN106300482A (en) * | 2015-06-05 | 2017-01-04 | 西安中兴新软件有限责任公司 | A kind of charger and control method thereof |
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| CN107546802A (en) * | 2017-09-08 | 2018-01-05 | 广州明美新能源有限公司 | A kind of high-power multi-series and parallel li-ion cell protection system |
| CN110338733A (en) * | 2019-07-15 | 2019-10-18 | 浙江帅康电气股份有限公司 | A kind of stand alone type water catalyst generator and cleaning device, electric appliance using it |
| CN110797948A (en) * | 2019-11-18 | 2020-02-14 | 深圳市群芯科创电子有限公司 | Fast charging control circuit |
| CN110797948B (en) * | 2019-11-18 | 2021-10-08 | 深圳市群芯科创电子有限公司 | Fast charging control circuit |
| CN113644708A (en) * | 2021-07-23 | 2021-11-12 | 深圳拓邦股份有限公司 | Equipment charging management system, device, method and storage medium |
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