CN105990859A - Battery charging device and method capable of detecting battery access state - Google Patents
Battery charging device and method capable of detecting battery access state Download PDFInfo
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- CN105990859A CN105990859A CN201510047821.5A CN201510047821A CN105990859A CN 105990859 A CN105990859 A CN 105990859A CN 201510047821 A CN201510047821 A CN 201510047821A CN 105990859 A CN105990859 A CN 105990859A
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Abstract
The application discloses a battery charging device and method capable of detecting a battery access state. The concrete implementation mode of the device comprises a voltage transformation circuit for transforming an inputted AC or DC into a DC voltage needed by the battery charging; a switch unit connected with the voltage transformation circuit and a battery; and a control unit for adjusting change of the DC voltage value outputted by the voltage transformation circuit, and detecting the relationship between the change of the voltage value outputted by the switch unit and the change of the DC voltage value outputted by the voltage transformation circuit and a current flowing through the switch unit. If the change of the voltage value outputted by the switch unit and the change of the DC voltage value outputted by the voltage transformation circuit are not same, and the current flowing through the switch unit is greater than zero, the control unit controls the switch unit to conduct to charge the battery. According to the implementation mode, the access sate of the battery of any rated voltage can be detected, and the accuracy of a detection result also can be guaranteed at a battery over-discharging state.
Description
Technical field
The application relates to power supply or the circuit arrangement field of distribution, particularly relates to detect battery and connects
Enter battery charger and the method for state.
Background technology
The detection method of battery access state is by conventional batteries charging device: detection device output
End has no-voltage, and battery accesses to have voltage to be then judged as, no-voltage is then judged as that battery does not accesses.
But, in actual applications, there is the state that voltage is zero volt in battery, i.e. over-discharge state,
When the battery of this state accesses, traditional detection method can be judged as that battery does not accesses, thus
Produce false judgment.Existing another kind of determination methods is: pre-connection one on lead-out terminal
Fixing voltage, this voltage need to be higher than cell voltage time actually used, but need to compare microcontroller
Supply voltage low.When the voltage detected on lead-out terminal is less than described fixed voltage, explanation
Battery accesses, correspondingly, when the voltage detected on lead-out terminal is equal to described fixed voltage,
Illustrate that battery does not accesses.This method can solve the problem of above-mentioned erroneous judgement, but to fixed voltage,
Cell voltage and microcontroller supply voltage all require, and in actual application, exist and can not expire
The situation of foot above-mentioned requirements, such as, general charging device system voltage is 5V or 3.3V,
The supply voltage i.e. representing fixed voltage and microcontroller is 5V or 3.3V, and lead-acid battery or
The cell voltage of series battery is higher, generally 24V or 36V, more than the confession of microcontroller
Piezoelectric voltage, institute the most also can be restricted.Offer accurately detection is provided
The needs of the apparatus and method of the access state of higher battery.
Summary of the invention
In order to solve above-mentioned defect of the prior art, on the one hand, this application provides and can detect
The battery charger of battery access state.Described device includes: transforming circuit, by input
AC or DC voltage is converted to the DC voltage needed for battery charging；Switch element, connects institute
State transforming circuit and described battery；And control unit, the unidirectional current of regulation transforming circuit output
Pressure value changes, and the change of the magnitude of voltage detecting the output of described switch element is defeated with described transforming circuit
Relation between the DC voltage value change gone out, and flow through the electric current of described switch element, as
The magnitude of voltage that the change of the magnitude of voltage of the most described switch element output exports with described transforming circuit
Change differs and flows through the electric current of described switch element more than zero, and the most described control unit controls
Described switching means conductive, to charge to described battery.
In some implementations, if be detected that the change of magnitude of voltage of described switch element output
Changing identical with the change of the magnitude of voltage of described transforming circuit output, described control unit controls described
Switch element disconnects, to stop charging to described battery.
In some implementations, described control unit includes detector unit and processing unit, its
In, the change of the magnitude of voltage of described detector unit detection switch element output, and by testing result
Send processing unit to；The change of the magnitude of voltage that described switch element is exported by described processing unit
The change of the magnitude of voltage exported with described transforming circuit compares, to determine described switch element
The change of the magnitude of voltage of output is the most identical with the change of the magnitude of voltage of described transforming circuit output.
In some implementations, described processing unit includes control circuit, described control circuit
The DC voltage value change of regulation transforming circuit output, and the voltage exported at described switch element
When the change of the magnitude of voltage that the change of value exports with described transforming circuit differs, open described in control
Pass unit conducting.
In some implementations, described switch element includes: resistance and electrical switch, described
Resistance is connected in parallel with electrical switch.
In some implementations, described electrical switch is relay, the coil of described relay
One end be connected as the DC source that relay is powered.
In some implementations, described relay conducting and disconnect by control circuit and crystal
Audion controls, and the outfan of described control circuit is connected with described crystal triode.
In some implementations, described crystal triode is NPN type, and described NPN type is brilliant
The colelctor electrode of body triode is connected with the other end of the coil of described relay, base stage and described control
Circuit output end processed connects, grounded emitter.
In some implementations, described crystal triode is positive-negative-positive, and described positive-negative-positive is brilliant
The colelctor electrode of body triode is connected with the other end of the coil of described relay, and emitter stage is with described
Control circuit outfan connects, base earth.
In some implementations, the change of the magnitude of voltage that described switch element exports and described change
When the change of the magnitude of voltage of volt circuit output is identical, the output of described control circuit is less than described crystal
The level signal of the conducting voltage of audion PN junction, described relay disconnects；Described switch is single
The change of the magnitude of voltage of unit's output differs with the change of the magnitude of voltage of described transforming circuit output
Time, the output of described control circuit is higher than the level of the conducting voltage of described crystal triode PN junction,
Described relay turns on.
On the other hand, this application provides a kind of battery charging side detecting battery access state
Method, power supply is charged to described battery by charging device, described charging device include transforming circuit,
Switch element and control unit, wherein said transforming circuit is for being converted into electricity by supply voltage
DC voltage required for the charging of pond, described switch element is used for connecting described transforming circuit and institute
Stating battery, described control unit is for being controlled described transforming circuit and described switch element；
Described method includes: regulate the DC voltage value change of described transforming circuit output；Detection switch
Unit output magnitude of voltage change with described transforming circuit output DC voltage value change it
Between relation and flow through the electric current of described switch element；If the electricity of described switch element output
The change of pressure value differs with the change of the magnitude of voltage of described transforming circuit output, the most described control
Unit controls described switching means conductive, to charge to described battery.
In some implementations, described method also includes: if be detected that described switch element
The change of the magnitude of voltage of output is identical with the change of the magnitude of voltage of described transforming circuit output, described
Control unit controls described switch element and disconnects, to stop charging to described battery.
The battery charger of the detected battery access state provided by the application and method,
The access state of the battery of any rated voltage can be detected, even and if being overdischarge at battery
It is also ensured that the accuracy of testing result during state.
Accompanying drawing explanation
By reading retouching in detail with reference to made non-limiting example is made of the following drawings
Stating, other features, purpose and advantage will become more apparent upon:
The application that shows Fig. 1 can detect a reality of the battery charger of battery access state
Execute the structural representation of example；
The application that shows Fig. 2 can detect a reality of the battery charger of battery access state
Execute the further structural representation of example；
Fig. 3 shows that control unit controls the signal of switching means conductive and a circuit of disconnection
Figure；
Fig. 4 shows that control unit controls showing of the switching means conductive another circuit with disconnection
It is intended to；
The application that shows Fig. 5 can detect the method for charging batteries of battery access state and a reality
Execute the flow chart of example.
Detailed description of the invention
With embodiment, the application is described in further detail below in conjunction with the accompanying drawings.It is appreciated that
, specific embodiment described herein is used only for explaining related invention, rather than to this
Bright restriction.It also should be noted that, for the ease of describe, accompanying drawing illustrate only with
About the part that invention is relevant.
It should be noted that in the case of not conflicting, the embodiment in the application and embodiment
In feature can be mutually combined.Describe this below with reference to the accompanying drawings and in conjunction with the embodiments in detail
Application.
Refer to Fig. 1, it illustrates the application and can detect the battery charging dress of battery access state
The structural representation Figure 100 of the embodiment put.As it is shown in figure 1, battery can be detected access shape
The battery charger of state can include transforming circuit 110, switch element 120 and control single
Unit 130.Wherein, transforming circuit 110 can by from alternating current power supply alternating voltage or from
The DC voltage of DC source is converted to the DC voltage needed for battery charging.Switch element is permissible
120 are used for connecting transforming circuit 110 and battery, including conducting and disconnection two states.Control
Unit 130 can be worked on power by the DC voltage that transforming circuit 110 exports, and regulates transformation
The DC voltage value of circuit 110 output (the most first raises the most in some way
Rear reduction or first reduce the mode raised afterwards) change.Such as, battery rated voltage to be charged is
48V, control unit 130 can control the voltage of transforming circuit output and first be increased to from 42V
58V, then it is reduced to 42 from 58V, period of change can be 5 seconds, at this period of change
The change of the magnitude of voltage of interior detection switch element 120 output and the direct current of transforming circuit 110 output
Relation between the change of magnitude of voltage, and detect whether to there is the electricity flowing through switch element 120
Stream, controls conducting and the disconnection of switch element according to testing result.
If the change that the magnitude of voltage of switch element 120 output occurs exports with transforming circuit 110
The change of DC voltage value differ, and flow through the electric current of switch element 120 more than zero, then
May determine that battery accesses, now control unit 130 can control switch element 120 and turns on,
To charge to battery.The change of the magnitude of voltage generation of switch element 120 output and transforming circuit 110
The change of DC voltage value of output differs the following two situation that can include: switch element
The magnitude of voltage of 120 outputs does not changes；The magnitude of voltage of switch element 120 output changes,
But change the change with the DC voltage value of transforming circuit 110 output to differ.
If the change that the magnitude of voltage of switch element 120 output occurs exports with transforming circuit 110
The change of voltage identical, then may determine that battery does not accesses, control unit 130 can control
Switch element 120 disconnects, to stop charging to battery.
With further reference to Fig. 2, it illustrates the battery that can detect battery access state shown in Fig. 1
The further structural representation of charging device.As in figure 2 it is shown, switch element 120 can wrap
Including the resistance 121 and electrical switch 122 being connected in parallel, resistance 122 breaks at electrical switch 121
When opening, transforming circuit 110 is connected with battery.When battery does not accesses, switch element 120 inputs
End (i.e. the outfan of transforming circuit) and the voltage of outfan are equal, i.e. work as transforming circuit
When the DC voltage value of 110 outputs is continually changing, the magnitude of voltage of switch element 120 outfan is also
Same change can occur；When battery accesses, the DC voltage value of transforming circuit 110 output is not
During disconnected change, the voltage of switch element 120 outfan, by cell voltage clamper, does not changes,
May determine that whether battery accesses charging device accordingly.
As in figure 2 it is shown, control unit 130 can include detector unit 131 and processing unit 132,
Wherein, detector unit 131 can detect the change of the magnitude of voltage of switch element output, and will inspection
Survey result and send processing unit 132 to.The electricity that switch element can be exported by processing unit 132
Magnitude of voltage (the i.e. switch element that the change of pressure value (i.e. battery voltage value) exports with transforming circuit
120 input magnitudes of voltage) change compare, to determine the magnitude of voltage that switch element exports
The change of magnitude of voltage that exports with transforming circuit of change the most identical.If comparative result is not
Identical, processing unit may determine that battery accesses, and controls switch element 120 and turns on, to battery
It is charged.If comparative result is identical, then may determine that battery does not accesses, control switch
Unit 120 disconnects.In some implementations, detector unit 131 can also detect switch element 120
The current signal at two ends, i.e. flows through the electric current of switch element, and processing unit can be according to flowing through out
The electric current closing unit judges whether battery accesses.
In some optional implementations, processing unit 132 can include control circuit, by
The DC voltage value change of control circuit regulation transforming circuit 110 output, and at switch element 120
When the change of the magnitude of voltage that the change of the magnitude of voltage of output exports with transforming circuit 110 differs,
Control switch element 120 to turn on.
With further reference to Fig. 3, it illustrates control unit and control switching means conductive and disconnection
The schematic diagram of one circuit.As it is shown on figure 3, switch element 120 can include resistance 121 He
Relay 122, resistance 121 and relay 122 are connected in parallel, the conducting of relay and disconnection
Controlled by control circuit and crystal triode.One end of the coil of relay with power for it
12V DC source connects, and the other end is connected with the colelctor electrode of negative-positive-negative transistor 310,
The base stage of negative-positive-negative transistor 310 is connected with the outfan of control circuit 320, emitter stage
Ground connection.In some implementations, transforming circuit 110 can be used to replace DC source as relay
Device is powered.
When processing unit determines change and the change of the magnitude of voltage (Vb in Fig. 3) that switch element exports
When the change of the magnitude of voltage (Vc in Fig. 3) of volt circuit output differs, control circuit in Fig. 3
320 outputs are higher than the high level signal of negative-positive-negative transistor PN junction conducting voltage, three poles
Pipe turns on, and at this moment forms path between coil and the emitter stage of audion of relay 122,
The coil upstream overexcitation electric current of relay, forms galvanomagnetic-effect, makes the input contact of relay
Linking together with output contact, relay 122 turns on, so that switching means conductive,
Battery is charged；When processing unit determines change and the institute of the magnitude of voltage that switch element exports
When the change of the magnitude of voltage stating transforming circuit output is identical, in Fig. 3, control circuit 320 exports low
In the high level signal of negative-positive-negative transistor PN junction conducting voltage, audion is in cut-off
State, the coil of relay does not has exciting current, the input contact of relay and output contact
Disconnecting, relay 122 disconnects, so that switch element disconnects, stops charging battery.
With further reference to Fig. 4, it illustrates control unit and control switching means conductive and disconnection
The schematic diagram of another circuit.
As shown in Figure 4, switch element 120 can include resistance 121 and relay 122, electricity
Resistance 121 and relay 122 are connected in parallel, and the conducting of relay and disconnection are by control circuit and crystalline substance
Body audion controls.One end of the coil of relay is connected with the 12V DC source powered for it,
The other end is connected with the colelctor electrode of positive-negative-positive crystal triode 410, positive-negative-positive crystal triode
The emitter stage of 410 is connected with the outfan of control circuit 420, base earth.
When processing unit determines that the change of the magnitude of voltage that switch element exports is defeated with described transforming circuit
When the change of the magnitude of voltage gone out differs, in Fig. 4, control circuit 420 output is brilliant higher than positive-negative-positive
The high level signal of body audion PN junction conducting voltage, triode ON, at this moment relay 122
Coil and the emitter stage of audion between formed path, on the coil of relay flow overexcitation
Electric current, forms galvanomagnetic-effect, makes the input contact of relay and output contact link together,
Relay 122 turns on, so that switching means conductive, is charged battery；Work as process
Unit determines the change of the magnitude of voltage that switch element exports and the magnitude of voltage of described transforming circuit output
Change identical time, in Fig. 4, control circuit 420 output is less than positive-negative-positive crystal triode PN
The low level signal of knot conducting voltage, audion is in cut-off state, and the coil of relay does not has
Having exciting current, the input contact of relay and output contact disconnect, and relay 122 disconnects,
So that switch element disconnects, stop battery being charged.
The battery charger of the detected battery access state that the embodiment of the present application provides, permissible
Detect the access state of the battery of any rated voltage, and due to according to transforming circuit output electricity
The variation relation of pressure value and battery voltage value judges whether battery accesses, even if thus at battery
Also will not the access state of false judgment battery when being in over-discharge state, it is achieved that battery accesses
The accurate detection of state.
With further reference to Fig. 5, it illustrates the application and can detect the battery of battery access state and fill
The flow chart 500 of method for electrically and an embodiment.In the present embodiment, power supply is filled by charging
Put and charge to battery.Charging device can include transforming circuit, switch element and control unit,
Wherein transforming circuit for being converted into the DC voltage required for battery charging by supply voltage, opens
Closing unit and be used for connecting transforming circuit and battery, described control unit is used for transforming circuit and opens
Pass unit is controlled.This method for charging batteries may include that
Step 501, the DC voltage value change of regulation transforming circuit output；
In the present embodiment, control unit can regulate the DC voltage of transforming circuit output one
With certain mechanical periodicity in the range of Ding, if such as battery rated voltage is 48V, the most permissible
Regulation transforming circuit output voltage with 5 seconds for the cycle in the range of 40V～56V first to go up
The mode declined after Shenging changes.
Step 502, the change of the magnitude of voltage of detection switch element output and transforming circuit output
Relation between the change of DC voltage value；
In the present embodiment, while the DC voltage value change of regulation transforming circuit output,
Control unit can detect the change of the magnitude of voltage of switch element output, and judges that switch element is defeated
The change of the magnitude of voltage gone out is the most identical with the change of the DC voltage value that transforming circuit exports.Control
Unit processed can also detect the electric current flowing through switch element, in conjunction with current detecting result and above-mentioned electricity
Buckling judged result determines whether battery accesses.
Step 503, if the change of the magnitude of voltage of transforming circuit output and switch element output
The change of magnitude of voltage differs, then control unit controls switching means conductive, to charge to battery.
In the present embodiment, if the control unit detects that the magnitude of voltage of transforming circuit output is constant
Change, or the change changing the magnitude of voltage exported with switch element differs, then may determine that electricity
Pond is accessed, and now control unit can send the control signal of conducting to switch element, and switch is single
Unit's conducting, power supply charges to battery.
In some implementations, after step 502, above-mentioned method for charging batteries can also include:
Step 504, if be detected that the change of the magnitude of voltage of switch element output and transforming circuit
The change of magnitude of voltage of output is identical, then control unit controls switch unit, with stop to
Battery charges.
It is pointed out that all parts in method flow illustrated in fig. 5 is with described above
Detected battery access state battery charger described in each parts corresponding, herein
Repeat no more.
Above description is only the preferred embodiment of the application and saying institute's application technology principle
Bright.It will be appreciated by those skilled in the art that invention scope involved in the application, do not limit
In the technical scheme of the particular combination of above-mentioned technical characteristic, also should contain simultaneously without departing from
In the case of described inventive concept, above-mentioned technical characteristic or its equivalent feature carry out combination in any
And other technical scheme formed.Such as features described above and (but not limited to) disclosed herein
The technical characteristic with similar functions is replaced mutually and the technical scheme that formed.
Claims (12)
1. the battery charger that can detect battery access state, it is characterised in that described
Device includes:
Transforming circuit, is converted to the direct current needed for battery charging by the AC or DC voltage of input
Voltage；
Switch element, connects described transforming circuit and described battery；
Control unit, the DC voltage value change of regulation transforming circuit output, detects described switch
Between change and the DC voltage value change of described transforming circuit output of the magnitude of voltage of unit output
Relation, and flow through the electric current of described switch element, if the electricity of described switch element output
The change of magnitude of voltage that the change of pressure value and described transforming circuit export differs and opens described in flowing through
Closing the electric current of unit more than zero, the most described control unit controls described switching means conductive, with to
Described battery charges.
Battery charger the most according to claim 1, it is characterised in that if detection
The magnitude of voltage of the change of the magnitude of voltage exported to described switch element and the output of described transforming circuit
Changing identical, described control unit controls described switch element and disconnects, to stop to described battery
Charging.
Battery charger the most according to claim 1 and 2, it is characterised in that described
Control unit includes detector unit and processing unit, wherein,
The change of the magnitude of voltage of described detector unit detection switch element output, and by testing result
Send processing unit to；
The change of the magnitude of voltage that described switch element is exported by described processing unit and described transformation electricity
The change of the magnitude of voltage of road output compares, to determine the magnitude of voltage that described switch element exports
Change the most identical with the change of magnitude of voltage that described transforming circuit exports.
Battery charger the most according to claim 3, it is characterised in that described process
Unit includes that control circuit, the DC voltage value of described control circuit regulation transforming circuit output become
Change, and the electricity of the change of the magnitude of voltage exported at described switch element and the output of described transforming circuit
When the change of pressure value differs, control described switching means conductive.
5. according to the battery charger one of claim 1-4 Suo Shu, it is characterised in that institute
Stating switch element to include: resistance and electrical switch, described resistance is connected in parallel with electrical switch.
Battery charger the most according to claim 5, it is characterised in that described electronics
Switch is relay, and one end of the coil of described relay is connected as the unidirectional current that relay is powered
Source.
Battery charger the most according to claim 6, it is characterised in that described relay
Conducting and the disconnection of device are controlled by control circuit and crystal triode, the output of described control circuit
End is connected with described crystal triode.
Battery charger the most according to claim 7, it is characterised in that described crystal
Audion is NPN type, the colelctor electrode of described NPN type transistor and described relay
The other end of coil connects, and base stage is connected with described control circuit outfan, grounded emitter.
Battery charger the most according to claim 7, it is characterised in that described crystal
Audion is positive-negative-positive, the colelctor electrode of described positive-negative-positive transistor and described relay
The other end of coil connects, and emitter stage is connected with described control circuit outfan, base earth.
Battery charger the most according to claim 8 or claim 9, it is characterised in that institute
The change of the magnitude of voltage that the change of the magnitude of voltage stating switch element output exports with described transforming circuit
Time identical, the output of described control circuit is less than the conducting voltage of described crystal triode PN junction
Level signal, described relay disconnects；The change of the magnitude of voltage of described switch element output and institute
When the change of the magnitude of voltage stating transforming circuit output differs, the output of described control circuit is higher than institute
Stating the level of the conducting voltage of crystal triode PN junction, described relay turns on.
11. 1 kinds of method for charging batteries that can detect battery access state, it is characterised in that electricity
Being charged to described battery by charging device in source, described charging device includes transforming circuit, switch
Unit and control unit, wherein said transforming circuit fills for supply voltage is converted into battery
DC voltage required for electricity, described switch element is used for connecting described transforming circuit and described electricity
Pond, described control unit is for being controlled described transforming circuit and described switch element；Institute
The method of stating includes:
Regulate the DC voltage value change of described transforming circuit output；
The change of the magnitude of voltage of detection switch element output and the unidirectional current of described transforming circuit output
Relation between the change of pressure value and flow through the electric current of described switch element；
If the electricity that the change of the magnitude of voltage of described switch element output exports with described transforming circuit
The change of pressure value differs, and the most described control unit controls described switching means conductive, with to institute
State battery charging.
12. method for charging batteries according to claim 11, it is characterised in that described side
Method also includes:
If be detected that the change of the magnitude of voltage of described switch element output is defeated with described transforming circuit
The change of the magnitude of voltage gone out is identical, and described control unit controls described switch element and disconnects, to stop
Only charge to described battery.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510047821.5A CN105990859B (en) | 2015-01-29 | 2015-01-29 | The battery charger and method of detectable battery access state |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510047821.5A CN105990859B (en) | 2015-01-29 | 2015-01-29 | The battery charger and method of detectable battery access state |
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| CN105990859A true CN105990859A (en) | 2016-10-05 |
| CN105990859B CN105990859B (en) | 2019-02-12 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107546815A (en) * | 2017-10-17 | 2018-01-05 | 南京博兰得电子科技有限公司 | A kind of universal charger |
| CN107968472A (en) * | 2017-11-24 | 2018-04-27 | 珠海格力电器股份有限公司 | A kind of charger and its control method |
| EP3667860A1 (en) * | 2018-12-14 | 2020-06-17 | Changzhou Globe Co., Ltd. | Charging output protection circuit and method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102694403A (en) * | 2012-05-30 | 2012-09-26 | 江苏科技大学 | Charger and control method thereof |
| CN102738876A (en) * | 2012-06-08 | 2012-10-17 | 江苏新日电动车股份有限公司 | Intelligent output control charger for power-driven vehicle |
| US20140285158A1 (en) * | 2011-12-13 | 2014-09-25 | Shindengen Electric Manufacturing Co., Ltd | Regulator, battery charging apparatus and battery charging method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140285158A1 (en) * | 2011-12-13 | 2014-09-25 | Shindengen Electric Manufacturing Co., Ltd | Regulator, battery charging apparatus and battery charging method |
| CN102694403A (en) * | 2012-05-30 | 2012-09-26 | 江苏科技大学 | Charger and control method thereof |
| CN102738876A (en) * | 2012-06-08 | 2012-10-17 | 江苏新日电动车股份有限公司 | Intelligent output control charger for power-driven vehicle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107546815A (en) * | 2017-10-17 | 2018-01-05 | 南京博兰得电子科技有限公司 | A kind of universal charger |
| CN107546815B (en) * | 2017-10-17 | 2021-01-22 | 南京博兰得电子科技有限公司 | Universal charger |
| CN107968472A (en) * | 2017-11-24 | 2018-04-27 | 珠海格力电器股份有限公司 | A kind of charger and its control method |
| EP3667860A1 (en) * | 2018-12-14 | 2020-06-17 | Changzhou Globe Co., Ltd. | Charging output protection circuit and method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105990859B (en) | 2019-02-12 |
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