CN204349541U - The battery charger of battery access state can be detected - Google Patents
The battery charger of battery access state can be detected Download PDFInfo
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- CN204349541U CN204349541U CN201520063709.6U CN201520063709U CN204349541U CN 204349541 U CN204349541 U CN 204349541U CN 201520063709 U CN201520063709 U CN 201520063709U CN 204349541 U CN204349541 U CN 204349541U
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- 230000001131 transforming effect Effects 0.000 claims abstract description 62
- 230000001105 regulatory effect Effects 0.000 claims abstract description 8
- 238000012360 testing method Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 17
- 230000001276 controlling effect Effects 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005352 galvanomagnetic phenomena Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
This application discloses the battery charger that can detect battery access state.One embodiment of described device comprises: transforming circuit, the interchange of input or direct voltage is converted to the direct voltage needed for battery charging; Switch element, connects transforming circuit and battery; And control unit, the DC voltage value change regulating transforming circuit to export, relation between the DC voltage value that the change of the magnitude of voltage that sense switch unit exports and transforming circuit export changes, if the change of the magnitude of voltage that switch element exports is not identical with the change of the magnitude of voltage that transforming circuit exports, then control unit controls described switching means conductive, to charge to battery.This execution mode can detect the access state of the battery of any rated voltage, even and if also can ensure the accuracy of testing result when battery is over-discharge state.
Description
Technical field
The application relates to the circuit arrangement field of power supply or distribution, particularly relates to the battery charger that can detect battery access state.
Background technology
Conventional batteries charging device to the detection method of battery access state is: checkout gear output has no-voltage, and battery accesses to have voltage to be then judged as, no-voltage is then judged as that battery does not access.But in actual applications, battery exists the state that voltage is zero volt, i.e. over-discharge state, when the battery of this state accesses, traditional detection method can be judged as that battery does not access, thus produces false judgment.Existing another kind of determination methods is: the voltage that pre-connection one is fixing on lead-out terminal, and cell voltage when this voltage need use than reality is high, but need be lower than the supply power voltage of microcontroller.When detecting that the voltage on lead-out terminal is lower than described fixed voltage, illustrates that battery accesses, correspondingly, when detecting that the voltage on lead-out terminal equals described fixed voltage, illustrate that battery does not access.This method can solve the problem of above-mentioned erroneous judgement, but there is requirement to fixed voltage, cell voltage and microcontroller supply power voltage, in practical application, existence can not meet the situation of above-mentioned requirements, such as, general charging device system voltage is 5V or 3.3V, namely the supply power voltage of expression fixed voltage and microcontroller is 5V or 3.3V, and the cell voltage of lead-acid battery or series battery is higher, be generally 24V or 36V, be greater than the supply power voltage of microcontroller, institute in this approach in use also can be restricted.Therefore, there are the needs of the device that the access state accurately detecting higher battery is provided.
Utility model content
In order to solve above-mentioned defect of the prior art, this application provides the battery charger and method that can detect battery access state.
On the one hand, this application provides a kind of battery charger, described device comprises: transforming circuit, the interchange of input or direct voltage is converted to the direct voltage needed for battery charging; Switch element, connects described transforming circuit and described battery; And control unit, the DC voltage value change regulating transforming circuit to export, detect the change of magnitude of voltage that described switch element exports and the DC voltage value that described transforming circuit exports change between relation, control conducting and the disconnection of described switch element according to described relation.
In some implementations, described conducting and the disconnection controlling described switch element according to described relation, comprise: if the change of the magnitude of voltage of described switch element output is not identical with the change of the magnitude of voltage that described transforming circuit exports, then described control unit controls described switching means conductive, to charge to described battery; If the change of the magnitude of voltage that described switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, described control unit controls described switch element and disconnects, to stop charging to described battery.
In some implementations, described control unit comprises detecting unit and processing unit, wherein, and the change of the magnitude of voltage that described detecting unit sense switch unit exports, and send testing result to processing unit; Whether the change of the magnitude of voltage that the change of the magnitude of voltage that described switch element exports by described processing unit and described transforming circuit export compares, identical with the change of the change with the magnitude of voltage that described transforming circuit exports of determining the magnitude of voltage that described switch element exports.
In some implementations, described processing unit comprises control circuit, the DC voltage value change that described control circuit regulates transforming circuit to export, and when the change of the magnitude of voltage that described switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, control described switching means conductive.
In some implementations, described switch element comprises: resistance and electronic switch, and described resistance and electronic switch are connected in parallel.
In some implementations, described electronic switch is relay, and one end of the coil of described relay connects the DC power supply of powering for relay.
In some implementations, conducting and the disconnection of described relay are controlled by control circuit and transistor, and the output of described control circuit is connected with described transistor.
In some implementations, described transistor is NPN type, and the collector electrode of described NPN type transistor is connected with the other end of the coil of described relay, and base stage is connected with described control circuit output, grounded emitter.
In some implementations, described transistor is positive-negative-positive, and the collector electrode of described positive-negative-positive transistor is connected with the other end of the coil of described relay, and emitter is connected with described control circuit output, base earth.
In some implementations, when the change of the magnitude of voltage that described switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, described control circuit exports the level signal lower than the conducting voltage of described transistor PN junction, and described relay disconnects; When the change of the magnitude of voltage that described switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, described control circuit exports the level higher than the conducting voltage of described transistor PN junction, described relay conducting.
The battery charger of the detected battery access state provided by the application, can detect the access state of the battery of any rated voltage, even and if also can ensure the accuracy of testing result when battery is over-discharge state.
Accompanying drawing explanation
By reading the detailed description done non-limiting example done with reference to the following drawings, the other features, objects and advantages of the application will become more obvious:
The application that shows Fig. 1 can detect the structural representation of an embodiment of the battery charger of battery access state;
The application that shows Fig. 2 can detect the further structural representation of an embodiment of the battery charger of battery access state;
Fig. 3 shows the schematic diagram of a circuit of control unit control switch cell conduction and disconnection;
Fig. 4 shows the schematic diagram of another circuit of control unit control switch cell conduction and disconnection.
Embodiment
Below in conjunction with drawings and Examples, the application is described in further detail.Be understandable that, specific embodiment described herein is only for explaining relevant utility model, but not the restriction to this utility model.It also should be noted that, for convenience of description, in accompanying drawing, illustrate only the part relevant with relevant utility model.
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the application in detail in conjunction with the embodiments.
Please refer to Fig. 1, it illustrates structural representation Figure 100 that the application can detect an embodiment of the battery charger of battery access state.As shown in Figure 1, the battery charger that can detect battery access state can comprise transforming circuit 110, switch element 120 and control unit 130.Wherein, the alternating voltage from AC power or the direct voltage from DC power supply can be converted to the direct voltage needed for battery charging by transforming circuit 110.Switch element 120 for connecting transforming circuit 110 and battery, can comprise conducting and disconnecting two states.The direct voltage that control unit 130 can be exported by transforming circuit 110 works on power, and the DC voltage value regulating transforming circuit 110 to export (such as first raises and reduce afterwards or first reduce the mode raised afterwards) change within the specific limits in some way.Such as, battery rated voltage to be charged is 48V, the voltage that control unit 130 can control transforming circuit output is first elevated to 58V from 42V, 42 are reduced to again from 58V, period of change can be 5 seconds, relation between the change of the change of magnitude of voltage that sense switch unit 120 exports in this period of change and the DC voltage value that transforming circuit 110 exports, if the change of the DC voltage value that the change that the magnitude of voltage that switch element 120 exports occurs exports with transforming circuit 110 is not identical, then can determine that battery accesses, now control unit 130 can control switch unit 120 conducting, to charge to battery.The change of the DC voltage value that the change that the magnitude of voltage that switch element 120 exports occurs exports with transforming circuit 110 is not identical can comprise following two kinds of situations: the magnitude of voltage that switch element 120 exports does not change; The magnitude of voltage that switch element 120 exports changes, but the change of DC voltage value that change and transforming circuit 110 export is not identical.
In some implementations, if the change that the magnitude of voltage that switch element 120 exports occurs is identical with the change of the voltage that transforming circuit 110 exports, then can determine that battery does not access, control unit 130 can disconnect by control switch unit 120, to stop charging to battery.
With further reference to Fig. 2, it illustrates the further structural representation of the battery charger that can detect battery access state shown in Fig. 1.As shown in Figure 2, switch element 120 can comprise the resistance 121 and electronic switch 122 that are connected in parallel, and transforming circuit 110 is connected with battery when electronic switch 121 disconnects by resistance 122.When battery does not access, the voltage of switch element 120 input (i.e. the output of transforming circuit) and output is equal, namely, when the DC voltage value exported when transforming circuit 110 constantly changes, also can there is same change in the magnitude of voltage of switch element 120 output; When battery access, when the DC voltage value that transforming circuit 110 exports constantly changes, the voltage of switch element 120 output, by cell voltage clamper, does not change, and can judge whether battery accesses charging device accordingly.
As shown in Figure 2, control unit 130 can comprise detecting unit 131 and processing unit 132, and wherein, detecting unit 131 can the change of magnitude of voltage that exports of sense switch unit, and sends testing result to processing unit 132.Whether the change of the change of magnitude of voltage (i.e. battery voltage value) that switch element can export by processing unit 132 and the magnitude of voltage that transforming circuit export (i.e. switch element 120 input magnitude of voltage) compares, identical with the change of the change with the magnitude of voltage that transforming circuit exports of determining the magnitude of voltage that switch element exports.If comparative result is not identical, processing unit can determine that battery accesses, and control switch unit 120 conducting, charges to battery.If comparative result is identical, then can determine that battery does not access, control switch unit 120 disconnects.
In some optional implementations, processing unit 132 can comprise control circuit, the DC voltage value regulating transforming circuit 110 to export by control circuit changes, and when the change of the magnitude of voltage that the change of the magnitude of voltage that switch element 120 exports exports with transforming circuit 110 is not identical, control switch unit 120 conducting.
With further reference to Fig. 3, it illustrates the schematic diagram of a circuit of control unit control switch cell conduction and disconnection.As shown in Figure 3, switch element 120 can comprise resistance 121 and relay 122, and resistance 121 and relay 122 are connected in parallel, and conducting and the disconnection of relay are controlled by control circuit and transistor.One end of the coil of relay is connected with the 12V DC power supply of powering for it, and the other end is connected with the collector electrode of negative-positive-negative transistor 310, and the base stage of negative-positive-negative transistor 310 is connected with the output of control circuit 320, grounded emitter.In some implementations, transforming circuit 110 can be adopted to be that relay is powered to replace DC power supply.
When the change of the magnitude of voltage (in Fig. 3 Vb) that processing unit determination switch element exports is not identical with the change of the magnitude of voltage that transforming circuit exports (in Fig. 3 Vc), in Fig. 3, control circuit 320 exports the high level signal higher than negative-positive-negative transistor PN junction conducting voltage, triode ON, at this moment path is formed between the coil of relay 122 and the emitter of triode, at the coil upper reaches overexcitation electric current of relay, form galvanomagnetic effect, the input contact of relay and output contact are linked together, relay 122 conducting, thus make switching means conductive, battery is charged, when the change of the magnitude of voltage that processing unit determination switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, in Fig. 3, control circuit 320 exports the high level signal lower than negative-positive-negative transistor PN junction conducting voltage, triode is in cut-off state, the coil of relay do not have exciting current, the input contact of relay and output contact disconnect, relay 122 disconnects, thus switch element is disconnected, and stops charging to battery.
With further reference to Fig. 4, it illustrates the schematic diagram of another circuit of control unit control switch cell conduction and disconnection.
As shown in Figure 4, switch element 120 can comprise resistance 121 and relay 122, and resistance 121 and relay 122 are connected in parallel, and conducting and the disconnection of relay are controlled by control circuit and transistor.One end of the coil of relay is connected with the 12V DC power supply of powering for it, and the other end is connected with the collector electrode of positive-negative-positive transistor 410, and the emitter of positive-negative-positive transistor 410 is connected with the output of control circuit 420, base earth.
When the change of the magnitude of voltage that processing unit determination switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, in Fig. 4, control circuit 420 exports the high level signal higher than positive-negative-positive transistor PN junction conducting voltage, triode ON, at this moment path is formed between the coil of relay 122 and the emitter of triode, at the coil upper reaches overexcitation electric current of relay, form galvanomagnetic effect, the input contact of relay and output contact are linked together, relay 122 conducting, thus make switching means conductive, battery is charged; When the change of the magnitude of voltage that processing unit determination switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, in Fig. 4, control circuit 420 exports the low level signal lower than positive-negative-positive transistor PN junction conducting voltage, triode is in cut-off state, the coil of relay do not have exciting current, the input contact of relay and output contact disconnect, relay 122 disconnects, thus switch element is disconnected, and stops charging to battery.
The battery charger of the detected battery access state that the embodiment of the present application provides, the access state of the battery of any rated voltage can be detected, and owing to judging whether battery accesses according to the variation relation of transforming circuit output voltage values and battery voltage value, even if thus also can not the access state of false judgment battery when battery is in over-discharge state, achieve the accurate detection of battery access state.
The battery charger of the detected battery access state that the application provides can detect the access state of battery by the following method and charge: first, the DC voltage value change regulating transforming circuit to export.Particularly, the direct voltage that control unit can regulate transforming circuit to export is within the specific limits with certain mechanical periodicity, if such as battery rated voltage is 48V, then the voltage that transforming circuit can be regulated to export with 5 seconds for the cycle changes in the mode declined afterwards that first rises in the scope of 40V ~ 56V.Then, the relation between the change of DC voltage value that exports of the change of magnitude of voltage that exports of control unit sense switch unit and transforming circuit.Particularly, while the DC voltage value change regulating transforming circuit to export, control unit can the change of magnitude of voltage that exports of sense switch unit, and judges that whether the change of the magnitude of voltage that switch element exports is identical with the change of the DC voltage value that transforming circuit exports.Afterwards, if the change of the magnitude of voltage of transforming circuit output is not identical with the change of the magnitude of voltage that switch element exports, then control unit control switch cell conduction, to charge to battery.Now control unit can determine that battery accesses, and send the control signal of conducting to switch element, switching means conductive, power supply charges to battery.If control unit detects that the change of the magnitude of voltage that switch element exports is identical with the change of the magnitude of voltage that transforming circuit exports, then control unit controls switch unit, to stop charging to battery.
More than describe and be only the preferred embodiment of the application and the explanation to institute's application technology principle.Those skilled in the art are to be understood that, utility model scope involved in the application, be not limited to the technical scheme of the particular combination of above-mentioned technical characteristic, also should be encompassed in when not departing from the design of described utility model, other technical scheme of being carried out combination in any by above-mentioned technical characteristic or its equivalent feature and being formed simultaneously.The technical characteristic that such as, disclosed in above-mentioned feature and the application (but being not limited to) has similar functions is replaced mutually and the technical scheme formed.
Claims (10)
1. can detect a battery charger for battery access state, it is characterized in that, described device comprises:
Transforming circuit, is converted to the direct voltage needed for battery charging by the interchange of input or direct voltage;
Switch element, connects described transforming circuit and described battery; And
Control unit, the DC voltage value change regulating transforming circuit to export, detect the change of magnitude of voltage that described switch element exports and the DC voltage value that described transforming circuit exports change between relation, control conducting and the disconnection of described switch element according to described relation.
2. battery charger according to claim 1, is characterized in that, described conducting and the disconnection controlling described switch element according to described relation, comprising:
If the change of the magnitude of voltage that described switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, then described control unit controls described switching means conductive, to charge to described battery;
If the change of the magnitude of voltage that described switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, described control unit controls described switch element and disconnects, to stop charging to described battery.
3. battery charger according to claim 1 and 2, is characterized in that, described control unit comprises detecting unit and processing unit, wherein,
The change of the magnitude of voltage that described detecting unit sense switch unit exports, and send testing result to processing unit;
Whether the change of the magnitude of voltage that the change of the magnitude of voltage that described switch element exports by described processing unit and described transforming circuit export compares, identical with the change of the change with the magnitude of voltage that described transforming circuit exports of determining the magnitude of voltage that described switch element exports.
4. battery charger according to claim 3, it is characterized in that, described processing unit comprises control circuit, the DC voltage value change that described control circuit regulates transforming circuit to export, and when the change of the magnitude of voltage that described switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, control described switching means conductive.
5. according to the battery charger one of claim 1-4 Suo Shu, it is characterized in that, described switch element comprises: resistance and electronic switch, and described resistance and electronic switch are connected in parallel.
6. battery charger according to claim 5, is characterized in that, described electronic switch is relay, and one end of the coil of described relay connects the DC power supply of powering for relay.
7. battery charger according to claim 6, is characterized in that, conducting and the disconnection of described relay are controlled by control circuit and transistor, and the output of described control circuit is connected with described transistor.
8. battery charger according to claim 7, it is characterized in that, described transistor is NPN type, and the collector electrode of described NPN type transistor is connected with the other end of the coil of described relay, base stage is connected with described control circuit output, grounded emitter.
9. battery charger according to claim 7, it is characterized in that, described transistor is positive-negative-positive, and the collector electrode of described positive-negative-positive transistor is connected with the other end of the coil of described relay, emitter is connected with described control circuit output, base earth.
10. battery charger according to claim 8 or claim 9, it is characterized in that, when the change of the magnitude of voltage that described switch element exports is identical with the change of the magnitude of voltage that described transforming circuit exports, described control circuit exports the level signal lower than the conducting voltage of described transistor PN junction, and described relay disconnects; When the change of the magnitude of voltage that described switch element exports is not identical with the change of the magnitude of voltage that described transforming circuit exports, described control circuit exports the level higher than the conducting voltage of described transistor PN junction, described relay conducting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520063709.6U CN204349541U (en) | 2015-01-29 | 2015-01-29 | The battery charger of battery access state can be detected |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520063709.6U CN204349541U (en) | 2015-01-29 | 2015-01-29 | The battery charger of battery access state can be detected |
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| CN204349541U true CN204349541U (en) | 2015-05-20 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106992567A (en) * | 2017-04-25 | 2017-07-28 | 浙江亚特电器有限公司 | The multifunctional charger and its charge control method of a kind of electric tool |
| CN107546796A (en) * | 2017-08-09 | 2018-01-05 | 浙江亚特电器有限公司 | High-tension battery bag charging circuit |
| CN108414870A (en) * | 2017-02-10 | 2018-08-17 | 深圳市理邦精密仪器股份有限公司 | More battery detection circuit for access and electronic equipment |
-
2015
- 2015-01-29 CN CN201520063709.6U patent/CN204349541U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108414870A (en) * | 2017-02-10 | 2018-08-17 | 深圳市理邦精密仪器股份有限公司 | More battery detection circuit for access and electronic equipment |
| CN106992567A (en) * | 2017-04-25 | 2017-07-28 | 浙江亚特电器有限公司 | The multifunctional charger and its charge control method of a kind of electric tool |
| CN107546796A (en) * | 2017-08-09 | 2018-01-05 | 浙江亚特电器有限公司 | High-tension battery bag charging circuit |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150520 |