CN104426139A - Anti-reverse battery charging protecting circuit - Google Patents
Anti-reverse battery charging protecting circuit Download PDFInfo
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- CN104426139A CN104426139A CN201310390966.6A CN201310390966A CN104426139A CN 104426139 A CN104426139 A CN 104426139A CN 201310390966 A CN201310390966 A CN 201310390966A CN 104426139 A CN104426139 A CN 104426139A
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Abstract
The invention discloses an anti-reverse battery charging protecting circuit, which is used for stopping charging a battery by a power supply when the power supply is reversely connected in a battery charging process. The circuit comprises a polarity judging module used for judging whether the polarity of the input power supply is reversely connected or not, a voltage protecting module used for voltage reduction of the input end and the output end of the polarity judging module, an interference filtering module used for filtering interference signals between the polarity judging module and a switch module. According to the anti-reverse battery charging protecting circuit, whether the polarity of the input power supply is reversely connected or not is judged by the polarity judging module, if the polarity of the input power supply is reversely connected, the polarity judging module is conducted and outputs low level to the switch module, and when the switch module receives the low level, the input power supply stops charging the battery. Charging of the battery can be avoided when the input power supply is reversely connected, so that reverse charging of the battery can be avoided, and the influence to the service life of the battery is not caused.
Description
Technical field
The present invention relates to battery protecting circuit, particularly relate to a kind of cell anti-reverse charging protection circuit stopping charging when the input power error-polarity connection of rechargeable battery.
Background technology
Rechargeable battery is the limited chargeable battery of charging times, coordinates charger to use.The benefit of rechargeable battery is the electrical equipment (as walkman, electronic toy etc.) of economy, environmental protection, electricity foot, applicable high-power, long-time use.The disposable battery that the voltage ratio model of rechargeable battery is identical is low, and general charging times can at about 1000 times now.In actual use, the maintenance of rechargeable battery is related to the useful life of rechargeable battery to rechargeable battery, and such as, counter filling appears in rechargeable battery, can impact the life-span of rechargeable battery, shortens the service time of rechargeable battery.
Summary of the invention
Based on this, be necessary to provide a kind of cell anti-reverse charging protection circuit stopping charging when the input power error-polarity connection of rechargeable battery.
A kind of cell anti-reverse charging protection circuit, for during reverse power connection, ending power supply and charge to battery, comprising: polarity judge module, voltage protection module, filtering interfering module and switch module in battery charging process;
The input termination positive source of described polarity judge module, the ground connection termination power cathode of described polarity judge module, the input of switch module described in the output termination of described polarity judge module, the input of described voltage protection module and output correspondence connect input and the output of described polarity judge module; The input of filtering interfering module described in the signal termination of described polarity judge module, the output of polarity judge module described in the output termination of described filtering interfering module, the output termination rechargeable battery positive pole of described switch module;
Described polarity judge module is for judging whether the polarity of input power connects instead, if when input power normally accesses, described polarity judge module must conduct, and exports high level to described switch module; Described filtering interfering module is used for the interference signal between the signal end of polarity judge module described in filtering and output, and described voltage protection module is used for stablizing described polarity judge module input and output pressure drop; Conducting during described switch module reception high level, input power charges to battery; If during input power reversal connection, described polarity judge module cut-off, and to described switch module output low level, end when described switch module receives low level, input power stops charging to battery.
Wherein in an embodiment, also comprise the reversal connection indicating module for sending index signal, the input termination input power negative pole of described reversal connection indicating module, the output termination input power positive pole of described reversal connection indicating module.
Wherein in an embodiment, described reversal connection indicating module comprises light-emitting diode D2 and divider resistance R5, described light-emitting diode D2 and divider resistance R5 is series between the both positive and negative polarity of input power, the positive pole of described light-emitting diode D2 connects input power negative pole, a termination input power positive pole of described divider resistance R5.
Wherein in an embodiment, described polarity judge module comprises divider resistance R1 and field effect transistor Q1, described divider resistance R1 one end ground connection, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 just connects input power positive pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module, and the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module; Described field effect transistor Q1 is P-channel field-effect transistor (PEFT) pipe.
Wherein in an embodiment, described polarity judge module comprises field effect transistor Q1 and divider resistance R1, the one termination input power positive pole of described divider resistance R1, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 connects input power negative pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module, the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module, and described field effect transistor Q1 is N channel field-effect pipe.
Wherein in an embodiment, described filtering interfering module comprises divider resistance R2, voltage stabilizing didoe D1 and filter capacitor C2, and described divider resistance R2, described voltage stabilizing didoe D1 and described filter capacitor C2 are all parallel to signal end and the output two ends of described polarity judge module.
Wherein in an embodiment, described voltage protection module comprises divider resistance R3 and filter capacitor C1, between the input that described divider resistance R3 and described filter capacitor C1 is series at described polarity judge module and output.
Wherein in an embodiment, described switch module comprises divider resistance R4 and field effect transistor Q2, the grid of field effect transistor Q2 described in described divider resistance R4 mono-termination, the source electrode of field effect transistor Q2 described in another termination, the drain electrode of described field effect transistor Q2 is the output of described switch module, and the points of common connection of described divider resistance R4 and described field effect transistor Q2 is the input of described switch module.
Above-mentioned cell anti-reverse charging protection circuit judges the polarity whether reversal connection of input power by polarity judge module; if reversal connection; then polarity judge module conducting to switch module output low level, ends when switch module receives low level, and input power stops charging to battery.Thus can avoid charging to battery when input power reversal connection, thus battery can be avoided to occur instead filling phenomenon, therefore can not impact the useful life of battery.
Accompanying drawing explanation
Fig. 1 is the module map of cell anti-reverse charging protection circuit;
Fig. 2 is one of schematic diagram of cell anti-reverse charging protection circuit;
Fig. 3 is one of schematic diagram of cell anti-reverse charging protection circuit.
Embodiment
As shown in Figure 1, be the module map of cell anti-reverse charging protection circuit.
A kind of cell anti-reverse charging protection circuit, for during reverse power connection, ending power supply and charge to battery, comprising: polarity judge module 101, voltage protection module 105, filtering interfering module 103 and switch module 107 in battery charging process.
The input termination positive source of described polarity judge module 101, the ground connection termination power cathode of described polarity judge module 101, the input of switch module 107 described in the output termination of described polarity judge module 101, the input of described voltage protection module 105 and output correspondence connect input and the output of described polarity judge module 101; The input of filtering interfering module 103 described in the signal termination of described polarity judge module 101, the output of polarity judge module 101 described in the output termination of described filtering interfering module 103, the output termination rechargeable battery positive pole of described switch module 107.
Described polarity judge module 101 is for judging whether the polarity of input power connects instead, if when input power normally accesses, described polarity judge module 101 must conduct, and exports high level to described switch module 107; Described filtering interfering module 103 is for the interference signal between the signal end of polarity judge module 101 described in filtering and output, and described voltage protection module 105 is for stablizing described polarity judge module 101 input and output pressure drop; Conducting when described switch module 107 receives high level, input power charges to battery; If during input power reversal connection, described polarity judge module 101 ends, and to described switch module 107 output low level, ends when described switch module 107 receives low level, and input power stops charging to battery.
Cell anti-reverse charging protection circuit also comprises the reversal connection indicating module 109 for sending index signal, the input termination input power negative pole of described reversal connection indicating module 109, the output termination input power positive pole of described reversal connection indicating module 109.
Polarity judge module 101 is for judging whether input power connects instead.When the access polarity of input power is normal, namely the both positive and negative polarity of input power does not connect inverse time, and polarity judge module 101 conducting also exports high level to switch module 107.Connect inverse time at input power, polarity judge module 101 ends and to switch module 107 output low level.
The interference signal that filtering interfering module 103 exports for filtering polarity judge module 101.The interference of polarity judge module 101 is avoided to impact follow-up switch module 107 and battery.
Voltage protection module 105, for the voltage between stable polarity judge module 101 input and output, avoids high pressure to cause damage to polarity judge module 101.
Switch module 107 controls the charge condition to battery for the level signal exported according to polarity judge module 101, concrete, when polarity judge module 101 exports high level, switch module 107 conducting is also charged to battery, during polarity judge module 101 output low level, switch module 107 ends and stops charging to battery.
Reversal connection indicating module 109, for sending index signal in input power reversal connection, represents that input power is in reversal connection state.When input power is normal, reversal connection indicating module 109 does not send index signal.
Incorporated by reference to Fig. 2.In one embodiment, polarity judge module 101 comprises divider resistance R1 and field effect transistor Q1, described divider resistance R1 one end ground connection, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 just connects input power positive pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module 101, and the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module 101; Described field effect transistor Q1 is P-channel field-effect transistor (PEFT) pipe.
Incorporated by reference to Fig. 3.In yet another embodiment, polarity judge module 101 comprises field effect transistor Q1 and divider resistance R1, the one termination input power positive pole of described divider resistance R1, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 connects input power negative pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module 101, the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module 101, and described field effect transistor Q1 is N channel field-effect pipe.
Incorporated by reference to Fig. 2 or Fig. 3.Filtering interfering module 103 comprises divider resistance R2, voltage stabilizing didoe D1 and filter capacitor C2, and described divider resistance R2, described voltage stabilizing didoe D1 and described filter capacitor C2 are all parallel to signal end and the output two ends of described polarity judge module 101.
Voltage protection module 105 comprises divider resistance R3 and filter capacitor C1, between the input that described divider resistance R3 and described filter capacitor C1 is series at described polarity judge module 101 and output.
Switch module 107 comprises divider resistance R4 and field effect transistor Q2, the grid of field effect transistor Q2 described in described divider resistance R4 mono-termination, the source electrode of field effect transistor Q2 described in another termination, the drain electrode of described field effect transistor Q2 is the output of described switch module 107, and the points of common connection of described divider resistance R4 and described field effect transistor Q2 is the input of described switch module 107.
Reversal connection indicating module 109 comprises light-emitting diode D2 and divider resistance R5, described light-emitting diode D2 and divider resistance R5 is series between the both positive and negative polarity of input power, the positive pole of described light-emitting diode D2 connects input power negative pole, a termination input power positive pole of described divider resistance R5.
Based on above-mentioned all embodiments, the operation principle of cell anti-reverse charging protection circuit is as follows:
For field effect transistor Q1 for P-channel field-effect transistor (PEFT) pipe.
When the both positive and negative polarity of input power normally accesses, field effect transistor Q1 is connected with input power negative pole by divider resistance R1, field effect transistor Q1 conducting, therefore field effect transistor Q1 exports high level to the grid of field effect transistor Q2, field effect transistor Q2 receives high level conducting, and input power is charged the battery by field effect transistor Q1 and field effect transistor Q2.During field effect transistor Q1 conducting, filter capacitor C2 in parallel between the grid of field effect transistor Q1 with drain electrode and voltage stabilizing didoe D1 is used for the grid of filtering field effect transistor Q1 and the interference signal between draining.And divider resistance R3 and filter capacitor C1 is used for stablizing the voltage between field effect transistor Q1 source electrode and drain electrode, avoids pressure drop too high, damage is caused to field effect transistor Q1.Now, light-emitting diode D2 ends, not luminous.
During input power reversal connection, the grid of field effect transistor Q1 is connected with input power positive pole by divider resistance R1, and field effect transistor Q1 ends.The drain electrode output low level of field effect transistor Q1, the grid of field effect transistor Q2 receives low level, and field effect transistor Q2 ends.Input power stops charging to battery.Therefore, it is possible to stop when reverse power connection, to battery charging, avoiding battery to occur counter filling.
After input power reversal connection, the positive pole of light-emitting diode D2 connects the positive pole of input power, and therefore, light-emitting diode D2 is luminous, represents input power reversal connection.
Above-mentioned cell anti-reverse charging protection circuit judges the polarity whether reversal connection of input power by polarity judge module 101; if reversal connection; then polarity judge module 101 conducting to switch module 107 output low level, ending when switch module 107 receives low level, input power stops charging to battery.Thus can avoid charging to battery when input power reversal connection, thus battery can be avoided to occur instead filling phenomenon, therefore can not impact the useful life of battery.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (8)
1. a cell anti-reverse charging protection circuit, for during reverse power connection, ending power supply and charge to battery, it is characterized in that, comprising: polarity judge module, voltage protection module, filtering interfering module and switch module in battery charging process;
The input termination positive source of described polarity judge module, the ground connection termination power cathode of described polarity judge module, the input of switch module described in the output termination of described polarity judge module, the input of described voltage protection module and output correspondence connect input and the output of described polarity judge module; The input of filtering interfering module described in the signal termination of described polarity judge module, the output of polarity judge module described in the output termination of described filtering interfering module, the output termination rechargeable battery positive pole of described switch module;
Described polarity judge module is for judging whether the polarity of input power connects instead, if when input power normally accesses, described polarity judge module must conduct, and exports high level to described switch module; Described filtering interfering module is used for the interference signal between the signal end of polarity judge module described in filtering and output, and described voltage protection module is used for stablizing described polarity judge module input and output pressure drop; Conducting during described switch module reception high level, input power charges to battery; If during input power reversal connection, described polarity judge module cut-off, and to described switch module output low level, end when described switch module receives low level, input power stops charging to battery.
2. cell anti-reverse charging protection circuit according to claim 1; it is characterized in that; also comprise the reversal connection indicating module for sending index signal, the input termination input power negative pole of described reversal connection indicating module, the output termination input power positive pole of described reversal connection indicating module.
3. cell anti-reverse charging protection circuit according to claim 2; it is characterized in that; described reversal connection indicating module comprises light-emitting diode D2 and divider resistance R5; described light-emitting diode D2 and divider resistance R5 is series between the both positive and negative polarity of input power; the positive pole of described light-emitting diode D2 connects input power negative pole, a termination input power positive pole of described divider resistance R5.
4. cell anti-reverse charging protection circuit according to claim 1, it is characterized in that, described polarity judge module comprises divider resistance R1 and field effect transistor Q1, described divider resistance R1 one end ground connection, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 just connects input power positive pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module, and the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module; Described field effect transistor Q1 is P-channel field-effect transistor (PEFT) pipe.
5. cell anti-reverse charging protection circuit according to claim 1, it is characterized in that, described polarity judge module comprises field effect transistor Q1 and divider resistance R1, the one termination input power positive pole of described divider resistance R1, the grid of field effect transistor Q1 described in another termination, the source electrode of described field effect transistor Q1 connects input power negative pole, the drain electrode of described field effect transistor Q1 is the output of described polarity judge module, the points of common connection of described divider resistance R1 and described field effect transistor Q1 grid is the signal end of described polarity judge module, described field effect transistor Q1 is N channel field-effect pipe.
6. cell anti-reverse charging protection circuit according to claim 1; it is characterized in that; described filtering interfering module comprises divider resistance R2, voltage stabilizing didoe D1 and filter capacitor C2, and described divider resistance R2, described voltage stabilizing didoe D1 and described filter capacitor C2 are all parallel to signal end and the output two ends of described polarity judge module.
7. cell anti-reverse charging protection circuit according to claim 1; it is characterized in that; described voltage protection module comprises divider resistance R3 and filter capacitor C1, between the input that described divider resistance R3 and described filter capacitor C1 is series at described polarity judge module and output.
8. cell anti-reverse charging protection circuit according to claim 1; it is characterized in that; described switch module comprises divider resistance R4 and field effect transistor Q2; the grid of field effect transistor Q2 described in described divider resistance R4 mono-termination; the source electrode of field effect transistor Q2 described in another termination; the drain electrode of described field effect transistor Q2 is the output of described switch module, and the points of common connection of described divider resistance R4 and described field effect transistor Q2 is the input of described switch module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310390966.6A CN104426139A (en) | 2013-08-30 | 2013-08-30 | Anti-reverse battery charging protecting circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310390966.6A CN104426139A (en) | 2013-08-30 | 2013-08-30 | Anti-reverse battery charging protecting circuit |
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| CN104426139A true CN104426139A (en) | 2015-03-18 |
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| CN201310390966.6A Pending CN104426139A (en) | 2013-08-30 | 2013-08-30 | Anti-reverse battery charging protecting circuit |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108267622A (en) * | 2018-01-22 | 2018-07-10 | 常州同惠电子股份有限公司 | A kind of electronic load device with electric voltage reverse-connection defencive function |
| CN111711171A (en) * | 2020-06-18 | 2020-09-25 | 广东博智林机器人有限公司 | Power protection circuit and servo driver |
| WO2021097898A1 (en) * | 2019-11-20 | 2021-05-27 | 刘翠萍 | High-current switch circuit having reverse connection prevention function |
| WO2023102885A1 (en) * | 2021-12-10 | 2023-06-15 | 深圳市华思旭科技有限公司 | Circuit structure and start-up power supply apparatus |
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Application publication date: 20150318 |