CN104426143A - Battery overvoltage absorbing circuit - Google Patents
Battery overvoltage absorbing circuit Download PDFInfo
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- CN104426143A CN104426143A CN201310390567.XA CN201310390567A CN104426143A CN 104426143 A CN104426143 A CN 104426143A CN 201310390567 A CN201310390567 A CN 201310390567A CN 104426143 A CN104426143 A CN 104426143A
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Abstract
The invention discloses a battery overvoltage absorbing circuit. The battery overvoltage absorbing circuit comprises a voltage detecting module used for detecting the voltage of an anode charging end of a battery, an indicating module used for transmitting an indicating signal, a switch module used for controlling disconnection and connection of the indicating module, and a voltage absorbing module used for absorbing the voltage of instantaneous high voltage generated by the anode charging end of the battery. The voltage of the anode charging end of the battery is detected by the voltage detecting module, and when the voltage detecting module output by the anode charging end of the battery is detected, the voltage detecting module controls connection of the switch module, so that the indicating module is connected and outputs the indicating signal, and the phenomenon indicates that the anode charging end of the battery outputs the instantaneous high voltage; meanwhile, the switch module and the indicating module are combined into a conduction loop to release the instantaneous high voltage to the ground; the voltage absorbing module is also connected and absorbs the instantaneous high voltage, therefore, when the anode charging end of the battery outputs the instantaneous high voltage, the battery overvoltage absorbing circuit can absorb the instantaneous high voltage, and damage to the battery and the charging circuit of the battery by the instantaneous high voltage is avoided.
Description
Technical field
The present invention relates to battery overvoltage crowbar, particularly relate to a kind of battery overpressure absorbing circuit absorbing battery and occur instantaneous high pressure in charging process.
Background technology
When researching and developing rechargeable battery, if the charger that outside uses is Switching Power Supply, and battery is in charging process, when being turned off by charge circuit suddenly because of certain reason, such as.Charge circuit will turn off by the reasons such as excess temperature, overvoltage or overcurrent.Now because Switching Power Supply sports Light Condition from heavy load, the output voltage of Switching Power Supply will raise suddenly.The instantaneous high pressure that now Switching Power Supply exports can cause damage to battery pack protective circuit, such as, punctures the elements such as field effect transistor.Thus battery is in charging process, when Switching Power Supply disconnects, can produce instantaneous high pressure, cause damage to the charging circuit of battery and battery at the positive charged terminal of battery.
Summary of the invention
Based on this, be necessary to provide a kind of battery overpressure absorbing circuit absorbing battery and occur instantaneous high pressure in charging process.
A kind of battery overpressure absorbing circuit, for absorbing the instantaneous high pressure that battery produces because charge circuit disconnects in charging process; Comprise the voltage detection module of the positive charged terminal voltage for detecting battery, for sending the indicating module of index signal, ending the voltage absorption module of the instantaneous high pressure produced with the switch module of conducting and the positive charged terminal for absorbing battery for controlling described indicating module;
The input of the input of described voltage detection module, the input of described switch module, described voltage absorption module is all connected with the positive charged terminal of battery, the control end of switch module described in the output termination of described voltage detection module, the input of indicating module described in the output termination of described switch module, the equal ground connection of earth terminal of the earth terminal of described voltage detection module, the earth terminal of described indicating module, described voltage absorption module;
Described voltage detection module is for detecting the voltage of the positive charged terminal of battery, when there is instantaneous high pressure in the positive charged terminal of battery, described voltage detection module exports high level, conducting after described switch module reception high level, and described indicating module conducting also sends index signal; To release over the ground when described switch module and described indicating module form connected loop instantaneous high pressure; Meanwhile, described voltage absorption module absorbs described instantaneous high pressure;
When the positive charged terminal voltage of battery is normal, described voltage detection module output low level, ends when described switch module receives low level, and described indicating module cut-off, does not send indication information, described voltage absorption module cut-off.
Wherein in an embodiment, described voltage detection module comprises voltage stabilizing didoe ZD1 and divider resistance R1; Described voltage stabilizing didoe ZD1 connects with described divider resistance R1, the negative pole of described voltage stabilizing didoe ZD1 is the input of described voltage detection module, one end of described divider resistance R1 is the earth terminal of described voltage detection module, and the points of common connection of described voltage stabilizing didoe ZD1 and described divider resistance R1 is the output of described voltage detection module.
Wherein in an embodiment, described switch module comprises field effect transistor V1, and the grid of described field effect transistor V1, drain electrode and source electrode correspond to the control end of described switch module, input and output.
Wherein in an embodiment, described indicating module comprises light-emitting diode D2, and the positive pole of described light-emitting diode D2 and negative pole correspond to input and the earth terminal of described indicating module.
Wherein in an embodiment, described indicating module comprises loud speaker P1, and the positive pole of described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module.
Wherein in an embodiment, described indicating module comprises light-emitting diode D2 and loud speaker P1, and the positive pole after described light-emitting diode D2 is in parallel with described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module.
Wherein in an embodiment, described voltage absorption module comprises divider resistance R2, divider resistance R3, filter capacitor C2 and diode D3; Described divider resistance R2 connects with described diode D3, be connected with the common port of described diode D3 with described divider resistance R2 after described divider resistance R3 and described filter capacitor C2 connect, the common port of described divider resistance R2 and described filter capacitor C2 is the input of described voltage absorption module, the plus earth of described diode D3.
Wherein in an embodiment, also comprise filtration module, the positive charged terminal of the input termination battery of described filtration module, the earth terminal ground connection of described filtration module.
Wherein in an embodiment, described filtration module comprises electrochemical capacitor C1, and the positive pole of described electrochemical capacitor C1 and negative pole correspond to input and the earth terminal of described filtration module.
Wherein in an embodiment, also comprise diode D1, the positive pole of described diode D1 connects the positive charged terminal of battery, and the negative pole of described diode D1 connects the input of the input of described voltage detection module, the input of described switch module and described voltage absorption module respectively.
Above-mentioned battery overpressure absorbing circuit detects the voltage of the positive charged terminal of battery by voltage detection module, when detecting that the positive charged terminal of battery exports instantaneous high pressure, the conducting of voltage detection module control switch module, thus indicating module also conducting export index signal, represents that the positive charged terminal of now battery outputs instantaneous high pressure.Meanwhile, switch module and indicating module form conducting loop, instantaneous high pressure of releasing over the ground.And the also conducting absorb instantaneous high pressure of voltage absorption module.Therefore, when the positive charged terminal of battery exports instantaneous high pressure, battery overpressure absorbing circuit can absorb instantaneous high pressure, avoids the charging circuit of instantaneous high pressure to battery and battery to cause damage.
Accompanying drawing explanation
Fig. 1 is the module map of battery overpressure absorbing circuit;
Fig. 2 is the schematic diagram of battery overpressure absorbing circuit.
Embodiment
As shown in Figure 1, be the module map of battery overpressure absorbing circuit.
A kind of battery overpressure absorbing circuit, for absorbing the instantaneous high pressure that battery produces because charge circuit disconnects in charging process; Comprise the voltage detection module 101 of the positive charged terminal voltage for detecting battery, for sending the indicating module 105 of index signal, ending the voltage absorption module 107 of the instantaneous high pressure produced with the switch module 103 of conducting and the positive charged terminal for absorbing battery for controlling described indicating module 105.
The input of the input of described voltage detection module 101, the input of described switch module 103, described voltage absorption module 107 is all connected with the positive charged terminal of battery, the control end of switch module 103 described in the output termination of described voltage detection module 101, the input of indicating module 105 described in the output termination of described switch module 103, the equal ground connection of earth terminal of the earth terminal of described voltage detection module 101, the earth terminal of described indicating module 105, described voltage absorption module 107.
Described voltage detection module 101 is for detecting the voltage of the positive charged terminal of battery, when there is instantaneous high pressure in the positive charged terminal of battery, described voltage detection module 101 exports high level, described switch module 103 receives conducting after high level, and the conducting of described indicating module 105 also sends index signal; To release over the ground when described switch module 103 and described indicating module 105 form connected loop instantaneous high pressure; Meanwhile, described voltage absorption module 107 absorbs described instantaneous high pressure.
When the positive charged terminal voltage of battery is normal, described voltage detection module 101 output low level, ends when described switch module 103 receives low level, and described indicating module 105 ends, and does not send indication information, and described voltage absorption module 107 ends.
Battery overpressure absorbing circuit also comprises filtration module 109, the positive charged terminal of the input termination battery of described filtration module 109, the earth terminal ground connection of described filtration module 109.
Voltage detection module 101 is for detecting the output voltage of the positive charged terminal B+ of battery.Concrete, when the output voltage of the positive charged terminal B+ of battery is normal, voltage detection module 101 is ended, the output output low level of voltage detection module 101.When the output voltage of the positive charged terminal B+ of battery is instantaneous high pressure, voltage detection module 101 conducting, the output of voltage detection module 101 exports high level.
Switch module 103 is for controlling self conducting and cut-off according to the output level of voltage detection module 101.Concrete, when voltage detection module 101 output low level, switch module 103 ends, when voltage detection module 101 exports high level, and switch module 103 conducting.
Indicating module 105 is for sending index signal according to the conducting of switch module 103 and cut-off, and when switch module 103 conducting, indicating module 105 sends index signal, represents that the positive charged terminal B+ of battery outputs instantaneous high pressure.When switch module 103 ends, indicating module 105 does not send index signal, represents that the output voltage of the positive charged terminal B+ of battery is normal.
During switch module 103 conducting, form conducting loop with indicating module 105, now can release high pressure over the ground in switch module 103 and the conducting loop of indicating module 105, namely absorb instantaneous high pressure.
Voltage absorption module 107 for the conducting when the positive charged terminal B+ of battery exports instantaneous high pressure, and absorbs instantaneous high pressure.Concrete, when the positive charged terminal B+ output voltage of battery is normal, voltage absorption module 107 ends, and voltage absorption module 107 does not absorb voltage.When the positive charged terminal B+ of battery exports instantaneous high pressure, voltage absorption module 107 conducting, voltage absorption module 107 starts to absorb instantaneous high pressure.
Therefore, when the positive charged terminal B+ of battery exports instantaneous high pressure, the conducting loop that voltage absorption module 107 and switch module 103 and indicating module 105 forms all absorbs instantaneous high pressure, and the charging circuit for the protection of battery and battery is not subject to the damage of instantaneous high pressure.
Incorporated by reference to Fig. 2.
Voltage detection module 101 comprises voltage stabilizing didoe ZD1 and divider resistance R1; Described voltage stabilizing didoe ZD1 connects with described divider resistance R1, the negative pole of described voltage stabilizing didoe ZD1 is the input of described voltage detection module 101, one end of described divider resistance R1 is the earth terminal of described voltage detection module 101, and the points of common connection of described voltage stabilizing didoe ZD1 and described divider resistance R1 is the output of described voltage detection module 101.
Switch module 103 comprises field effect transistor V1, and the grid of described field effect transistor V1, drain electrode and source electrode correspond to the control end of described switch module 103, input and output.
In one embodiment, indicating module 105 comprises light-emitting diode D2, and the positive pole of described light-emitting diode D2 and negative pole correspond to input and the earth terminal of described indicating module 105.
In another embodiment, indicating module 105 comprises loud speaker P1, and the positive pole of described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module 105.
In yet another embodiment, indicating module 105 comprises light-emitting diode D2 and loud speaker P1, and the positive pole after described light-emitting diode D2 is in parallel with described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module 105.
Voltage absorption module 107 comprises divider resistance R2, divider resistance R3, filter capacitor C2 and diode D3; Described divider resistance R2 connects with described diode D3, be connected with the common port of described diode D3 with described divider resistance R2 after described divider resistance R3 and described filter capacitor C2 connect, the common port of described divider resistance R2 and described filter capacitor C2 is the input of described voltage absorption module 107, the plus earth of described diode D3.
Filtration module 109 comprises electrochemical capacitor C1, and the positive pole of described electrochemical capacitor C1 and negative pole correspond to input and the earth terminal of described filtration module 109.
Battery overpressure absorbing circuit also comprises diode D1, the positive pole of described diode D1 connects the positive charged terminal of battery, and the negative pole of described diode D1 connects the input of the input of described voltage detection module 101, the input of described switch module 103 and described voltage absorption module 107 respectively.
Based on above-mentioned all embodiments, the operation principle of battery overpressure absorbing circuit is as follows:
When the positive charged terminal B+ output voltage of battery is normal, voltage stabilizing didoe ZD1 ends, and diode D3 also ends.Therefore, field effect transistor V1 ends, and light-emitting diode D2 extinguishes, and loud speaker P1 does not work.Same, divider resistance R2, divider resistance R3 and filter capacitor C2 do not have electric current process, not the output voltage of the positive charged terminal B+ of consuming cells.Now, battery is in normal charging condition.
When the positive charged terminal B+ of battery exports instantaneous high pressure, voltage stabilizing didoe ZD1 reaches reverse turn-on voltages, the conducting of voltage stabilizing didoe ZD1 reverse breakdown.Instantaneous high pressure exports to voltage detection module 101, switch module 103 and voltage absorption module 107 by diode D1 again via after electrochemical capacitor C1 filtering.Concrete, instantaneous high pressure is added on divider resistance R1 via the voltage stabilizing didoe ZD1 of reverse breakdown conducting.After voltage stabilizing didoe ZD1 and divider resistance R1 dividing potential drop, the voltage at divider resistance R1 two ends exports to the grid of field effect transistor V1.The conducting when grid of field effect transistor V1 receives high voltage, therefore, field effect transistor V1 and light-emitting diode D2 and loud speaker P1 forms conducting loop.Light-emitting diode D2 lights, and loud speaker P1 sounds signal.B+ for the positive pole charging representing now battery outputs instantaneous high pressure.
Instantaneous high pressure exports to divider resistance R2 and diode D3 via diode D1, and diode D3 punctures conducting, and therefore divider resistance R2, divider resistance R3 and filter capacitor C2 form RC oscillating circuit, consumes instantaneous high pressure, until absorbed by instantaneous high pressure.
Above-mentioned battery overpressure absorbing circuit detects the voltage of the positive charged terminal of battery by voltage detection module 101, when detecting that the positive charged terminal of battery exports instantaneous high pressure, the conducting of voltage detection module 101 control switch module 103, thus indicating module 105 also conducting export index signal, represents that the positive charged terminal of now battery outputs instantaneous high pressure.Meanwhile, switch module 103 and indicating module 105 form conducting loop, instantaneous high pressure of releasing over the ground.And voltage absorption module 107 also conducting absorb instantaneous high pressure.Therefore, when the positive charged terminal of battery exports instantaneous high pressure, battery overpressure absorbing circuit can absorb instantaneous high pressure, avoids the charging circuit of instantaneous high pressure to battery and battery to cause damage.
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 (10)
1. a battery overpressure absorbing circuit, for absorbing the instantaneous high pressure that battery produces because charge circuit disconnects in charging process; It is characterized in that, comprising the voltage detection module of the positive charged terminal voltage for detecting battery, for sending the indicating module of index signal, ending the voltage absorption module of the instantaneous high pressure produced with the switch module of conducting and the positive charged terminal for absorbing battery for controlling described indicating module;
The input of the input of described voltage detection module, the input of described switch module, described voltage absorption module is all connected with the positive charged terminal of battery, the control end of switch module described in the output termination of described voltage detection module, the input of indicating module described in the output termination of described switch module, the equal ground connection of earth terminal of the earth terminal of described voltage detection module, the earth terminal of described indicating module, described voltage absorption module;
Described voltage detection module is for detecting the voltage of the positive charged terminal of battery, when there is instantaneous high pressure in the positive charged terminal of battery, described voltage detection module exports high level, conducting after described switch module reception high level, and described indicating module conducting also sends index signal; To release over the ground when described switch module and described indicating module form connected loop instantaneous high pressure; Meanwhile, described voltage absorption module absorbs described instantaneous high pressure;
When the positive charged terminal voltage of battery is normal, described voltage detection module output low level, ends when described switch module receives low level, and described indicating module cut-off, does not send indication information, described voltage absorption module cut-off.
2. battery overpressure absorbing circuit according to claim 1, is characterized in that, described voltage detection module comprises voltage stabilizing didoe ZD1 and divider resistance R1; Described voltage stabilizing didoe ZD1 connects with described divider resistance R1, the negative pole of described voltage stabilizing didoe ZD1 is the input of described voltage detection module, one end of described divider resistance R1 is the earth terminal of described voltage detection module, and the points of common connection of described voltage stabilizing didoe ZD1 and described divider resistance R1 is the output of described voltage detection module.
3. battery overpressure absorbing circuit according to claim 1, is characterized in that, described switch module comprises field effect transistor V1, and the grid of described field effect transistor V1, drain electrode and source electrode correspond to the control end of described switch module, input and output.
4. battery overpressure absorbing circuit according to claim 1, is characterized in that, described indicating module comprises light-emitting diode D2, and the positive pole of described light-emitting diode D2 and negative pole correspond to input and the earth terminal of described indicating module.
5. battery overpressure absorbing circuit according to claim 1, is characterized in that, described indicating module comprises loud speaker P1, and the positive pole of described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module.
6. battery overpressure absorbing circuit according to claim 1, it is characterized in that, described indicating module comprises light-emitting diode D2 and loud speaker P1, and the positive pole after described light-emitting diode D2 is in parallel with described loud speaker P1 and negative pole correspond to input and the earth terminal of described indicating module.
7. battery overpressure absorbing circuit according to claim 1, is characterized in that, described voltage absorption module comprises divider resistance R2, divider resistance R3, filter capacitor C2 and diode D3; Described divider resistance R2 connects with described diode D3, be connected with the common port of described diode D3 with described divider resistance R2 after described divider resistance R3 and described filter capacitor C2 connect, the common port of described divider resistance R2 and described filter capacitor C2 is the input of described voltage absorption module, the plus earth of described diode D3.
8. battery overpressure absorbing circuit according to claim 1, is characterized in that, also comprise filtration module, the positive charged terminal of the input termination battery of described filtration module, the earth terminal ground connection of described filtration module.
9. battery overpressure absorbing circuit according to claim 8, is characterized in that, described filtration module comprises electrochemical capacitor C1, and the positive pole of described electrochemical capacitor C1 and negative pole correspond to input and the earth terminal of described filtration module.
10. battery overpressure absorbing circuit according to claim 1, it is characterized in that, also comprise diode D1, the positive pole of described diode D1 connects the positive charged terminal of battery, and the negative pole of described diode D1 connects the input of the input of described voltage detection module, the input of described switch module and described voltage absorption module respectively.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310390567.XA CN104426143B (en) | 2013-08-30 | 2013-08-30 | Battery overpressure absorbing circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310390567.XA CN104426143B (en) | 2013-08-30 | 2013-08-30 | Battery overpressure absorbing circuit |
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| CN104426143A true CN104426143A (en) | 2015-03-18 |
| CN104426143B CN104426143B (en) | 2018-04-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106356823A (en) * | 2016-09-18 | 2017-01-25 | 无锡力芯微电子股份有限公司 | Surge protection circuit integrated in chip |
| CN107276136A (en) * | 2016-04-01 | 2017-10-20 | 联发科技股份有限公司 | charger circuit and power system |
| CN110739849A (en) * | 2019-10-17 | 2020-01-31 | 合肥联宝信息技术有限公司 | power supply circuits and electronic equipment |
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| CN2821988Y (en) * | 2005-07-29 | 2006-09-27 | 杭州瑞宝能源科技有限公司 | Lithium ion cell impedance continuous high voltage impact device |
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| CN107276136A (en) * | 2016-04-01 | 2017-10-20 | 联发科技股份有限公司 | charger circuit and power system |
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| CN110739849A (en) * | 2019-10-17 | 2020-01-31 | 合肥联宝信息技术有限公司 | power supply circuits and electronic equipment |
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| Publication number | Publication date |
|---|---|
| CN104426143B (en) | 2018-04-06 |
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