CN102832674B - Charging/discharging protection circuit of lithium battery - Google Patents
Charging/discharging protection circuit of lithium battery Download PDFInfo
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- CN102832674B CN102832674B CN201210341547.9A CN201210341547A CN102832674B CN 102832674 B CN102832674 B CN 102832674B CN 201210341547 A CN201210341547 A CN 201210341547A CN 102832674 B CN102832674 B CN 102832674B
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Abstract
The invention relates to a charging/discharging protection circuit of a lithium battery. The charging/discharging protection circuit comprises a charging/discharging controller (IC), a discharging control switch tube (Q1) and a charging control switch tube (Q2), wherein the charging/discharging controller (IC) is connected with an anode and a cathode of the lithium battery, a grid electrode of the discharging control switch tube (Q1) is connected with a discharging control output signal end (DO) of the charging/discharging controller (IC), a source electrode of the discharging control switch tube (Q1) is connected with the cathode of the lithium battery, a grid electrode of the charging control switch tube (Q2) is connected with a charging control output signal end (CO) of the charging/discharging controller (IC), a source electrode of the charging control switch tube (Q2) is connected with a cathode of a charger, and an anode of the charger is connected with the anode of the lithium battery; and the charging/discharging protection circuit is characterized by also comprising an oscillator, wherein an input end (IN) of the oscillator is connected with the discharging control output signal end of the charging/discharging controller (Q1), and an output end (OUT) of the oscillator is connected with the grid electrode of the charging control switch tube (Q2). Compared with the prior art, the charging/discharging protection circuit disclosed by the invention has the advantages that the time for switching on and switching off the charging control switch tube (Q2) can be controlled by regulating a duty ratio of the oscillator, and thus the purpose of controlling the charging current size can be reached.
Description
Technical field
The present invention relates to a kind of charge-discharge protection circuit of lithium battery.
Background technology
Existing lithium battery charge and discharge protective circuit, is generally made up of a charging control switch pipe, a discharge control switch pipe and special charging-discharging controller, the control circuit that charging-discharging controller can be made up of separate piece, also can be an integrating control chip.Under normal circumstances, the connected mode of they and charger and load has following three kinds of situations:
The first situation: the grid of discharge control switch pipe Q1 is connected with the control of discharge output signal end DO of charging-discharging controller IC, the grid of charging control switch pipe Q2 controls output signal end CO with the charging of charging-discharging controller IC and is connected, the source electrode of discharge control switch pipe Q1 is connected with the negative pole of lithium battery group, and the two ends of load are connected between the drain electrode of discharge control switch pipe Q1 and lithium battery group positive pole; The drain electrode of charging control switch pipe Q2 is connected with the negative pole of lithium battery group, the source electrode of charging control switch pipe Q2 is connected with the negative pole of charger CDQ, the positive pole of charger CDQ is connected with the positive pole of lithium battery group, charging-discharging controller IC monitors the voltage of lithium battery group and controls, shown in accompanying drawing 8 control of discharge output signal end DO and charging control output signal end CO; Its circuit working principle is: when lithium battery is in charged state, charging controls output signal end CO and exports high level, charging control switch pipe Q2 conducting, charger CDQ normally charges to lithium battery group, when lithium battery voltage is full of, charging controls output signal end CO output low level, and charging control switch pipe Q2 ends, charge circuit disconnects, and charger CDQ stops charging to lithium battery group; Under lithium battery is in discharge condition, control of discharge output signal end DO exports high level, discharge control switch pipe Q1 conducting, lithium battery is powered to load RL, when lithium battery voltage is down to critical voltage (as 2.55V), control of discharge output signal end DO output low level, discharge control switch pipe Q1 ends, and lithium battery group stops powering to load RL.
The second situation: with the first situation unlike, the drain electrode of discharge control switch pipe Q1 is connected with the drain electrode of charging control switch pipe Q2, shown in accompanying drawing 9, its charging operation principle is: charging controls output signal end CO and exports high level, charging control switch pipe Q2 conducting, when control of discharge output signal end DO exports high level, discharge control switch pipe Q1 conducting, charger CDQ normally charges to when lithium battery group, when control of discharge output signal end DO output low level, discharge control switch pipe Q1 ends, because the diode D of discharge control switch pipe Q1 inside exists, charger CDQ still can normally charge to lithium battery group, when lithium battery is full of, charging controls output signal end CO output low level, charging control switch pipe Q2 ends, charge circuit disconnects, charger CDQ stops charging to lithium battery group, electric discharge operation principle is identical with the first situation, that is: under lithium battery is in discharge condition, control of discharge output signal end DO exports high level, discharge control switch pipe Q1 conducting, lithium battery is powered to load RL, when lithium battery voltage is down to critical voltage (as 2.55V), and control of discharge output signal end DO output low level, discharge control switch pipe Q1 ends, and lithium battery group stops powering to load RL.
The third situation, with the second situation unlike, one end of load RL is connected with the source electrode of charging control switch pipe Q2, the other end of load RL is connected with lithium battery group positive pole, shown in Figure 10, its charging work is identical with the charging operation principle of the second situation, its electric discharge operation principle is: under lithium battery is in discharge condition, control of discharge output signal end DO exports high level, discharge control switch pipe Q1 conducting, charging controls output signal end CO and also exports high level, charging control switch pipe Q2 also conducting, and lithium battery is normally powered to load RL; When lithium battery voltage is down to critical voltage (as 2.55V), control of discharge output signal end DO output low level, discharge control switch pipe Q1 ends, and lithium battery group stops powering to load RL.
But, cause the voltage of lithium battery lower than normal critical charging voltage when lithium battery passes through often to place for a long time or run into other over-discharge situation, if carry out conventional current charging according to above-mentioned charging circuit bio-occlusion lithium battery, damage can be caused like this to lithium battery interior structure, easily make lithium battery group cannot recover normal work, thus affect the life-span of lithium battery group, because according to above-mentioned charging circuit to lithium cell charging, because the voltage of lithium battery is very low, if now routinely electric current to lithium cell charging, this situation very easily damages lithium battery interior structure, if and when lithium battery voltage is lower than normal critical charging voltage, small area analysis (such as charging current is the 1/10A of battery capacity) charging is carried out to lithium battery, then completely can by lithium cell charging to normal working voltage.
Summary of the invention
Technical problem to be solved by this invention is the charge-discharge protection circuit providing a kind of lithium battery for above-mentioned prior art; this charge-discharge protection circuit can carry out trickle charge lower than during normal critical charging voltage to lithium battery group, available protecting lithium battery group by the voltage of any joint lithium battery in lithium battery group.
The present invention solves the problems of the technologies described above adopted technical scheme: the charge-discharge protection circuit of this lithium battery, comprise and lithium battery group positive pole, the charging-discharging controller that negative pole connects, discharge control switch pipe, charging control switch pipe, the grid of discharge control switch pipe is connected with the control of discharge output signal end of charging-discharging controller, the source electrode of discharge control switch pipe is connected with lithium battery group negative pole, the grid of charging control switch pipe and the charging of charging-discharging controller control output signal end and are connected, the source electrode of charging control switch pipe is connected with the negative pole of charger, the positive pole of charger is connected with lithium battery group positive pole, it is characterized in that: also comprise an oscillator, the input of described oscillator is connected with the control of discharge output signal end of charging-discharging controller, the output of described oscillator is connected with the grid of charging control switch pipe, the control of discharge output signal that the output signal of this oscillator exports by charging-discharging controller controls, when control of discharge output signal end output low level, described oscillator exports oscillator signal, make the interval conducting of charging control switch pipe, thus change charging current, when control of discharge output signal end exports high level, described oscillator stops concussion, and non-output signal, charger routinely charging current charges to lithium battery group.
The circuit of described oscillator can have various ways to realize, wherein the most basic technical scheme is, described oscillator comprises: the 3rd field effect transistor, 4th field effect transistor, 5th field effect transistor, 6th field effect transistor, first resistance, second resistance, 3rd resistance, 4th resistance, first electric capacity and the second electric capacity, wherein, the grid of the 3rd field effect transistor is connected with the control of discharge output signal end of charging-discharging controller as the input of described oscillator, the source electrode of the 3rd field effect transistor is connected with lithium battery group positive pole, the drain electrode of the 3rd field effect transistor is connected with the first end of the 4th resistance, second end of the 4th resistance drains with the 5th field effect transistor and is connected, the source electrode of the 5th field effect transistor is connected with the source electrode of charging control switch pipe, the grid of the 5th field effect transistor is connected with the first end of the first electric capacity, second end of the first electric capacity is connected with the second end of the first resistance, first resistance, second resistance, the first end of the 3rd resistance is all connected with the first end of the 4th resistance, the first end of the second electric capacity is connected with the drain electrode of the 5th field effect transistor, second end of the second electric capacity is connected with the second end of the 3rd resistance, second end of the second resistance is connected with the grid of the 5th field effect transistor, the grid of the 4th field effect transistor is connected with the second end of the second electric capacity, the drain electrode of the 4th field effect transistor is connected with the second end of the first electric capacity, the source electrode of the 4th field effect transistor is connected with the source electrode of the 5th field effect transistor, the grid of the 6th field effect transistor is connected with the drain electrode of the 4th field effect transistor, the drain electrode of the 6th field effect transistor is connected with the grid of charging control switch pipe as the output of described oscillator, the source electrode of the 6th field effect transistor is connected with the source electrode of the 5th field effect transistor.
Another kind of technical scheme is, described oscillator comprises: the 7th field effect transistor, 5th resistance, 6th resistance, 7th resistance, 8th resistance, 3rd electric capacity and operational amplifier, wherein, the grid of the 7th field effect transistor is connected with the control of discharge output signal end of charging-discharging controller as the input of described oscillator, the source electrode of the 7th field effect transistor is connected with lithium battery group positive pole, the drain electrode of the 7th field effect transistor is connected with the first end of the 5th resistance, second end of the 5th resistance is connected with the in-phase input end of operational amplifier, the first end of the 6th resistance is connected with the in-phase input end of operational amplifier, second end of the 6th resistance is connected with the output of operational amplifier, the first end of the 7th resistance is connected with the in-phase input end of operational amplifier, second end of the 7th resistance is connected with the source electrode of charging control switch pipe, the first end of the 8th resistance is connected with the inverting input of operational amplifier, second end of the 8th resistance is connected with the output of operational amplifier, the first end of the 3rd electric capacity is connected with the inverting input of operational amplifier, second end of the 3rd electric capacity is connected with the source electrode of charging control switch pipe, the output of operational amplifier is connected with the grid of charging control switch pipe as the output of described oscillator.
Compared with prior art; the invention has the advantages that: by connecting an oscillator between the control of discharge output signal end and the grid of charging control switch pipe of charging-discharging controller; by regulating the duty ratio of oscillator; make oscillator operation in suitable duty ratio; realize carrying out trickle charge to lithium battery, available protecting lithium battery, and when the voltage of lithium battery is higher than normal critical voltage; oscillator stops concussion, carries out conventional current charging to lithium battery.
Accompanying drawing explanation
Fig. 1 is the block diagram of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention one;
Fig. 2 is the circuit theory diagrams of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention one;
Fig. 3 is the circuit theory diagrams of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention two;
Fig. 4 is the block diagram of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention three;
Fig. 5 is the circuit theory diagrams of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention four;
Fig. 6 is the block diagram of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention five;
Fig. 7 is the circuit theory diagrams of the charge-discharge protection circuit of lithium battery in the embodiment of the present invention six;
Fig. 8 is the circuit theory diagrams of charging and discharging lithium battery circuit in the first situation in prior art;
Fig. 9 is the circuit theory diagrams of charging and discharging lithium battery circuit in the second situation in prior art;
Figure 10 is the circuit theory diagrams of charging and discharging lithium battery circuit in the third situation in prior art.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment one
The charge protector of lithium battery as shown in Figure 1, it comprises the lithium battery group that multisection lithium battery BT1 ~ BTn connects, with lithium battery group positive pole, the charging-discharging controller IC that lithium battery group negative pole connects, discharge control switch pipe Q1, charging control switch pipe Q2 and oscillator, wherein, the grid of discharge control switch pipe Q1 is connected with the control of discharge output signal end DO of charging-discharging controller IC, the source electrode of discharge control switch pipe Q1 is connected with lithium battery group negative pole, the drain electrode of discharge control switch pipe Q1 is connected with the drain electrode of charging control switch pipe Q2, the grid of charging control switch pipe Q2 controls output signal end CO with the charging of charging-discharging controller IC and is connected, the source electrode of charging control switch pipe Q2 is connected with the negative pole of charger CDQ, the positive pole of charger CDQ is connected with lithium battery group positive pole, the input IN of oscillator is connected with the grid of discharge control switch pipe Q1, the output OUT of described oscillator is connected with the grid of charging control switch pipe Q2, the two ends of load RL are connected between the source electrode of charging control switch pipe Q2 and lithium battery group positive pole.Charging-discharging controller can be the control circuit of separate piece composition, also can be an integrating control chip.
In the present embodiment, described oscillator comprises: the 3rd field effect transistor Q3, 4th field effect transistor Q4, 5th field effect transistor Q5, 6th field effect transistor Q6, first resistance R1, second resistance R2, 3rd resistance R3, 4th resistance R4, first electric capacity C1 and the second electric capacity C2, shown in Figure 2, wherein, the grid of the 3rd field effect transistor Q3 is connected with the control of discharge output signal end DO of charging-discharging controller IC as the input IN of described oscillator, the source electrode of the 3rd field effect transistor Q3 is connected with lithium battery group positive pole, the drain electrode of the 3rd field effect transistor Q3 is connected with the first end of the 4th resistance (R4), second end of the 4th resistance R4 drains with the 5th field effect transistor Q5 and is connected, the source electrode of the 5th field effect transistor Q5 is connected with the source electrode of charging control switch pipe Q2, the grid of the 5th field effect transistor Q5 is connected with the first end of the first electric capacity C1, second end of the first electric capacity C1 is connected with second end of the first resistance R1, first resistance R1, second resistance R2, the first end of the 3rd resistance R3 is all connected with the first end of the 4th resistance R4, the first end of the second electric capacity C2 is connected with the drain electrode of the 5th field effect transistor Q5, second end of the second electric capacity C2 is connected with second end of the 3rd resistance R3, second end of the second resistance R2 is connected with the grid of the 5th field effect transistor (Q5), the grid of the 4th field effect transistor Q4 is connected with second end of the second electric capacity C2, the drain electrode of the 4th field effect transistor Q4 is connected with second end of the first electric capacity C1, the source electrode of the 4th field effect transistor Q4 is connected with the source electrode of the 5th field effect transistor Q5, the grid of the 6th field effect transistor Q6 is connected with the drain electrode of the 4th field effect transistor Q4, the drain electrode of the 6th field effect transistor Q6 is connected with the grid of charging control switch pipe Q2 as the output OUT of described oscillator, the source electrode of the 6th field effect transistor Q6 is connected with the source electrode of the 5th field effect transistor Q5.
The operation principle of foregoing circuit is: when the voltage of batteries each in lithium battery group is all in normal voltage, control of discharge output signal end DO exports high level, oscillator does not work, non-output signal, and in circuit, charger CDQ charges to lithium battery group according to normal charging current; When the voltage of a joint lithium battery any in BT1 ~ BTn is lower than critical charging voltage, control of discharge output signal end DO output low level, oscillator is started working, oscillator output end OUT exports oscillator signal, by adjusting the duty ratio of oscillator, just can control conducting and the deadline of charging control switch pipe Q2, thus reach the object controlling charging current.
Embodiment two
With embodiment one unlike, described oscillator comprises: the 7th field effect transistor Q7, 5th resistance R5, 6th resistance R6, 7th resistance R7, 8th resistance R8, 3rd electric capacity C3 and operational amplifier CP, shown in Figure 3, wherein, the grid of the 7th field effect transistor Q7 is connected with the control of discharge output signal end DO of charging-discharging controller IC as the input IN of described oscillator, the source electrode of the 7th field effect transistor Q7 is connected with lithium battery group positive pole, the drain electrode of the 7th field effect transistor Q7 is connected with the first end of the 5th resistance R5, second end of the 5th resistance R5 is connected with the in-phase input end of operational amplifier CP, the first end of the 6th resistance R6 is connected with the in-phase input end of operational amplifier CP, second end of the 6th resistance R6 is connected with the output of operational amplifier CP, the first end of the 7th resistance R7 is connected with the in-phase input end of operational amplifier CP, second end of the 7th resistance R7 is connected with the source electrode of charging control switch pipe Q2, the first end of the 8th resistance R8 is connected with the inverting input of operational amplifier CP, second end of the 8th resistance R8 is connected with the output of operational amplifier CP, the first end of the 3rd electric capacity C3 is connected with the inverting input of operational amplifier CP, second end of the 3rd electric capacity C3 is connected with the source electrode of charging control switch pipe Q2, the output of operational amplifier CP is connected with the grid of charging control switch pipe Q2 as the output OUT of described oscillator.
The operation principle of foregoing circuit is identical with embodiment one.
Embodiment three
With embodiment one unlike, the two ends of load RL are connected between the drain electrode of charging control switch pipe Q2 and lithium battery group positive pole, shown in Figure 4.
The operation principle of foregoing circuit is identical with embodiment one.
Embodiment four
With embodiment two unlike, the two ends of load RL are connected between the drain electrode of charging control switch pipe Q2 and lithium battery group positive pole, shown in Figure 5.
The operation principle of foregoing circuit is identical with embodiment one.
Embodiment five
With embodiment one unlike, the drain electrode of charging control switch pipe Q2 is connected with lithium battery group negative pole, and the two ends of load RL are connected between the drain electrode of discharge control switch pipe Q1 and lithium battery group positive pole, shown in Figure 6.
The operation principle of foregoing circuit is identical with embodiment one.
Embodiment six
With embodiment two unlike, the drain electrode of charging control switch pipe Q2 is connected with lithium battery group negative pole, and the two ends of load RL are connected between the drain electrode of discharge control switch pipe Q1 and lithium battery group positive pole, shown in Figure 7.
The operation principle of foregoing circuit is identical with embodiment one.
Claims (1)
1. the charge-discharge protection circuit of a lithium battery, comprise and lithium battery group positive pole, the charging-discharging controller (IC) that lithium battery group negative pole connects, discharge control switch pipe (Q1), charging control switch pipe (Q2), the grid of discharge control switch pipe (Q1) is connected with the control of discharge output signal end (DO) of charging-discharging controller (IC), the source electrode of discharge control switch pipe (Q1) is connected with lithium battery group negative pole, grid and the charging of charging-discharging controller (IC) of charging control switch pipe (Q2) control output signal end (CO) and are connected, the source electrode of charging control switch pipe (Q2) is connected with the negative pole of charger, the positive pole of charger is connected with lithium battery group positive pole, it is characterized in that: also comprise an oscillator, the input (IN) of described oscillator is connected with the control of discharge output signal end (DO) of charging-discharging controller, the output (OUT) of described oscillator is connected with the grid of charging control switch pipe (Q2), the control of discharge output signal that the output signal of this oscillator exports by charging-discharging controller controls, when control of discharge output signal end output low level, described oscillator exports oscillator signal, make charging control switch pipe (Q2) interval conducting, thus change charging current, when control of discharge output signal end exports high level, described oscillator stops concussion, non-output signal, and charger routinely charging current charges to lithium battery group, the circuit of described oscillator is one in following two circuit:
Described oscillator comprises: the 3rd field effect transistor (Q3), 4th field effect transistor (Q4), 5th field effect transistor (Q5), 6th field effect transistor (Q6), first resistance (R1), second resistance (R2), 3rd resistance (R3), 4th resistance (R4), first electric capacity (C1) and the second electric capacity (C2), wherein, the grid of the 3rd field effect transistor (Q3) is connected with the control of discharge output signal end of charging-discharging controller as the input (IN) of described oscillator, the source electrode of the 3rd field effect transistor (Q3) is connected with lithium battery group positive pole, the drain electrode of the 3rd field effect transistor (Q3) is connected with the first end of the 4th resistance (R4), second end of the 4th resistance (R4) drains with the 5th field effect transistor (Q5) and is connected, the source electrode of the 5th field effect transistor (Q5) is connected with the source electrode of charging control switch pipe (Q2), the grid of the 5th field effect transistor (Q5) is connected with the first end of the first electric capacity (C1), second end of the first electric capacity (C1) is connected with the second end of the first resistance (R1), first resistance (R1), second resistance (R2), the first end of the 3rd resistance (R3) is all connected with the first end of the 4th resistance (R4), the first end of the second electric capacity (C2) is connected with the drain electrode of the 5th field effect transistor (Q5), second end of the second electric capacity (C2) is connected with the second end of the 3rd resistance (R3), second end of the second resistance (R2) is connected with the grid of the 5th field effect transistor (Q5), the grid of the 4th field effect transistor (Q4) is connected with the second end of the second electric capacity (C2), the drain electrode of the 4th field effect transistor (Q4) is connected with the second end of the first electric capacity (C1), the source electrode of the 4th field effect transistor (Q4) is connected with the source electrode of the 5th field effect transistor (Q5), the grid of the 6th field effect transistor (Q6) is connected with the drain electrode of the 4th field effect transistor (Q4), the drain electrode of the 6th field effect transistor (Q6) is connected with the grid of charging control switch pipe (Q2) as the output (OUT) of described oscillator, the source electrode of the 6th field effect transistor (Q6) is connected with the source electrode of the 5th field effect transistor (Q5),
Described oscillator comprises: the 7th field effect transistor (Q7), 5th resistance (R5), 6th resistance (R6), 7th resistance (R7), 8th resistance (R8), 3rd electric capacity (C3) and operational amplifier (CP), wherein, the grid of the 7th field effect transistor (Q7) is connected with the control of discharge output signal end of charging-discharging controller as the input (IN) of described oscillator, the source electrode of the 7th field effect transistor (Q7) is connected with lithium battery group positive pole, the drain electrode of the 7th field effect transistor (Q7) is connected with the first end of the 5th resistance (R5), second end of the 5th resistance (R5) is connected with the in-phase input end of operational amplifier (CP), the first end of the 6th resistance (R6) is connected with the in-phase input end of operational amplifier (CP), second end of the 6th resistance (R6) is connected with the output of operational amplifier (CP), the first end of the 7th resistance (R7) is connected with the in-phase input end of operational amplifier (CP), second end of the 7th resistance (R7) is connected with the source electrode of charging control switch pipe (Q2), the first end of the 8th resistance (R8) is connected with the inverting input of operational amplifier (CP), second end of the 8th resistance (R8) is connected with the output of operational amplifier (CP), the first end of the 3rd electric capacity (C3) is connected with the inverting input of operational amplifier (CP), second end of the 3rd electric capacity (C3) is connected with the source electrode of charging control switch pipe (Q2), the output of operational amplifier (CP) is connected with the grid of charging control switch pipe (Q2) as the output (OUT) of described oscillator.
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| CN201210341547.9A CN102832674B (en) | 2012-09-14 | 2012-09-14 | Charging/discharging protection circuit of lithium battery |
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| CN201210341547.9A CN102832674B (en) | 2012-09-14 | 2012-09-14 | Charging/discharging protection circuit of lithium battery |
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| CN108282010A (en) * | 2018-03-06 | 2018-07-13 | 北京小米移动软件有限公司 | Anticorrosion circuit and charger for charging interface |
| CN110011378A (en) * | 2019-04-19 | 2019-07-12 | 深圳市山河动力电子有限公司 | A kind of lithium battery protection board overcurrent detection protection circuit |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101227100A (en) * | 2007-12-25 | 2008-07-23 | 黄承昂 | Voltage regulator capable of presetting charged state |
| CN101383521A (en) * | 2007-07-05 | 2009-03-11 | 凹凸电子（武汉）有限公司 | Charging circuit, electronic device and battery pack charging process |
| CN202798079U (en) * | 2012-09-14 | 2013-03-13 | 何岳明 | Charging/discharging protection circuit of lithium battery |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8164309B2 (en) * | 2008-08-08 | 2012-04-24 | O2Micro, Inc | Battery charging system with trickle charging/discharging control |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101383521A (en) * | 2007-07-05 | 2009-03-11 | 凹凸电子（武汉）有限公司 | Charging circuit, electronic device and battery pack charging process |
| CN101227100A (en) * | 2007-12-25 | 2008-07-23 | 黄承昂 | Voltage regulator capable of presetting charged state |
| CN202798079U (en) * | 2012-09-14 | 2013-03-13 | 何岳明 | Charging/discharging protection circuit of lithium battery |
Non-Patent Citations (1)
| Title |
|---|
| 多谐振荡器电路集锦;姚斌;《应用电路》;20030615;第36-37页 * |
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Effective date of registration: 20170510 Address after: 315181, Zhejiang, Ningbo province Haishu district town of water side street village Patentee after: Ningbo Tianhong Electronics Co.,Ltd. Address before: 315181, Zhejiang, Yinzhou District, Ningbo Province town of Ningbo Sea King Electric Appliance Co., Ltd. Patentee before: He Yueming |
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