CN203826946U - Cell explosionproof circuit and cell charging circuit - Google Patents

Cell explosionproof circuit and cell charging circuit Download PDF

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Publication number
CN203826946U
CN203826946U CN201420244269.XU CN201420244269U CN203826946U CN 203826946 U CN203826946 U CN 203826946U CN 201420244269 U CN201420244269 U CN 201420244269U CN 203826946 U CN203826946 U CN 203826946U
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battery
module
input
capacitor
output
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宋小平
马昂
李凤石
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Beijing Tocel Electronics Co Ltd
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Beijing Tocel Electronics Co Ltd
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Abstract

The utility model relates to a cell explosionproof circuit and a cell charging circuit; when a load is in short circuit, the voltage of an electric electronic switch Q1 output end approaches the voltage of a cell cathode, and a resistor R9 and a feedback resistor R15 are controlled to divide the voltage, thereby conducting a feedback control switch Q3; the feedback control switch Q3 is conducted to generate a continuously stepping high level on a control resistor R13, so the electric electronic switch Q1 is in a stop state, thereby cutting the load current and preventing the electric electronic switch Q1 from being damaged; in addition, cell electricity passes a current limiting resistor R7, the control resistor R9 and the feedback resistor R15 and is released as a small safe current, thereby preventing cell secondary damage caused by unreleased electricity stored in the cell; moreover, an accurate reference voltage is not needed, so the circuit can reliably limit the load current, and all power consumption cannot load on the electronic switch, thus causing electronic switch overheat damage.

Description

Battery anti-explosion circuit and battery charger
Technical field
The utility model relates to a kind of battery anti-explosion technology.Specifically a kind of battery anti-explosion circuit and battery charger.
Background technology
In the use procedure of battery, conventionally have two kinds of situations can cause the blast of battery: the first, inside battery flatulence causes battery explosion; The second, the excessive battery explosion that causes of load current of battery.For the first situation, inside battery is equipped with explosion-protection equipment, can effectively avoid battery explosion; For the second situation, need to avoid the excessive battery explosion of avoiding of load current.
As shown in Figure 1, Chinese patent literature CN202759272U discloses a kind of anti-explosion battery Limited Current circuit, this main circuit will comprise: the first comparator U1 and the second comparator U2, the first electronic switch Q1 and the second electronic switch Q2, protective resistance R1 and current sampling resistor R2; Meanwhile, the reference voltage of given the first comparator U1 is V1, and the reference voltage of given the second comparator U2 is V2.This circuit changes load current value into a certain proportion of magnitude of voltage VR2 by current sampling resistor R2, and the size of the first comparator U1 comparative voltage VR2 and reference voltage V 1 is controlled electronic switch Q1 and turn-offed; The second comparator U2 is the output end voltage VOUT of the second electronic switch Q2 and the size of reference voltage V 2 relatively, controls electronic switch Q2 and turn-offs.When in the normal situation of load, the first electronic switch Q1 and the situation of the second electronic switch Q2 in saturation conduction, load current flow through the first electronic switch Q1 and the second electronic switch Q2; In the time of load short circuits; voltage VR2 increases gradually; after relatively exporting by the first comparator U1, will cause the dynamic electric resistor of the first electronic switch Q1 to increase gradually, this has just been avoided load current excessive; simultaneously; along with the dynamic electric resistor of the first electronic switch Q1 increases gradually, voltage VOUT will decline gradually, after relatively exporting by the second comparator U2; will cause the shutoff of electronic switch Q2, this has just cut off load current and has protected the first electronic switch Q1.In the disclosed anti-explosion battery Limited Current of above-mentioned patent documentation circuit, after battery breaks down, excision fault before, because described Limited Current circuit is in cut-off state, cause the electric weight of battery to be stored in battery and cannot to discharge, likely produce the secondary harm of battery; Simultaneously, in the disclosed anti-explosion battery Limited Current of above-mentioned patent documentation circuit, need first given two reference voltages accurately, could control accurately the shutoff of electronic switch, if given reference voltage is inaccurate, can not control accurately the shutoff of electronic switch, will cause described Limited Current circuit can not play the effect of restriction load current, and will cause all power consumptions to be carried on electronic switch, cause the overheated damage of electronic switch.
Utility model content
For this reason, technical problem to be solved in the utility model is that Limited Current circuit of the prior art may produce the secondary harm of battery and may not play the effect of restriction load current and cause the overheated damage of electronic switch, thereby proposes a kind of battery anti-explosion circuit and battery charger.
For solving the problems of the technologies described above, the technical solution of the utility model is as follows:
A kind of battery anti-explosion circuit, comprising:
At least one Limited Current module, described Limited Current module comprises an input and an output, the input of described Limited Current module is connected with the positive pole of battery;
Described Limited Current module specifically comprises: current-limiting resistance R7, and protective resistance R10, controlling resistance R9, feedback resistance R15, controlling resistance R13, electronic power switch Q1 and FEEDBACK CONTROL switch Q3, wherein,
Described electronic power switch Q1 and described FEEDBACK CONTROL switch Q3 include input, output and control end, and in the time that the relative voltage between input and the control end of described electronic power switch Q1 is greater than its threshold voltage threshold value, described electronic power switch Q1 conducting; When relative voltage between input and the control end of described FEEDBACK CONTROL switch Q3 is greater than its threshold voltage threshold value, described FEEDBACK CONTROL switch Q3 conducting;
One end of described current-limiting resistance R7 be connected with one end of described protective resistance R10 and their tie point as the input of described Limited Current module;
The other end of described current-limiting resistance R7 is connected with one end of described controlling resistance R9 and their tie point is connected with the input of described electronic power switch Q1;
The other end of described protective resistance R10 is connected with the input of described FEEDBACK CONTROL switch Q3;
The other end of described controlling resistance R9 is connected with the control end of described FEEDBACK CONTROL switch Q3 and their tie point is connected with one end of described feedback resistance R15;
The other end of described feedback resistance R15 is connected with the output of described electronic power switch Q1, and their tie point is as the output of described Limited Current module;
One end of described controlling resistance R13 is connected with the output of described FEEDBACK CONTROL switch Q3, and their tie point is connected with the control end of described electronic power switch Q1;
The other end of described controlling resistance R13 is connected with the negative pole of battery.
Described a kind of battery anti-explosion circuit, described Limited Current module is two, two described Limited Current modules are connected in series.
Described a kind of battery anti-explosion circuit; also comprise overvoltage protective module; described overvoltage protective module comprises an input, an output and an earth terminal; the input of described overvoltage protective module is all connected with the output of described Limited Current module with output, and the earth terminal of described overvoltage protective module is connected with battery cathode.
Described a kind of battery anti-explosion circuit; also comprise overcurrent protection module; described overcurrent protection module comprises an input and output; the input of described overcurrent protection module is connected with the output of described Limited Current module, and the output of described overcurrent protection module is for being connected with one end of load.
Described a kind of battery anti-explosion circuit, also comprises filter capacitor C8, and one end of described filter capacitor C8 is connected with the positive pole of described battery, and the other end of described filter capacitor C8 is connected with the negative pole of described battery.
Described a kind of battery anti-explosion circuit, described overvoltage protective module comprises: capacitor C 9, capacitor C 10, overvoltage protection diode D3, wherein,
One end of described capacitor C 9, one end of described capacitor C 10 and the negative electrode of described overvoltage protection diode D3 are all connected, and their tie point is as input and the output of described overvoltage protective module;
The other end of described capacitor C 9, the other end of described capacitor C 10 and the anode of described overvoltage protection diode D3 be all connected and their tie point as the earth terminal of described overvoltage protective module.
Described a kind of battery anti-explosion circuit; in described overvoltage protective module, also comprise overvoltage protection diode D4; the negative electrode of described overvoltage protection diode D4 is connected with the negative electrode of described overvoltage protection diode D3, and the anode of described overvoltage protection diode D4 is connected with the anode of described overvoltage protection diode D3.
Described a kind of battery anti-explosion circuit; described overcurrent protection module is resettable fuse F1; one end of described resettable fuse F1 is as the input of described overcurrent protection module, and the other end of described resettable fuse F1 is as the output of described overcurrent protection module.
Described a kind of battery anti-explosion circuit, described electronic power switch Q1 is P-channel enhancement type metal-oxide-semiconductor, described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.
A kind of battery charger, described battery charger comprises above-mentioned arbitrary described battery anti-explosion circuit.
Described a kind of battery charger, also comprises:
Rectifier diode D1, the anode of described rectifier diode D1 is connected with the output of external DC charging power supply, and the negative electrode of described rectifier diode D1 is connected with the input of charging chip.
Described a kind of battery charger, also comprises rectifier diode D2, and the anode of described rectifier diode D2 is directly connected with the negative electrode of described rectifier diode D1, and the negative electrode of described rectifier diode D2 is connected with the input of described charging chip.
Described a kind of battery charger, also comprises capacitor C 1, and described capacitor C 1 one end is directly connected with the negative electrode of described rectifier diode D2, the other end ground connection of described capacitor C 1.
Described a kind of battery charger, comprises capacitor C 2, and described capacitor C 2 is connected in parallel with described capacitor C 1.
Technique scheme of the present utility model has the following advantages compared to existing technology:
(1) the utility model provides a kind of battery anti-explosion circuit and battery charger, in the time that load is normal, because draw on controlling resistance R9, so FEEDBACK CONTROL switch Q3 is in cut-off state, simultaneously, because controlling resistance R13 pulls down to ground, make electronic power switch Q1 conducting, electric current is flowed through current-limiting resistance R7 and electronic power switch Q1 to load.In the time of load short circuits, the voltage of electronic power switch Q1 output approaches the voltage of battery cathode, controlling resistance R9 and feedback resistance R15 carry out dividing potential drop to the voltage of battery, make relative voltage between the input of FEEDBACK CONTROL switch Q3 and control end be greater than its threshold voltage threshold value, FEEDBACK CONTROL switch Q3 conducting.Due to the conducting of FEEDBACK CONTROL switch Q3; one part of current is flowed through protective resistance R10, FEEDBACK CONTROL switch Q3 and controlling resistance R13 to battery cathode; simultaneously; due to the conducting of FEEDBACK CONTROL switch Q3; will on controlling resistance R13, produce a high level; the control end that is electronic power switch Q1 is high level, and along with constantly raising of this high level, electronic power switch Q1 will there will be incomplete conducting state or cut-off state.In the time of the state of electronic power switch Q1 in incomplete conducting, the internal resistance meeting of electronic power switch Q1 is very large, and now flow through current-limiting resistance R7 and electronic power switch Q1 will be limited to the electric current of load, has played the excessive effect of restriction load current; When electronic power switch Q1 is during in cut-off state; directly cut off load current; protect electronic power switch Q1 can not to be damaged; simultaneously; battery electric quantity discharges with the electric current of less safety through current-limiting resistance R7, controlling resistance R9 and feedback resistance R15; avoid the electric weight of battery to be stored in battery and cannot to discharge, likely produced the problem of the secondary harm of battery.The utility model battery electric quantity discharges with the electric current of less safety through current-limiting resistance R7, controlling resistance R9 and feedback resistance R15, avoid the electric weight of battery to be stored in battery and cannot to discharge, cause battery to produce the problem of secondary harm, simultaneously, due to without given accurate reference voltage, ensure that circuit can limit load current reliably, and can not cause all power consumptions to be carried on electronic switch, caused the overheated damage of electronic switch.
(2) the utility model provides a kind of battery anti-explosion circuit and battery charger, two Limited Current modules are set, further ensure the reliability of circuit, in the time that one of them Limited Current module lost efficacy, still can ensure that circuit limits load current accurately.
(3) the utility model provides a kind of battery anti-explosion circuit and battery charger, arrange overvoltage protective module, avoids producing too high voltages in circuit the device of breaking.
(4) the utility model provides a kind of battery anti-explosion circuit and battery charger, arrange overcurrent protection module, in the time there is large electric current in circuit, cuts off in time load, ensured the safety of circuit.
(5) the utility model provides a kind of battery anti-explosion circuit and battery charger, arrange filter capacitor C8, makes the electric current of battery output more steady, is beneficial to the stable of load.
(6) the utility model provides a kind of battery anti-explosion circuit and battery charger, the circuit of overvoltage protective module is simple, and two electric capacity and an overvoltage protection diode, saved cost.
(7) the utility model provides a kind of battery anti-explosion circuit and battery charger, in overvoltage protective module, arrange two overvoltage protection diodes, improves the reliability of overvoltage protective module.
(8) the utility model provides a kind of battery anti-explosion circuit and battery charger; in overcurrent protection module; utilize resettable fuse F1 to realize the object of overcurrent protection; in the time there is large electric current in circuit; cut off in time load, ensured the safety of circuit, in the time that electric current in circuit recovers normal; restore electricity, easy to use.
(9) the utility model provides a kind of battery anti-explosion circuit and battery charger, electronic power switch Q1 is P-channel enhancement type metal-oxide-semiconductor, described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.Because FEEDBACK CONTROL switch Q3 place does not need to use power electronic device, the price of triode, lower than power electronic device, has been saved cost.
(10) a kind of battery charger that the utility model provides, by rectifier diode is set, has avoided the reverse polarity connection due to external DC charging power supply, and the situation that burns out charging chip occurs; Ensured, in the time that a rectifier diode lost efficacy, still can avoid the reverse polarity connection due to external DC charging power supply by two rectifier diodes are set, the situation that burns out charging chip occurs, the fail safe that has improved circuit.
(11) a kind of battery charger that the utility model provides, by capacitor C 1 is set, carries out filtering to charging current; By two electric capacity in parallel are set, make filter effect better, and in the time of one of them condenser failure, ensured carrying out smoothly of filtering.
Brief description of the drawings
For content of the present utility model is more likely to be clearly understood, according to specific embodiment of the utility model also by reference to the accompanying drawings, the utility model is described in further detail, wherein below
Fig. 1 is known anti-explosion battery Limited Current circuit;
Fig. 2 is the circuit structure diagram of a kind of battery anti-explosion circuit that comprises a Limited Current module of an embodiment of the utility model;
Fig. 3 is the circuit structure diagram of a kind of battery anti-explosion circuit that comprises two Limited Current modules of an embodiment of the utility model;
Fig. 4 is the overvoltage crowbar structure chart that comprises an overvoltage protection diode in a kind of battery anti-explosion circuit of an embodiment of the utility model;
Fig. 5 is the overvoltage crowbar structure chart that comprises two overvoltage protection diodes in a kind of battery anti-explosion circuit of an embodiment of the utility model;
Fig. 6 is the structure chart of the battery charger of an embodiment of the utility model.
Embodiment
Embodiment 1
As a kind of battery anti-explosion circuit of an embodiment of the utility model, as shown in Figure 2, the electronic power switch Q1 shown in figure is P-channel enhancement type metal-oxide-semiconductor, and described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.The battery anti-explosion circuit of the present embodiment comprises:
A Limited Current module, described Limited Current module comprises an input and an output, the input of described Limited Current module is connected with the positive pole of battery.
Described Limited Current module specifically comprises: current-limiting resistance R7, and protective resistance R10, controlling resistance R9, feedback resistance R15, controlling resistance R13, electronic power switch Q1 and FEEDBACK CONTROL switch Q3, wherein,
Described electronic power switch Q1 and described FEEDBACK CONTROL switch Q3 include input, output and control end, and in the time that the relative voltage between input and the control end of described electronic power switch Q1 is greater than its threshold voltage threshold value, described electronic power switch Q1 conducting; When relative voltage between input and the control end of described FEEDBACK CONTROL switch Q3 is greater than its threshold voltage threshold value, described FEEDBACK CONTROL switch Q3 conducting;
One end of described current-limiting resistance R7 be connected with one end of described protective resistance R10 and their tie point as the input of described Limited Current module;
The other end of described current-limiting resistance R7 is connected with one end of described controlling resistance R9 and their tie point is connected with the input of described electronic power switch Q1;
The other end of described protective resistance R10 is connected with the input of described FEEDBACK CONTROL switch Q3;
The other end of described controlling resistance R9 is connected with the control end of described FEEDBACK CONTROL switch Q3 and their tie point is connected with one end of described feedback resistance R15;
The other end of described feedback resistance R15 is connected with the output of described electronic power switch Q1, and their tie point is as the output of described Limited Current module;
One end of described controlling resistance R13 is connected with the output of described FEEDBACK CONTROL switch Q3, and their tie point is connected with the control end of described electronic power switch Q1;
The other end of described controlling resistance R13 is connected with battery cathode.
A kind of battery anti-explosion circuit that the utility model provides, in the time that load is normal, because draw on controlling resistance R9, so FEEDBACK CONTROL switch Q3 is in cut-off state, simultaneously, because controlling resistance R13 pulls down to ground, make electronic power switch Q1 conducting, electric current is flowed through current-limiting resistance R7 and electronic power switch Q1 to load.In the time of load short circuits, the voltage of electronic power switch Q1 output approaches the voltage of battery cathode, controlling resistance R9 and feedback resistance R15 carry out dividing potential drop to the voltage of battery, make relative voltage between the input of FEEDBACK CONTROL switch Q3 and control end be greater than its threshold voltage threshold value, FEEDBACK CONTROL switch Q3 conducting.Due to the conducting of FEEDBACK CONTROL switch Q3; one part of current is flowed through protective resistance R10, FEEDBACK CONTROL switch Q3 and controlling resistance R13 to battery cathode; simultaneously; due to the conducting of FEEDBACK CONTROL switch Q3; will on controlling resistance R13, produce a high level; the control end that is electronic power switch Q1 is high level, and along with constantly raising of this high level, electronic power switch Q1 will there will be incomplete conducting state or cut-off state.In the time of the state of electronic power switch Q1 in incomplete conducting, the internal resistance meeting of electronic power switch Q1 is very large, and now flow through current-limiting resistance R7 and electronic power switch Q1 will be limited to the electric current of load, has played the excessive effect of restriction load current; When electronic power switch Q1 is during in cut-off state; directly cut off load current; protect electronic power switch Q1 can not to be damaged; simultaneously; battery electric quantity discharges with the electric current of less safety through current-limiting resistance R7, controlling resistance R9 and feedback resistance R15; avoid the electric weight of battery to be stored in battery and cannot to discharge, likely produced the problem of the secondary harm of battery.The utility model battery electric quantity discharges with the electric current of less safety through current-limiting resistance R7, controlling resistance R9 and feedback resistance R15, avoid the electric weight of battery to be stored in battery and cannot to discharge, cause battery to produce the problem of secondary harm, simultaneously, due to without given accurate reference voltage, ensure that circuit can limit load current reliably, and can not cause all power consumptions to be carried on electronic switch, caused the overheated damage of electronic switch.
Embodiment 2
As shown in Figure 3, as a kind of battery anti-explosion circuit of an embodiment of the utility model, on the basis of above-described embodiment 1, described Limited Current module is two, and two described Limited Current modules are connected in series.
A kind of battery anti-explosion circuit that the utility model provides, arranges two Limited Current modules, has further ensured the reliability of circuit, in the time that one of them Limited Current module lost efficacy, still can ensure that circuit limits load current accurately.
Embodiment 3
As a kind of battery anti-explosion circuit of an embodiment of the utility model; on the basis of above-described embodiment 1 or 2; also comprise overvoltage protective module; described overvoltage protective module comprises an input, an output and an earth terminal; the input of described overvoltage protective module is all connected with the output of described Limited Current module with output, and the earth terminal of described overvoltage protective module is connected with battery cathode.
A kind of battery anti-explosion circuit that the utility model provides, arranges overvoltage protective module, avoids producing too high voltages in circuit the device of breaking.
Embodiment 4
As a kind of battery anti-explosion circuit of an embodiment of the utility model; on the basis of above-described embodiment 3; also comprise overcurrent protection module; described overcurrent protection module comprises an input and output; the input of described overcurrent protection module is connected with the output of described Limited Current module, and the output of described overcurrent protection module is for being connected with one end of load.
A kind of battery anti-explosion circuit that the utility model provides, arranges overcurrent protection module, in the time there is large electric current in circuit, cuts off in time load, has ensured the safety of circuit.
Embodiment 5
As a kind of battery anti-explosion circuit of an embodiment of the utility model, on the basis of above-described embodiment 4, also comprise filter capacitor C8, one end of described filter capacitor C8 is connected with the positive pole of described battery, and the other end of described filter capacitor C8 is connected with the negative pole of described battery.
A kind of battery anti-explosion circuit that the utility model provides, arranges filter capacitor C8, makes the electric current of battery output more steady, is beneficial to the stable of load.
Embodiment 6
As shown in Figure 4, as a kind of battery anti-explosion circuit of an embodiment of the utility model, on the basis of above-described embodiment 3, described overvoltage protective module comprises: capacitor C 9, and capacitor C 10, overvoltage protection diode D3, wherein,
One end of described capacitor C 9, one end of described capacitor C 10 and the negative electrode of described overvoltage protection diode D3 are all connected, and their tie point is as input and the output of described overvoltage protective module;
The other end of described capacitor C 9, the other end of described capacitor C 10 and the anode of described overvoltage protection diode D3 be all connected and their tie point as the earth terminal of described overvoltage protective module.
A kind of battery anti-explosion circuit that the utility model provides, the circuit of overvoltage protective module is simple, and two electric capacity and an overvoltage protection diode, saved cost.
Embodiment 7
As shown in Figure 5; as a kind of battery anti-explosion circuit of an embodiment of the utility model; on the basis of above-described embodiment 6; in described overvoltage protective module, also comprise overvoltage protection diode D4; the negative electrode of described overvoltage protection diode D4 is connected with the negative electrode of described overvoltage protection diode D3, and the anode of described overvoltage protection diode D4 is connected with the anode of described overvoltage protection diode D3.
A kind of battery anti-explosion circuit that the utility model provides, in overvoltage protective module, arranges two overvoltage protection diodes, improves the reliability of overvoltage protective module.
Embodiment 8
As a kind of battery anti-explosion circuit of an embodiment of the utility model; on the basis of above-described embodiment 4; described overcurrent protection module is resettable fuse F1; one end of described resettable fuse F1 is as the input of described overcurrent protection module, and the other end of described resettable fuse F1 is as the output of described overcurrent protection module.
A kind of battery anti-explosion circuit that the utility model provides; in overcurrent protection module; utilize resettable fuse F1 to realize the object of overcurrent protection; in the time there is large electric current in circuit; cut off in time load, ensured the safety of circuit, in the time that electric current in circuit recovers normal; restore electricity, easy to use.
Embodiment 9
As a kind of battery anti-explosion circuit of an embodiment of the utility model, on the basis of above-described embodiment 1, described electronic power switch Q1 is P-channel enhancement type metal-oxide-semiconductor, and described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.
A kind of battery anti-explosion circuit that the utility model provides, electronic power switch Q1 is P-channel enhancement type metal-oxide-semiconductor, described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.Because FEEDBACK CONTROL switch Q3 place does not need to use power electronic device, the price of triode, lower than power electronic device, has been saved cost.
Embodiment 10
As a kind of battery charger of an embodiment of the utility model, described battery charger comprises the battery anti-explosion circuit of the arbitrary embodiment of above-mentioned 1-9.
Embodiment 11
As a kind of battery charger of an embodiment of the utility model, on the basis of above-described embodiment 10, also comprise:
Rectifier diode D1, the anode of described rectifier diode D1 is connected with the output of external DC charging power supply, and the negative electrode of described rectifier diode D1 is connected with the input of charging chip.Avoided the reverse polarity connection due to external DC charging power supply, the situation that burns out charging chip occurs.
Embodiment 12
As a kind of battery charger of an embodiment of the utility model, on the basis of above-described embodiment 11, also comprise rectifier diode D2, the anode of described rectifier diode D2 is directly connected with the negative electrode of described rectifier diode D1, and the negative electrode of described rectifier diode D2 is connected with the input of described charging chip.
A kind of battery charger that the utility model provides, two rectifier diodes are set, make, in the time that a rectifier diode lost efficacy, still can avoid the reverse polarity connection due to external DC charging power supply, the situation that burns out charging chip occurs, the fail safe that has improved circuit.
Embodiment 13
As a kind of battery charger of an embodiment of the utility model, on the basis of above-described embodiment 12, also comprise capacitor C 1, described capacitor C 1 one end is directly connected with the negative electrode of described rectifier diode D2, the other end ground connection of described capacitor C 1.Capacitor C 1 is carried out filtering to charging current, makes charging current steady.
Embodiment 14
As a kind of battery charger of an embodiment of the utility model, on the basis of above-described embodiment 13, comprise capacitor C 2, described capacitor C 2 is connected in parallel with described capacitor C 1.
A kind of battery charger that the utility model provides, arranges two electric capacity in parallel, makes filter effect better, and in the time of one of them condenser failure, has ensured carrying out smoothly of filtering.
As a kind of specific implementation, comprise each functional circuit in above-described embodiment, shown in Figure 6.
Obviously, above-described embodiment is only for example is clearly described, and the not restriction to execution mode.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here without also giving exhaustive to all execution modes.And the apparent variation of being extended out thus or variation are still among protection range of the present utility model.

Claims (14)

1. a battery anti-explosion circuit, is characterized in that, comprising:
At least one Limited Current module, described Limited Current module comprises an input and an output, the input of described Limited Current module is connected with the positive pole of battery;
Described Limited Current module specifically comprises: current-limiting resistance R7, and protective resistance R10, controlling resistance R9, feedback resistance R15, controlling resistance R13, electronic power switch Q1 and FEEDBACK CONTROL switch Q3, wherein,
Described electronic power switch Q1 and described FEEDBACK CONTROL switch Q3 include input, output and control end, and in the time that the relative voltage between input and the control end of described electronic power switch Q1 is greater than its threshold voltage threshold value, described electronic power switch Q1 conducting; When relative voltage between input and the control end of described FEEDBACK CONTROL switch Q3 is greater than its threshold voltage threshold value, described FEEDBACK CONTROL switch Q3 conducting;
One end of described current-limiting resistance R7 be connected with one end of described protective resistance R10 and their tie point as the input of described Limited Current module;
The other end of described current-limiting resistance R7 is connected with one end of described controlling resistance R9 and their tie point is connected with the input of described electronic power switch Q1;
The other end of described protective resistance R10 is connected with the input of described FEEDBACK CONTROL switch Q3;
The other end of described controlling resistance R9 is connected with the control end of described FEEDBACK CONTROL switch Q3 and their tie point is connected with one end of described feedback resistance R15;
The other end of described feedback resistance R15 is connected with the output of described electronic power switch Q1, and their tie point is as the output of described Limited Current module;
One end of described controlling resistance R13 is connected with the output of described FEEDBACK CONTROL switch Q3, and their tie point is connected with the control end of described electronic power switch Q1;
The other end of described controlling resistance R13 is connected with the negative pole of battery.
2. a kind of battery anti-explosion circuit according to claim 1, is characterized in that, described Limited Current module is two, and two described Limited Current modules are connected in series.
3. a kind of battery anti-explosion circuit according to claim 1 and 2; it is characterized in that; also comprise overvoltage protective module; described overvoltage protective module comprises an input, an output and an earth terminal; the input of described overvoltage protective module is all connected with the output of described Limited Current module with output, and the earth terminal of described overvoltage protective module is connected with battery cathode.
4. a kind of battery anti-explosion circuit according to claim 3; it is characterized in that; also comprise overcurrent protection module; described overcurrent protection module comprises an input and output; the input of described overcurrent protection module is connected with the output of described Limited Current module, and the output of described overcurrent protection module is for being connected with one end of load.
5. a kind of battery anti-explosion circuit according to claim 4, is characterized in that, also comprises filter capacitor C8, and one end of described filter capacitor C8 is connected with the positive pole of described battery, and the other end of described filter capacitor C8 is connected with the negative pole of described battery.
6. a kind of battery anti-explosion circuit according to claim 3, is characterized in that, described overvoltage protective module comprises: capacitor C 9, and capacitor C 10, overvoltage protection diode D3, wherein,
One end of described capacitor C 9, one end of described capacitor C 10 and the negative electrode of described overvoltage protection diode D3 are all connected, and their tie point is as input and the output of described overvoltage protective module;
The other end of described capacitor C 9, the other end of described capacitor C 10 and the anode of described overvoltage protection diode D3 be all connected and their tie point as the earth terminal of described overvoltage protective module.
7. a kind of battery anti-explosion circuit according to claim 6; it is characterized in that; in described overvoltage protective module, also comprise overvoltage protection diode D4; the negative electrode of described overvoltage protection diode D4 is connected with the negative electrode of described overvoltage protection diode D3, and the anode of described overvoltage protection diode D4 is connected with the anode of described overvoltage protection diode D3.
8. a kind of battery anti-explosion circuit according to claim 4; it is characterized in that; described overcurrent protection module is resettable fuse F1; one end of described resettable fuse F1 is as the input of described overcurrent protection module, and the other end of described resettable fuse F1 is as the output of described overcurrent protection module.
9. a kind of battery anti-explosion circuit according to claim 1, is characterized in that, described electronic power switch Q1 is P-channel enhancement type metal-oxide-semiconductor, and described FEEDBACK CONTROL switch Q3 is positive-negative-positive triode.
10. a battery charger, is characterized in that, described battery charger comprises the arbitrary described battery anti-explosion circuit of claim 1-9.
11. a kind of battery chargers according to claim 10, is characterized in that, also comprise:
Rectifier diode D1, the anode of described rectifier diode D1 is connected with the output of external DC charging power supply, and the negative electrode of described rectifier diode D1 is connected with the input of charging chip.
12. a kind of battery chargers according to claim 11, it is characterized in that, also comprise rectifier diode D2, the anode of described rectifier diode D2 is directly connected with the negative electrode of described rectifier diode D1, and the negative electrode of described rectifier diode D2 is connected with the input of described charging chip.
13. a kind of battery chargers according to claim 12, also comprise capacitor C 1, and described capacitor C 1 one end is directly connected with the negative electrode of described rectifier diode D2, the other end ground connection of described capacitor C 1.
14. a kind of battery chargers according to claim 13, comprise capacitor C 2, and described capacitor C 2 is connected in parallel with described capacitor C 1.
CN201420244269.XU 2014-05-13 2014-05-13 Cell explosionproof circuit and cell charging circuit Active CN203826946U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103956721A (en) * 2014-05-13 2014-07-30 北京拓盛电子科技有限公司 Battery explosion-proof circuit and battery charging circuit
WO2015172710A1 (en) * 2014-05-13 2015-11-19 北京拓盛电子科技有限公司 Explosion-proof circuit, charging circuit and charging/discharging protection circuit of battery
CN113328418A (en) * 2021-05-28 2021-08-31 深圳市中电电力技术股份有限公司 Current-limiting type electrical fire protector without limit to load type

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103956721A (en) * 2014-05-13 2014-07-30 北京拓盛电子科技有限公司 Battery explosion-proof circuit and battery charging circuit
WO2015172710A1 (en) * 2014-05-13 2015-11-19 北京拓盛电子科技有限公司 Explosion-proof circuit, charging circuit and charging/discharging protection circuit of battery
CN103956721B (en) * 2014-05-13 2017-11-03 北京拓盛电子科技有限公司 Battery anti-explosion circuit and battery charger
CN113328418A (en) * 2021-05-28 2021-08-31 深圳市中电电力技术股份有限公司 Current-limiting type electrical fire protector without limit to load type

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Effective date of registration: 20151218

Address after: 100190 Beijing, Zhongguancun, East Road, No. 66, building 1, room 9, floor 1007

Patentee after: BEIJING TOCEL ELECTRONICS CO., LTD.

Address before: 100190, room 1001, block B, century trade building, No. 66, Zhongguancun East Road, Beijing, Haidian District

Patentee before: Beijing Tocel Electronics Co., Ltd.