CN203481802U - Battery protective circuit and system - Google Patents
Battery protective circuit and system Download PDFInfo
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- CN203481802U CN203481802U CN201320595614.XU CN201320595614U CN203481802U CN 203481802 U CN203481802 U CN 203481802U CN 201320595614 U CN201320595614 U CN 201320595614U CN 203481802 U CN203481802 U CN 203481802U
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Abstract
The utility model relates to a battery protective circuit and a system. The battery protective circuit includes a power-on detection circuit, a power supply management circuit, a first switch, and a low-voltage detection circuit, the low-voltage detection circuit is connected with a battery to detect whether the voltage of the battery is lower than a low-voltage detection threshold value, when the low-voltage detection circuit detects that the voltage of the battery is lower than the low-voltage detection threshold value, the first switch is turned off to cut off the electric leakage path of the battery, the power-on detection circuit outputs power on and off signals when the first switch or any of the power-on buttons is in an off state, and the power supply management circuit is connected with the power-on detection circuit and cuts off the discharging path of the battery to forbidden the discharging of the battery when the power off signal is received. The battery protective circuit provided can realize the cutoff of the discharging path of the battery and the battery protection function without the need of battery protection chips.
Description
Technical field
The utility model relates to battery protection technical field, relates in particular to a kind of battery protecting circuit and system.
Background technology
In recent years, the portable electric appts such as digital camera, mobile phone, panel computer, portable audio-visual devices or bluetooth equipment adopts lithium battery as main power source more and more.Lithium battery has that volume is little, energy density is high, memory-less effect, high, the high cell voltage of cycle life and the advantage such as self-discharge rate is low.Due to self-characteristic, easily blast or damage, the fail safe in the time of must considering charging, electric discharge.
Existing mode be normally battery specialized designs protection chip and baffle.Battery has assembled after the baffle of band protection chip, is the whole system power supply of electronic equipment.Fig. 1 is the circuit diagram of the battery protecting circuit of existing electronic equipment, as shown in Figure 1, comprises battery core BT1, battery protection chip VM, power switch MN1, power switch MN2, resistance R 1, resistance R 2, capacitor C 1 and protection control circuit P1.Wherein, this protection control circuit P1 comprises charging circuit Charger, Circuit management circuit Power, start testing circuit T1, resistance R 3, resistance R 4.When the voltage of battery core BT1 is higher than charging overvoltage protection threshold value, output CO is low level (low level is VM voltage), and switch-off power switch MN2 realizes the cut-out to charging path like this, forbids charging.When battery core voltage is lower than electric discharge overvoltage protection threshold value; battery protection chip output DO becomes low level (low level is G terminal voltage); switch-off power switch MN1; realize like this cut-out to discharge path; forbid electric discharge; forbid, after electric discharge, even if system, control circuit exists discharge path, also cannot consuming battery core energy.
As can be seen here, existing battery protecting circuit all needs to adopt battery protection chip, and during due to battery discharge; discharging current need to flow through power switch MN1 and MN2; need to consume certain electric weight, thereby cause the power consumption of electronic equipment to increase, power supplying efficiency is not high.
Utility model content
The utility model provides a kind of battery protecting circuit and system, without adopting battery protection chip, can realize the cut-out of battery discharge path, realizes battery protection function, save cost, and power supplying efficiency is higher, extends the stand-by time of electronic equipment.
The utility model provides a kind of battery protecting circuit, and described battery protecting circuit comprises: start testing circuit, electric power management circuit, the first switch and low-voltage testing circuit;
Described the first switch is connected between starting key and described start testing circuit, and the control end of described the first switch is connected with described low-voltage testing circuit;
Described low-voltage testing circuit, is connected with battery, for detection of the voltage of described battery, whether lower than low pressure detection threshold, when the voltage that described battery detected is during lower than described low pressure detection threshold, disconnects described the first switch, cuts off the electric leakage path of described battery;
Described start testing circuit, for when described the first switch or described starting key any one during in off-state, out-put supply cut-off signals;
Described electric power management circuit, is connected with described start testing circuit, for when receiving described power remove signal, cuts off the path of described battery discharge, forbids described battery discharge.
The utility model also provides a kind of battery protection system, and described system comprises: the battery protecting circuit described in lithium battery and the utility model embodiment.
The battery protecting circuit that the utility model provides and system; without adopting battery protection chip; can realize the cut-out of battery discharge path; realize battery protection function; escapable cost; during due to electric discharge, without a plurality of power switchs of flowing through, improve the power supplying efficiency of battery, extended the stand-by time of electronic equipment.
Accompanying drawing explanation
Fig. 1 is the circuit diagram of existing battery protecting circuit;
The circuit diagram of the battery protecting circuit that Fig. 2 provides for the utility model embodiment mono-;
The circuit theory diagrams of a kind of low-voltage testing circuit that Fig. 3 provides for the utility model embodiment mono-;
The circuit theory diagrams of the another kind of low-voltage testing circuit that Fig. 4 provides for the utility model embodiment mono-;
A kind of substrate that Fig. 5 provides for the utility model embodiment mono-is selected the circuit theory diagrams of circuit;
The circuit diagram of the battery protecting circuit that Fig. 6 provides for the utility model embodiment bis-.
Embodiment
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Battery protecting circuit of the present utility model and system go for using in the electronic equipment of lithium battery, such as can be used in the portable electric appts such as bluetooth earphone, smart mobile phone or panel computer.
Embodiment mono-
Fig. 2 is the circuit diagram of the battery protecting circuit that provides of the present embodiment, and as shown in Figure 2, this battery protecting circuit comprises: start testing circuit T1, electric power management circuit Power, the first K switch 1 and low-voltage testing circuit LT1.
The first K switch 1 is connected between starting key Buttom and start testing circuit T1, and the control end of the first K switch 1 is connected with low-voltage testing circuit LT1.The other end of starting key Buttom is connected with battery BT1.
Low-voltage testing circuit LT1 is connected with battery BT1, for detection of the voltage of battery BT1, whether lower than low pressure detection threshold, when the voltage that described battery detected is during lower than described low pressure detection threshold, disconnects described the first switch, cuts off the electric leakage path of battery.
Start testing circuit T1 for when the first K switch 1 or starting key Buttom any one during in off-state, out-put supply cut-off signals.Input one end of start testing circuit T1 is connected with battery BT1, and the other end is connected with starting key Buttom by the first K switch 1, and output is connected with electric power management circuit Power.When the first K switch 1 and starting key Buttom are during all in on-state, start testing circuit T1 out-put supply connection signal, electric power management circuit Power is in "on" position.
Electric power management circuit Power is connected with start testing circuit T1, for when receiving the described power remove signal of start testing circuit T1 output, cuts off the path of described battery discharge, forbids described battery discharge.Electric power management circuit Power can comprise or combination in any in DC-to-DC converter, voltage regulator, power switch, charge pump, to can occur when abnormal, forbid battery discharge, thereby realize complete battery protection function at battery.
Described low pressure detection threshold is more than or equal to the overvoltage discharge prevention threshold value of described battery, and requires (for example value between 2.0V～2.9V) lower than minimum operating voltage, when avoiding battery core brownout, because over-discharge can causes battery loss.This low-voltage testing circuit LT1 keeps work always.
When the voltage of battery BT1 is during lower than low pressure detection threshold, the BATH signal of low-voltage testing circuit LT1 output becomes low level, controls the first K switch 1 and disconnects, and cuts off by the electric leakage path of resistance R 5.Simultaneously by cutting off the first K switch 1, resistance R 5 can drag down the input KON of start testing circuit T1, make KON lower than start detection threshold, thereby the ON signal of start testing circuit T1 output is also low level, control electric power management circuit Power for turn-offing completely, avoid the over-discharge can to the battery core of battery BT1.Like this, when the battery core voltage of battery BT1 is during lower than low pressure detection threshold, even if starting key Buttom for example, is pressed by false triggering (while transporting), also there will not be chip to be produced the problem to the excessive power consumption of battery core of battery BT1 by false triggering work.Meanwhile, false triggering causes the electric leakage path that battery BT1 discharges by resistance R 5 to be also cut off.Like this, in the time of just can realizing battery core brownout, reduce the effect of electric leakage.
Fig. 3 is the circuit theory diagrams of a kind of low-voltage testing circuit of providing of the present embodiment, as shown in Figure 3, this low-voltage testing circuit comprises: the first divider resistance R301, the second divider resistance R302, current source I301, switching tube Q301, trigger schmitt and inverter INV301.The voltage VB of the voltage VBAT of battery after the first divider resistance R301 and the second divider resistance R302 dividing potential drop is loaded into the control end (base stage) of switching tube Q301, the input of current source I301 is connected with the anodal VBAT of battery BT1, the output of described current source I301 is connected with the collector electrode of switching tube Q301, and the collector electrode of switching tube Q301 is output detections result after trigger schmitt, inverter INV301.Described low pressure detection threshold is determined by the resistance ratio of described the first divider resistance R301 and the second divider resistance R302.
The voltage VBAT of battery produces VB voltage through the first divider resistance R301 and the second divider resistance R302 dividing potential drop.When the enough height of VB voltage make switching tube Q301 electric current be greater than current source I301 electric current, the collector electrode CO of switching tube Q301 becomes low level, and the signal BATH of process Schmidt trigger schmitt and inverter INV301 becomes high level.Otherwise when VB voltage is lower, during lower than this circuit turnover voltage, BATH is output as low level.Current source I301 is positive temperature coefficient current source, and its implementation can be the circuit based on Δ Vbe, i.e. I301=K1 Δ Vbe/R.The electric current of the current source I301 resistance R 303 of flowing through, in resistance R 303, also produce positive temperature coefficient voltage, and switching tube Q301(can be NPN transistor) Vbe be negative temperature coefficient, resistance value through the suitable resistance R 303 of design can realize good effect temperature compensation, the magnitude of voltage that the overturn point that makes VB node voltage is zero-temperature coefficient, turn threshold is comparatively accurate like this.VB node turn threshold equals Vbe+R303I301, and wherein Vbe is the base-emitter voltage of switching tube Q301, and R303 is the resistance value of resistance R 303, and I301 is the current value of current source I301.The turn threshold of VBAT equal (Vbe+R303I301) (R301+R5)/R301, wherein R301 is the resistance value of resistance R 301, R303 is the resistance value of resistance R 303.
Fig. 4 is the circuit theory diagrams of the another kind of low-voltage testing circuit that provides of the present embodiment, as shown in Figure 4, this low-voltage testing circuit comprises: the first divider resistance R401, the second divider resistance R404, switching tube MP401～MP403, switching tube MN402, switching tube MN403, resistance R 402, resistance R 403, current source I401 and trigger schmitt.This low-voltage testing circuit adopts the mode of a plurality of switching tube combinations to realize.
The voltage-drop loading of the voltage VBAT of battery after the first divider resistance R401 and the second divider resistance R404 dividing potential drop is to the control end of switching tube MN402 and switching tube MN403.The substrate terminal of switching tube MP401, switching tube MP402 and switching tube MP403, drain electrode are connected with the voltage VBAT of battery, the grid of switching tube MP401 and switching tube MP402 is connected to form the current mirror of coupling, switching tube MN402 and switching tube MN403 form common source amplifying circuit, the grid of switching tube MP403 is by current source I401 ground connection, the source electrode of switching tube MN403 is connected with the grid of switching tube MP403, and the drain electrode of switching tube MP403 is Output rusults after trigger schmitt.
The first divider resistance R401 and the second divider resistance R404 form bleeder circuit, and VBAT voltage is carried out to dividing potential drop.When VB voltage is during higher than turn threshold, VC voltage becomes high level, through the output signal BATH of Schmidt trigger schmitt, also becomes high level.When VB voltage is during lower than turn threshold, VC voltage becomes low level, through the output signal of Schmidt trigger schmitt, is also low level.Design switching tube MP401 and switching tube MP402 are the current mirror of coupling, switching tube MP403 and current source I401 formation common source amplifying circuit.The ratio of the breadth length ratio of switching tube MN402 and switching tube MN403 is certain proportion (being made as N), for example 8:1.The breadth length ratio of switching tube MN402 is larger.The proper proportion that can design resistance R 403 and resistance R 402 realizes the VB turn threshold voltage of zero-temperature coefficient.In order to obtain turn threshold comparatively accurately, generally by switching tube MN402 and switching tube MN403 design work in sub-threshold region.The turn threshold of VB node is Vth+ (2R403/R402). ζ .VT.ln (N), wherein Vth is the threshold voltage of switching tube MN403, for negative temperature coefficient, ζ is the subthreshold current factor, VT is thermal voltage, equals kT/q, is directly proportional as seen to temperature, N is the ratio of the breadth length ratio of switching tube MN402 and switching tube MN403, and ln is logarithmic function.
Continuation is referring to Fig. 2, and battery protecting circuit also comprises: charge management circuit Charger and charge switch pipe MP1.One end of charge switch pipe MP1 is connected with battery BT1, and the other end connects charge power supply S1, and control end is connected with charge management circuit Charger.Wherein, charge power supply S1 can be data wire USB power supply or adapter Adapter power supply.
Charge management circuit Charger is connected respectively with charge power supply S1 with battery BT1, one end of the input of charge management circuit Charger is connected with the anodal VBAT of battery BT1, the other end of input is connected with the anodal VCHG of charge power supply S1, and output is connected with the control end of charge switch pipe MP1.Charge management circuit Charger is for the voltage VCHG when charge power supply S1 and charge power supply S1 being detected during higher than the voltage VBAT of battery BT1, and control charge switch pipe MP1 conducting is charged to battery BT1.Charge switch pipe MP1 is insulating gate type field effect tube.
Optionally, battery protecting circuit also comprises: substrate is selected circuit CC1.Substrate selection circuit CC1 is connected in the substrate of charge switch pipe MP1, and according to the underlayer voltage of the operating state automatic switchover charge switch pipe MP1 of charge switch pipe MP1.In general, MOS transistor generally has four ends: source electrode, drain electrode, grid, substrate.In order to allow the normal operation of PMOS transistor, its substrate terminal should connect high potential (, when drain voltage is greater than source voltage, substrate should connect drain voltage, and when source voltage is greater than drain voltage, substrate should connect source voltage) in drain electrode and source electrode.
Particularly, Fig. 5 is the circuit theory diagrams that a kind of substrate that the present embodiment provides is selected circuit, as shown in Figure 5, comprising: comparator C OMP501, inverter INV501, K switch 501 and K switch 502.One end of the input of comparator C OMP501 connects the anodal VBAT of battery BT1, the other end is connected with charge power supply VCHG, output is connected with control end, the inverter INV501 of K switch 501, the output of inverter INV501 is connected with the control end of K switch 502, K switch 501 is connected in anodal VBAT and the substrate of battery BT1 and selects between the output VMAX of circuit, and K switch 502 is connected in charge power supply VCHG and substrate is selected between the output VMAX of circuit.Substrate selects circuit CC1 to select Voltage-output higher in VBAT and VCHG to VMAX end, the i.e. substrate terminal of charge switch pipe MP1.
Like this, the utility model embodiment is realized battery BT1 is charged by charge management circuit Charger.When USB or adapter (Adapter) insertion being detected, battery is charged.Charge management circuit Charger generally can comprise precharge control, constant current charge control and constant voltage charge control circuit.Charging control process generally comprises precharge, constant current charge and constant voltage charge.When cell voltage is for example, during lower than precharge threshold value (3V), charging circuit (Charger) charges to battery with less pre-charge current, be generally setting constant current charge electric current 1/10th.For example, when cell voltage rises to precharge threshold value (3V) when above, the constant current charge electric current that charging circuit output is set charges to battery.For example, when battery charges to constant voltage charge threshold value (4.2V), battery is carried out to constant voltage charge, and charging current reduces gradually, until battery is full of.In the utility model, the constant voltage charge threshold value of charging circuit will be set lower than battery charging overvoltage protection threshold value.Detailed control method for precharge, constant current charge and constant voltage charge is known by those skilled in the art, in this, repeats no more.
Like this, the utility model, by low-voltage testing circuit, can be realized the cut-out of battery discharge path without adopting battery protection chip, realizes battery protection function, thereby saves cost.And, during due to electric discharge, without a plurality of power switchs of flowing through, improved the power supplying efficiency of battery, extend the stand-by time of electronic equipment.
Embodiment bis-
Fig. 6 is the circuit diagram of the battery protecting circuit that provides of the present embodiment, as shown in Figure 6, similar in the battery protecting circuit of the present embodiment and embodiment mono-, difference part is, this battery protecting circuit also comprises: high-voltage detecting circuit HT1 and high-voltage control circuit.
High-voltage detecting circuit HT1 is connected with battery BT1, for detection of the voltage VBAT of battery BT1 whether higher than high pressure detection threshold, when the voltage VBAT that battery BT1 detected is during higher than described high pressure detection threshold, output charging cut-off signals, and by described high-voltage control circuit, described charge switch pipe is disconnected, stop described battery to charge.
High-voltage control circuit comprises inverter INV, second switch K2 and the 3rd K switch 3.Inverter INV is connected with the output of high-voltage detecting circuit HT1.Second switch K2 is connected between the output of charge management circuit Charger and the control end of charge switch pipe MP1, and the control end of second switch K2 is connected with the output of inverter INV.The 3rd K switch 3 is connected between the control end of charge switch pipe MP1 and the substrate of charge switch pipe MP1, and the control end of the 3rd K switch 3 is connected with the output of high-voltage detecting circuit HT1.
When described high-voltage detecting circuit HT1 exports described charging cut-off signals, second switch K2 disconnects, the 3rd K switch 3 conductings.
Due to concerning battery core, charging overvoltage is breakneck, can cause battery core blast when serious.In order further to strengthen battery core fail safe, additionally increase high pressure and detect, another safety guarantee is provided.Even due to some abnormal cause, cause charging circuit to damage, high-voltage detecting circuit still can independently work.
For example, when the battery core overvoltage of battery BT1 being detected (4.275V), high-voltage detecting circuit HT1 output signal OV will become high level, OVB signal becomes low level, controlling second switch K2 disconnects, the 3rd K switch 3 conductings, the 3rd K switch 3 conductings are drawn high the grid voltage of charge switch pipe MP1 to substrate and are selected circuit CC1 output VMAX, and substrate selects circuit CC1 can select Voltage-output that in VBAT and VCHG, voltage is higher to VMAX.The 3rd K switch 3 conductings draw high the grid voltage of charge switch pipe MP1 to VMAX, can effectively charge switch pipe MP1 be turn-offed completely, can cut off charging path, prevent that the battery core of battery BT1 from being overcharged, and improve the fail safe of battery core.
Wherein, high-voltage detecting circuit HT1 can adopt circuit as shown in Figure 3 and Figure 4 to realize, and by changing the resistance value ratio of different divider resistances, can realize high-voltage detecting circuit, in this, repeats no more.
As can be seen here, the utility model, without devices such as battery protection chip, power switch MN1, power switch MN2, also can be realized the defencive function of battery protecting circuit.And due to when electric discharge, discharging current is without power switch MN1, the MN2 of flowing through, during power supply of the present utility model, efficiency is higher, contributes to extend the stand-by time of electronic equipment.
In addition, the utility model can also provide a kind of battery protection system, and this system comprises the battery protecting circuit described in lithium battery and above-described embodiment one and embodiment bis-.
The battery protecting circuit that the utility model provides and system; by low-voltage testing circuit and high-voltage detecting circuit; can realize the cut-out of battery discharge path and charging circuit; realize battery protection function; without adopting battery protection chip, escapable cost, during due to electric discharge without a plurality of power switchs of flowing through; improve the power supplying efficiency of battery, extended the stand-by time of electronic equipment.
Above-described embodiment; the purpose of this utility model, technical scheme and beneficial effect are further described; institute is understood that; the foregoing is only embodiment of the present utility model; and be not used in and limit protection range of the present utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection range of the present utility model.
Claims (10)
1. a battery protecting circuit, is characterized in that, described battery protecting circuit comprises: start testing circuit, electric power management circuit, the first switch and low-voltage testing circuit;
Described the first switch is connected between starting key and described start testing circuit, and the control end of described the first switch is connected with described low-voltage testing circuit;
Described low-voltage testing circuit, is connected with battery, for detection of the voltage of described battery, whether lower than low pressure detection threshold, when the voltage that described battery detected is during lower than described low pressure detection threshold, disconnects described the first switch, cuts off the electric leakage path of described battery;
Described start testing circuit, for when described the first switch or described starting key any one during in off-state, out-put supply cut-off signals;
Described electric power management circuit, is connected with described start testing circuit, for when receiving described power remove signal, cuts off the path of described battery discharge, forbids described battery discharge.
2. battery protecting circuit according to claim 1, is characterized in that, described low-voltage testing circuit comprises: the first divider resistance, the second divider resistance, current source, switching tube, trigger and inverter;
The voltage-drop loading of the voltage of described battery after described the first divider resistance and the second divider resistance dividing potential drop is to the control end of described switching tube, the input of described current source is connected with described battery, the output of described current source is connected with the collector electrode of described switching tube, the collector electrode of described switching tube is output detections result after described trigger, described inverter, and described low pressure detection threshold is determined by the resistance ratio of described the first divider resistance and the second divider resistance.
3. battery protecting circuit according to claim 1, it is characterized in that, described low-voltage testing circuit comprises: the first divider resistance, the second divider resistance, current source (I401), the first switching tube (MP401), second switch pipe (MP402), the 3rd switching tube (MP403), the 4th switching tube (MN402), the 5th switching tube (MN403), the first resistance (R402), the second resistance (R403) and trigger;
The voltage-drop loading of the voltage of described battery after described the first divider resistance and the second divider resistance dividing potential drop is to the control end of described the 4th switching tube (MN402) and the 5th switching tube (MN403), the grid of described the first switching tube (MP401) and second switch pipe (MP402) is connected to form the current mirror of coupling, described the 4th switching tube (MN402) and the 5th switching tube (MN403) form common source amplifying circuit, the grid of described the 3rd switching tube (MP403) is by described current source (I401) ground connection, the source electrode of described the 5th switching tube (MN403) is connected with the grid of described the 3rd switching tube (MP403), the drain electrode of described the 3rd switching tube (MP403) Output rusults after described trigger.
4. according to the battery protecting circuit described in the arbitrary claim of claim 1～3, it is characterized in that, described battery protecting circuit also comprises: charge management circuit, charge switch pipe;
One end of described charge switch pipe is connected with described battery, and the other end connects described charge power supply, and control end is connected with described charge management circuit;
Described charge management circuit, is connected respectively with described charge power supply with described battery, for the voltage when described charge power supply and described charge power supply being detected, during higher than the voltage of described battery, controls the conducting of described charge switch pipe described battery is charged.
5. battery protecting circuit according to claim 4, is characterized in that, described charge switch pipe is insulating gate type field effect tube.
6. battery protecting circuit according to claim 4; it is characterized in that; described battery protecting circuit also comprises: substrate is selected circuit; described substrate selects circuit to be connected in the substrate of described charge switch pipe, and according to the automatically switch underlayer voltage of described charge switch pipe of the operating state of described charge switch pipe.
7. battery protecting circuit according to claim 4; it is characterized in that; described battery protecting circuit also comprises: high-voltage detecting circuit and high-voltage control circuit; described high-voltage detecting circuit is connected with described battery; for detection of the voltage of described battery whether higher than high pressure detection threshold; when the voltage that described battery detected is during higher than described high pressure detection threshold; output charging cut-off signals; and by described high-voltage control circuit, described charge switch pipe is disconnected, stop described battery to charge.
8. battery protecting circuit according to claim 7, it is characterized in that, described high-voltage control circuit comprises inverter, second switch and the 3rd switch, described inverter is connected with the output of described high-voltage detecting circuit, described second switch is connected between the output of described charge management circuit and the control end of described charge switch pipe, the control end of described second switch is connected with the output of described inverter, described the 3rd switch is connected between the control end of described charge switch pipe and the substrate of described charge switch pipe, described the 3rd control end of switch and the output of described high-voltage detecting circuit are connected.
9. battery protecting circuit according to claim 1, is characterized in that, described electric power management circuit comprises or combination in any in DC-to-DC converter, voltage regulator, power switch, charge pump.
10. a battery protection system, is characterized in that, described system comprises the battery protecting circuit as described in lithium battery and claim as arbitrary in claim 1～9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595614.XU CN203481802U (en) | 2013-09-25 | 2013-09-25 | Battery protective circuit and system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320595614.XU CN203481802U (en) | 2013-09-25 | 2013-09-25 | Battery protective circuit and system |
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| CN203481802U true CN203481802U (en) | 2014-03-12 |
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| CN201320595614.XU Withdrawn - After Issue CN203481802U (en) | 2013-09-25 | 2013-09-25 | Battery protective circuit and system |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490389A (en) * | 2013-09-25 | 2014-01-01 | 无锡中星微电子有限公司 | Battery protecting circuit and system |
| CN106803755A (en) * | 2016-12-23 | 2017-06-06 | 长沙景美集成电路设计有限公司 | A kind of novel high-stability disconnecting switch circuit for application of sub-atmospheric pressure |
| CN108923489A (en) * | 2018-07-25 | 2018-11-30 | 南京中感微电子有限公司 | Battery protecting circuit |
| CN112039152A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Bluetooth earphone |
| CN113285508A (en) * | 2021-05-26 | 2021-08-20 | 东莞新能安科技有限公司 | Battery protection circuit, battery management system and consumer |
| CN114050554A (en) * | 2022-01-11 | 2022-02-15 | 深圳市创芯微微电子有限公司 | Battery protection circuit and power tube control method thereof |
| CN114256939A (en) * | 2022-02-25 | 2022-03-29 | 荣耀终端有限公司 | Over-discharge protection circuit, battery protection board and electronic equipment |
| CN114336531A (en) * | 2022-03-09 | 2022-04-12 | 荣耀终端有限公司 | Leakage protection circuit and electronic device |
| CN114421433A (en) * | 2022-02-24 | 2022-04-29 | 合肥中感微电子有限公司 | Battery protection circuit and charging power switch control signal generation circuit thereof |
| CN117791846A (en) * | 2024-02-26 | 2024-03-29 | 西安第六镜网络科技有限公司 | Dual-power conversion device |
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- 2013-09-25 CN CN201320595614.XU patent/CN203481802U/en not_active Withdrawn - After Issue
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103490389B (en) * | 2013-09-25 | 2016-06-15 | 无锡中感微电子股份有限公司 | Battery protecting circuit and system |
| CN103490389A (en) * | 2013-09-25 | 2014-01-01 | 无锡中星微电子有限公司 | Battery protecting circuit and system |
| CN106803755A (en) * | 2016-12-23 | 2017-06-06 | 长沙景美集成电路设计有限公司 | A kind of novel high-stability disconnecting switch circuit for application of sub-atmospheric pressure |
| CN108923489A (en) * | 2018-07-25 | 2018-11-30 | 南京中感微电子有限公司 | Battery protecting circuit |
| CN108923489B (en) * | 2018-07-25 | 2020-10-27 | 南京中感微电子有限公司 | Battery protection circuit |
| CN112039152B (en) * | 2020-08-27 | 2022-10-21 | 西安稳先半导体科技有限责任公司 | Bluetooth earphone |
| CN112039152A (en) * | 2020-08-27 | 2020-12-04 | 西安稳先半导体科技有限责任公司 | Bluetooth earphone |
| CN113285508A (en) * | 2021-05-26 | 2021-08-20 | 东莞新能安科技有限公司 | Battery protection circuit, battery management system and consumer |
| CN114050554A (en) * | 2022-01-11 | 2022-02-15 | 深圳市创芯微微电子有限公司 | Battery protection circuit and power tube control method thereof |
| CN114421433A (en) * | 2022-02-24 | 2022-04-29 | 合肥中感微电子有限公司 | Battery protection circuit and charging power switch control signal generation circuit thereof |
| CN114421433B (en) * | 2022-02-24 | 2023-09-12 | 合肥中感微电子有限公司 | Battery protection circuit and charging power switch control signal generating circuit thereof |
| CN114256939A (en) * | 2022-02-25 | 2022-03-29 | 荣耀终端有限公司 | Over-discharge protection circuit, battery protection board and electronic equipment |
| CN114256939B (en) * | 2022-02-25 | 2022-08-12 | 荣耀终端有限公司 | Over-discharge protection circuit, battery protection board and electronic equipment |
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