CN201004559Y - A charging and discharging circuit for backup battery of vehicular electronic device - Google Patents
A charging and discharging circuit for backup battery of vehicular electronic device Download PDFInfo
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- CN201004559Y CN201004559Y CNU2006201454549U CN200620145454U CN201004559Y CN 201004559 Y CN201004559 Y CN 201004559Y CN U2006201454549 U CNU2006201454549 U CN U2006201454549U CN 200620145454 U CN200620145454 U CN 200620145454U CN 201004559 Y CN201004559 Y CN 201004559Y
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- 101150090280 MOS1 gene Proteins 0.000 claims description 16
- 101100401568 Saccharomyces cerevisiae (strain ATCC 204508 / S288c) MIC10 gene Proteins 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 12
- 230000005669 field effect Effects 0.000 claims description 11
- 239000003990 capacitor Substances 0.000 claims description 10
- 238000001514 detection method Methods 0.000 claims description 9
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 8
- 229910052710 silicon Inorganic materials 0.000 claims description 8
- 239000010703 silicon Substances 0.000 claims description 8
- 230000000052 comparative effect Effects 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract 1
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- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
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Abstract
The utility model relates to a charge and discharge circuit used for a spare battery of a vehicle electronic device and comprises a charge circuit which connects with a main wire circuit, a discharge circuit which connects with the spare battery as well as an over-charge and over discharge protecting circuit. The over-charge and over discharge protecting circuit comprises a sampling circuit which is used for detecting the current voltage of the spare battery and a comparing circuit which is used for comparing the current voltage with the voltage reference and outputting the charge and discharge singles according to the comparing result; the comparing circuit connects with a charge switch module and a discharge switch module in the charge circuit; and the charge circuit also comprises an ACC single inlet interface which connects with the charge switch module. The discharge circuit comprises a main battery working state detecting module which is connected with the discharge switch module and is used for detecting main battery working state and outputs the control singles according to the main battery working state. The utility model can protect the spare battery favorably and the circuit is simple and practical.
Description
Technical field
The utility model relates to the power supply of vehicle electronic device, more particularly, relates to the reserve battery charge-discharge circuit of the vehicle electronic device of a kind of charging that can realize reserve battery, discharge and super-charge super-discharge protection.
Background technology
At present, some important vehicle electronic devices (as the vehicle GPS security terminal etc.) are except by the power supply of the power supply on the automobile, also need in equipment, increase standby rechargeable battery, so that after the main power source that provides on the automobile is destroyed, still can work on a period of time.Rechargeable battery generally all has operating voltage range, can not overcharge and discharge.If reserve battery directly is connected in parallel with main power source, when the main power source operate as normal, can charge to reserve battery for a long time, be easy to cause overcharging of reserve battery; When main power source is destroyed, reserve battery meeting over-discharge can, power supply reduces 0V.Can have a strong impact on the life-span of reserve battery like this, and other components and parts of vehicle electronic device are also had infringement.
The utility model content
The technical problems to be solved in the utility model is; defective at the above-mentioned battery electric quantity super-charge super-discharge of prior art; a kind of reserve battery charge-discharge circuit that has the vehicle electronic device of super-charge super-discharge protective circuit is provided; behind automobile starting, can pass through storage battery (master) for the reserve battery charging, when the automobile main power source is destroyed, can utilize reserve battery to power for vehicle electronic device.
The technical scheme that its technical problem that solves the utility model adopts is: the reserve battery charge-discharge circuit of constructing a kind of vehicle electronic device, comprise the charging circuit that links to each other with the electric main road, the discharge circuit that links to each other with reserve battery and super-charge super-discharge protective circuit, described super-charge super-discharge protective circuit comprises the sample circuit that is used to detect the current voltage of reserve battery and with described current voltage and reference voltage compares and according to the comparison circuit of comparative result output charge and discharge control signal; Charge switch module in described comparison circuit and the charging circuit and the discharge switch module in the discharge circuit are connected; Described charging circuit also comprises the ACC signal input interface that links to each other with the charge switch module.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, described discharge circuit comprises the main electricity work state detection module that links to each other with the discharge switch module, be used to detect main electric work state and export discharge control signal according to the electric work state of described master.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, described charge switch module comprises PNP triode Q1, NPN triode Q2; Wherein, the base stage of NPN triode Q2 links to each other with the charging control signal output of described comparator and described ACC signal input interface, emitter grounding, and collector electrode links to each other with the base stage of PNP triode Q1 by a resistance R 4; The collector electrode of PNP triode Q1 links to each other with reserve battery, and emitter-base bandgap grading links to each other with the electric main road by resistance R 2 and diode D1, wherein the anodal termination electric main road of diode D1.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, described discharge switch module comprises NPN triode Q3 and field effect transistor MOS1; Wherein, the base stage of described NPN triode Q3 links to each other with the discharge control signal output of the discharge control signal output of described comparator and described main electricity work state detection module, emitter grounding, collector electrode links to each other with the grid of field effect transistor MOS1 by resistance R 8; The source electrode of field effect transistor MOS1 links to each other with reserve battery, and drain electrode links to each other the wherein drain electrode of the anodal termination field effect transistor MOS1 of diode D2 by diode D2 with vehicle electronic device.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, described main electricity work state detection module comprises diode D3, resistance R 10 and NPN triode Q4; Wherein, the positive pole of diode D3 connects the electric main road, and negative pole links to each other with the base stage of NPN triode Q4 by resistance R 10; The grounded emitter of triode Q4 is connected with resistance R 11 and capacitor C 1 between base stage and the emitter, current collection is the discharge control signal output very.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, in the described super-charge super-discharge protective circuit, sample circuit comprises resistance R 12,13 and resistance R 15, R16; Described comparison circuit comprises that two-way voltage comparator U1 and reference voltage provide circuit; Wherein resistance R 12, R13 are serially connected between the positive pole and ground of reserve battery, the road normal phase input end of R12 and the termination comparator U1 that links to each other of R13, resistance R 15, R16 are serially connected between the positive pole and ground of reserve battery, another road normal phase input end of R15 and the termination comparator U1 that links to each other of R16, reference voltage connects the inverting input of comparator; The first via output OUT1 of comparator U1 is the discharge control signal output, and the second tunnel output OUT2 of comparator U1 is the charging control signal output.
In the reserve battery charge-discharge circuit of vehicle electronic device described in the utility model, described reference voltage provides circuit to comprise controllable silicon U2, resistance R 14, capacitor C 2, wherein, the plus earth of controllable silicon U2, negative pole links to each other with power supply POW_C by resistance R 14, the control utmost point is connected with negative pole, and capacitor C 2 is connected between positive pole and the negative pole.
Implement the reserve battery charge-discharge circuit of vehicle electronic device of the present utility model; has following beneficial effect: can provide good protection to the use of reserve battery; behind automobile starting, can pass through storage battery (master) for the reserve battery charging, when the automobile main power source is destroyed, can utilize reserve battery to power for vehicle electronic device.And circuit is simple, practical.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structure principle chart (frame of broken lines in) of the reserve battery charge-discharge circuit of the utility model vehicle electronic device, and with reserve battery and vehicle electronic device annexation schematic diagram;
Fig. 2 is the circuit theory diagrams of the reserve battery charge-discharge circuit embodiment of the utility model vehicle electronic device.
Embodiment
The utility model is applicable to the charge-discharge circuit of the vehicle electronic device reserve battery of 12V (or 24V) power supply power supply.Shown in Fig. 1 frame of broken lines, it comprises charging circuit, discharge circuit and super-charge super-discharge protective circuit three parts.Wherein, the super-charge super-discharge protective circuit comprises sample circuit and comparison circuit; sample circuit is used to detect the current voltage of reserve battery, and comparison circuit is used for current voltage and reference voltage compares and give the charge switch module of charging circuit, the discharge switch module in the discharge circuit according to comparative result output charge and discharge control signal.
Also comprise the ACC signal input interface that links to each other with the charge switch module in the charging circuit, be used to receive vehicle launch or flame-out signal, so that the charge switch module is charged to reserve battery or stop charging after vehicle is flame-out in control behind the vehicle launch.
Also comprise the main electricity work state detection module that links to each other with the discharge switch module in the discharge circuit, be used to detect the powered operation state of main electricity (storage battery) power supply and export discharge control signal according to the electric work state of described master, so that the discharge switch module when main electricity destroyed (cut-out), is controlled reserve battery and is powered to vehicle electronic device.
The charge-discharge circuit operation principle of the utility model vehicle electronic device reserve battery is as follows:
Behind the car engine, detect the ACC signal in the charging circuit, control charge switch module makes the master who draws from automobile storage battery establish the reserve battery charging of beginning to vehicle electronic device by cable.When automobile flameout, main electricity stops to charge to reserve battery.Can prevent consuming excessively under the parking of automobile state like this to the storage battery electric weight.
When the reserve battery charging reaches certain setting voltage; when both the reserve battery charging has been expired; by to the partial pressure value of backup battery voltage and the comparison of reference voltage, make the control level of the 1 tunnel control output end output of comparator in the overcharge protection circuit to stop of the charging of main electricity to reserve battery.Can prevent overcharging of reserve battery like this, prolong the life-span of reserve battery.
If main electricity is cut off, the discharge circuit of reserve battery can be by the control of main electricity work state detection module, makes the electric current of reserve battery link through a discharge switch module and give this vehicle electronic device power supply on the electric main road, guarantees that it can work on.
After the discharge work of certain hour of reserve battery process; when voltage is reduced to certain value; with it partial pressure value and reference voltage relatively, make the control level of the 2 road output output of comparator in the overcharge protection circuit to stop the discharge of reserve battery to main electricity.Can avoid the over-discharge can of reserve battery like this, prolong the life-span of reserve battery.
As shown in Figure 2, in embodiment of the present utility model, charging circuit comprises that diode D0, diode D1, PNP triode Q1, NPN triode Q2 and resistance R 2 are to R6.Wherein, the positive pole of diode D0, diode D1 connects main electrical input, and the negative pole of diode D0 connects the vehicle electronic device feeder ear, and the negative pole of diode D1 links to each other with the emitter of PNP triode Q1 by resistance R 2.The collector electrode of triode Q1 connects the positive pole of reserve battery, and base stage links to each other with the collector electrode of NPN triode Q2 by resistance R 4, is connected with resistance R 3 between the emitter-base bandgap grading of triode Q1 and the base stage; The grounded emitter of NPN triode Q2; the output OUT2 of the charging control signal of comparator U1 links to each other in base stage and the super-charge super-discharge protective circuit; and link to each other with the ACC signal input part by current-limiting resistance R6, be connected with resistance R 5 between the emitter-base bandgap grading of NPN triode Q2 and the base stage.
POWER1 is external main electricity input, and POWER2 is that order is to diode D0 between POWER1 and the POWER1 to the internal circuit power supply.VBAT represents the reserve battery positive pole.Behind car engine, ACC_IN holding wire level is high, after the electric current process R6 current limliting, makes the base stage level of triode Q2 be height, thereby makes the collector and emitter conducting of Q2, the about 0.7V of the collector voltage of Q2.At this moment the base stage of PNP triode Q1 is a low level, and emitter voltage is high, so the emitter and collector conducting of Q1, main electric POWER1 gives reserve battery VBAT charging through R2 and Q1.
In embodiment of the present utility model, discharge circuit is by resistance R 7, R8, R9, R10, R11, C1, and NPN triode Q3, Q4, diode D2, D3, PMOS field effect transistor MOS1 forms.Wherein, the negative pole of diode D2 connects the feeder ear of vehicle electronic device, and positive pole connects the drain electrode of field effect transistor MOS1; The source electrode of field effect transistor MOS1 links to each other with the positive pole of reserve battery, and grid links to each other with the collector electrode of triode Q3 by resistance R 8, drain with grid between link to each other by resistance R 7; The grounded emitter of triode Q3, base stage links to each other with power supply POW_C by resistance R 9.Diode D3 in the discharge circuit, resistance R 10 and NPN triode Q4 form main electricity work state detection module; Wherein, the positive pole of diode D3 connects main electrical input, and negative pole links to each other with the base stage of NPN triode Q4 by resistance R 10.The grounded emitter of triode Q4, between base stage and the emitter and be connected with resistance R 11 and capacitor C 1, its current collection is the discharge control signal output very, is connected in the base stage of triode Q3.
Under the equipment normal operating conditions, the POWER1 line is a high level, the collector electrode of Q4 and the conducting of emission collection, both the base stage of Q3 was dragged down and was 0.7V, and this moment, Q3 was in cut-off state, and the gate-source voltage of MOS1 equates, MOS1 is in cut-off state, and reserve battery can not be powered to main.When main electricity broke, both the POWER1 line was a low level, and Q4 ends.This moment, the base stage of Q3 was a high level, the collector and emitter conducting of Q3, and this moment, the grid of MOS1 was a low level, and source electrode is a high level, and reserve battery VBAT place electric current flows to POWER2 through MOS1, D2, gives power devices.MOS1 not only plays the effect of switch control, also has the effect of amplified current.
In embodiment of the present utility model, the super-charge super-discharge protective circuit is by resistance R 12, R13, R14, R15, R16, capacitor C 2, C3, and two-way voltage comparator U1, controllable silicon U2 forms.Wherein resistance R 12, R13 are serially connected between the positive pole and ground of reserve battery, the road normal phase input end of R12 and the termination comparator U1 that links to each other of R13; Resistance R 15, R16 are serially connected between the positive pole and ground of reserve battery, another road normal phase input end of R15 and the termination comparator U1 that links to each other of R16; Reference voltage connects the inverting input of comparator U1; The first via output OUT1 of comparator U1 connects the base stage of triode Q3 in the described discharge circuit, and the second tunnel output OUT2 of comparator U1 connects the base stage of triode Q2 in the described charging circuit.
Reference voltage provides circuit to comprise controllable silicon U2, resistance R 14, capacitor C 2, wherein, the plus earth of controllable silicon U2, negative pole links to each other with power supply POW_C by resistance R 14, and the control utmost point is connected with negative pole, and capacitor C 2 is connected between positive pole and the negative pole.
As shown in the figure, certain set point is provided is the reference voltage of V3 to U2.Lower threshold value and the upper threshold value of supposing backup battery voltage are respectively VBAT1 and VBAT2.V1 is the partial pressure value of reserve battery cathode voltage VBAT, receives the road normal phase input end of comparator U1, and reference voltage V 3 is received the inverting input of this road comparator.V1=VBAT1 * R13/ (R12+R13) chooses suitable R12, the resistance of R13, makes V1=V3.Reserve battery VBAT in discharge process constantly reduces, and makes the magnitude of voltage of V1 also constantly reduce.As VBAT＞VBAT0 both backup battery voltage during greater than the lower threshold value set, V1＞V3, then high level of the OUT1 pin of comparator U1 output makes that the VBAT-LC line is a high level, the collector and emitter conducting of Q3, and reserve battery can continue external discharge; As VBAT≤VBAT1, when both backup battery voltage is less than the lower threshold value set, V1≤V3, then low level of the OUT1 pin of comparator U1 output makes that the VBAT-LC line is a low level, and the collector and emitter of Q3 ends, and reserve battery stops external discharge.So just can prevent the over-discharge can of reserve battery.
V2 also is the partial pressure value of reserve battery cathode voltage VBAT, receives the inverting input on another road of comparator U1, and reference voltage V 3 is received the normal phase input end of this road comparator.V2=VBAT2 * R15/ (R15+R16) chooses suitable R15, the resistance of R16, makes V2=V3.Reserve battery VBAT in charging process constantly increases, and makes the magnitude of voltage of V2 also constantly increase.When V2 〉=V3, both the voltage VBAT of reserve battery was greater than its upper threshold value VBAT2, and at this moment the pin OUT2 of comparator U1 can become low level by high level, and control signal wire VBAT-HC is a low level, and Q1 and Q2 end, and main electricity stops to charge to reserve battery.So just can prevent overcharging of reserve battery.
The super-charge super-discharge protective circuit of reserve battery is described for an embodiment below.Automobile with 12V power supply is an example, supposes that the lower threshold value of 12V backup battery voltage and upper threshold value are respectively VBAT1=8V and VBAT2=13.1V, and both reserve battery discharged and recharged use and should remain in the above-mentioned voltage range.Choose the controllable silicon that clamp voltage is 2.5V, get R12=22K, R13=10K., when VBAT=8V, calculate V1=2.5V; When VBAT＜8V, VBAT-LC is a low level, and reserve battery stops discharge; Get R15=12K, R16=51K, when VBAT=13.1V, calculate V2=2.5V, when VBAT＞13.1V, VBAT-HC is a low level, main electricity stops to charge to reserve battery.
Claims (7)
1, a kind of reserve battery charge-discharge circuit of vehicle electronic device, comprise the charging circuit that links to each other with the electric main road, the discharge circuit that links to each other with reserve battery and super-charge super-discharge protective circuit, it is characterized in that described super-charge super-discharge protective circuit comprises the sample circuit that is used to detect the current voltage of reserve battery and with described current voltage and reference voltage compares and according to the comparison circuit of comparative result output charge and discharge control signal; Charge switch module in described comparison circuit and the charging circuit and the discharge switch module in the discharge circuit are connected; Described charging circuit also comprises the ACC signal input interface that links to each other with the charge switch module.
2, reserve battery charge-discharge circuit according to claim 1, it is characterized in that described discharge circuit comprises the main electricity work state detection module that links to each other with the discharge switch module, be used to detect main electric work state and export discharge control signal according to the electric work state of described master.
3, reserve battery charge-discharge circuit according to claim 2 is characterized in that, described charge switch module comprises PNP triode Q1, NPN triode Q2; Wherein, the base stage of NPN triode Q2 links to each other with the charging control signal output of described comparator and described ACC signal input interface, emitter grounding, and collector electrode links to each other with the base stage of PNP triode Q1 by a resistance R 4; The collector electrode of PNP triode Q1 links to each other with reserve battery, and emitter-base bandgap grading links to each other with the electric main road by resistance R 2 and diode D1, wherein the anodal termination electric main road of diode D1.
4, reserve battery charge-discharge circuit according to claim 2 is characterized in that, described discharge switch module comprises NPN triode Q3 and field effect transistor MOS1; Wherein, the base stage of described NPN triode Q3 links to each other with the discharge control signal output of the discharge control signal output of described comparator and described main electricity work state detection module, emitter grounding, collector electrode links to each other with the grid of field effect transistor MOS1 by resistance R 8; The source electrode of field effect transistor MOS1 links to each other with reserve battery, and drain electrode links to each other the wherein drain electrode of the anodal termination field effect transistor MOS1 of diode D2 by diode D2 with vehicle electronic device.
5, reserve battery charge-discharge circuit according to claim 4 is characterized in that, described main electricity work state detection module comprises diode D3, resistance R 10 and NPN triode Q4; Wherein, the positive pole of diode D3 connects the electric main road, and negative pole links to each other with the base stage of NPN triode Q4 by resistance R 10; The grounded emitter of triode Q4 is connected with resistance R 11 and capacitor C 1 between base stage and the emitter, current collection is the discharge control signal output very.
6, reserve battery charge-discharge circuit according to claim 2 is characterized in that, in the described super-charge super-discharge protective circuit, sample circuit comprises resistance R 12,13 and resistance R 15, R16; Described comparison circuit comprises that two-way voltage comparator U1 and reference voltage provide circuit; Wherein resistance R 12, R13 are serially connected between the positive pole and ground of reserve battery, the road normal phase input end of R12 and the termination comparator U1 that links to each other of R13, resistance R 15, R16 are serially connected between the positive pole and ground of reserve battery, another road normal phase input end of R15 and the termination comparator U1 that links to each other of R16, reference voltage connects the inverting input of comparator; The first via output OUT1 of comparator U1 is the discharge control signal output, and the second tunnel output OUT2 of comparator U1 is the charging control signal output.
7, reserve battery charge-discharge circuit according to claim 6, it is characterized in that, described reference voltage provides circuit to comprise controllable silicon U2, resistance R 14, capacitor C 2, wherein, the plus earth of controllable silicon U2, negative pole links to each other with power supply POW_C by resistance R 14, and the control utmost point is connected with negative pole, and capacitor C 2 is connected between positive pole and the negative pole.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201454549U CN201004559Y (en) | 2006-12-29 | 2006-12-29 | A charging and discharging circuit for backup battery of vehicular electronic device |
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| Application Number | Priority Date | Filing Date | Title |
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| CNU2006201454549U CN201004559Y (en) | 2006-12-29 | 2006-12-29 | A charging and discharging circuit for backup battery of vehicular electronic device |
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| CNU2006201454549U Expired - Lifetime CN201004559Y (en) | 2006-12-29 | 2006-12-29 | A charging and discharging circuit for backup battery of vehicular electronic device |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931708A (en) * | 2012-11-19 | 2013-02-13 | 深圳市航盛电子股份有限公司 | Charge protecting device and method of vehicle-mounted terminal |
| CN104009504A (en) * | 2013-02-26 | 2014-08-27 | 深圳市赛格导航科技股份有限公司 | Satellite positioning system terminal standby battery management method and system |
| CN104283195A (en) * | 2013-01-15 | 2015-01-14 | 费新华 | Storage battery protection circuit preventing overcharge |
| CN104467091A (en) * | 2014-12-01 | 2015-03-25 | 中国船舶重工集团公司第七二六研究所 | Device for achieving automatic discharge of energy storage capacitors after power failure of sonar equipment |
| CN104852418A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method and system preventing over-discharge of battery during charging process |
| CN104882915A (en) * | 2014-02-28 | 2015-09-02 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit and lamp |
| CN106740591A (en) * | 2016-12-13 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of vehicle-mounted HUD HUDs power-supply management system |
| CN107732987A (en) * | 2016-08-10 | 2018-02-23 | 深圳市沃特玛电池有限公司 | Over-discharge protection circuit |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
| TWI749209B (en) * | 2017-04-13 | 2021-12-11 | 日商艾普凌科有限公司 | Charge and discharge control circuit and battery device |
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2006
- 2006-12-29 CN CNU2006201454549U patent/CN201004559Y/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102931708A (en) * | 2012-11-19 | 2013-02-13 | 深圳市航盛电子股份有限公司 | Charge protecting device and method of vehicle-mounted terminal |
| CN102931708B (en) * | 2012-11-19 | 2015-05-13 | 深圳市航盛电子股份有限公司 | Charge protecting device and method of vehicle-mounted terminal |
| CN104283195A (en) * | 2013-01-15 | 2015-01-14 | 费新华 | Storage battery protection circuit preventing overcharge |
| CN104009504B (en) * | 2013-02-26 | 2016-12-28 | 深圳市赛格导航科技股份有限公司 | Global position system terminal reserve battery management method and system |
| CN104009504A (en) * | 2013-02-26 | 2014-08-27 | 深圳市赛格导航科技股份有限公司 | Satellite positioning system terminal standby battery management method and system |
| CN104882915B (en) * | 2014-02-28 | 2019-07-02 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit and lamps |
| CN104882915A (en) * | 2014-02-28 | 2015-09-02 | 深圳市海洋王照明工程有限公司 | Lithium battery charging circuit and lamp |
| CN104467091A (en) * | 2014-12-01 | 2015-03-25 | 中国船舶重工集团公司第七二六研究所 | Device for achieving automatic discharge of energy storage capacitors after power failure of sonar equipment |
| CN104852418A (en) * | 2014-12-19 | 2015-08-19 | 北汽福田汽车股份有限公司 | Method and system preventing over-discharge of battery during charging process |
| CN107732987A (en) * | 2016-08-10 | 2018-02-23 | 深圳市沃特玛电池有限公司 | Over-discharge protection circuit |
| CN106740591A (en) * | 2016-12-13 | 2017-05-31 | 中国航空工业集团公司洛阳电光设备研究所 | A kind of vehicle-mounted HUD HUDs power-supply management system |
| TWI749209B (en) * | 2017-04-13 | 2021-12-11 | 日商艾普凌科有限公司 | Charge and discharge control circuit and battery device |
| CN113103919A (en) * | 2021-05-24 | 2021-07-13 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
| CN113103919B (en) * | 2021-05-24 | 2022-03-22 | 安徽安凯汽车股份有限公司 | Electric motor coach storage battery protection system and method |
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