CN104242252A - Battery over-discharge protecting circuit - Google Patents
Battery over-discharge protecting circuit Download PDFInfo
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- CN104242252A CN104242252A CN201310238856.8A CN201310238856A CN104242252A CN 104242252 A CN104242252 A CN 104242252A CN 201310238856 A CN201310238856 A CN 201310238856A CN 104242252 A CN104242252 A CN 104242252A
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Abstract
The invention discloses a battery over-discharge protecting circuit used for disconnecting a battery with a load when the battery is overdischarged. The battery over-discharge protecting circuit comprises a voltage detection module, a voltage comparison module, a switch module and a battery protecting module, wherein the voltage detection module is used for detecting the voltage of the battery, the voltage comparison module is used for comparing the reference voltage with the output voltage of the voltage detection module, the switch module is used for outputting switch signals according to output signals of the voltage comparison module, and the battery protecting module is used for controlling connection between the battery and the load. According to the battery over-discharge protecting circuit, the voltage of the battery is detected at any time through the voltage detection module, the voltage comparison module controls the switch module to be turned on according to the voltage output by the voltage detection module when the voltage detection module detects that the battery is overdischarged, the switch module controls the battery protecting module to disconnect the battery with the load after being turned on, and therefore the phenomena that the battery continuously supplies power to the load when overdischarged, the battery is deeply overdischarged are avoided.
Description
Technical field
The present invention relates to battery protecting circuit, particularly relate to a kind of battery over-discharge protection circuit preventing from battery from crossing putting.
Background technology
Battery discharges the electricity of internal reservoir, and after voltage reaches certain value, continuing electric discharge will cause overdischarge, usually determines discharge cut-off voltage according to discharging current.Battery is crossed to put to cross to the consequence of bringing on a disaster property of battery, particularly big current and is put, or battery impact of being repeatedly excessively rivals in a contest is larger.Generally speaking, overdischarge can make inner pressure of battery raise, and both positive and negative polarity active material invertibity is damaged, even if charging also can only partly recover, capacity also has obvious decay, and the useful life of battery is shortened.
Summary of the invention
Based on this, be necessary to provide a kind of battery over-discharge protection circuit preventing from battery from crossing putting.
A kind of battery over-discharge protection circuit, disconnect the connection between battery and load when putting for crossing at battery, comprise the voltage detection module for detecting cell voltage, for more described voltage detection module output voltage and reference voltage voltage comparison module, for output signal according to described voltage comparison module output switching signal switch module and for controlling the battery protection module that battery is connected with load;
Described voltage detection module input is used for being electrically connected with anode, and the output of described voltage detection module is electrically connected with the input of described voltage comparison module, the earth terminal ground connection of described voltage detection module;
The reference edge input reference voltage of described voltage comparison module, the output of described voltage comparison module is electrically connected with the control end of described switch module, the power supply termination anode of described voltage comparison module, the earth terminal ground connection of described voltage comparison module;
The output of described switch module is electrically connected with the input of described battery protection module, the earth terminal ground connection of described switch module;
The output of described battery protection module is for connecting anode and load;
Described voltage detection module detects that battery was in when putting state, described voltage comparison module is switch module conducting according to the output voltage control of described voltage detection module, controls the connection that described battery protection module disconnects battery and load after described switch module conducting;
When described voltage detection module detects that cell voltage is normal; described voltage comparison module is switch module cut-off according to the output voltage control of described voltage detection module, and the output controlling described battery protection module after described switch module cut-off connects anode and load.
Wherein in an embodiment, also comprise and be used to indicate battery and cross the mistake of putting and put indicating module; The described mistake input of putting indicating module described battery protection module disconnect anode be connected with load time, be electrically connected with the output of described load protection module, described mistake puts the earth terminal ground connection of indicating module.
Wherein in an embodiment; described mistake puts normally opened contact, divider resistance R5 and LED that indicating module comprises normal open switch; described divider resistance R5 one end is connected with the positive pole of described LED; the minus earth of described LED; the normally opened contact of another termination normal open switch of described divider resistance R5, the normally opened contact of described normal open switch is used for when described battery protection module disconnection anode is connected with load, is electrically connected with the output of described battery protection module.
Wherein in an embodiment, described voltage detection module comprises adjustable resistance R1 and divider resistance R2, described adjustable resistance R1 and described divider resistance R2 is connected between anode and earth terminal, one end of described adjustable resistance R1 is electrically connected with described anode, one end ground connection of described divider resistance R2, described adjustable resistance R1 is electrically connected with the input of described voltage comparison module with the points of common connection of described divider resistance R2.
Wherein in an embodiment, described voltage comparison module comprises divider resistance R3, divider resistance R4 and comparator U1, the normal phase input end of described comparator U1 is electrically connected with the output of described voltage detection module, the inverting input input reference voltage of described comparator U1, the output of described comparator U1 is electrically connected with one end of described divider resistance R3, the other end of described divider resistance R3 is electrically connected with one end of described divider resistance R4, the other end ground connection of described divider resistance R4, the points of common connection of described divider resistance R3 and described divider resistance R4 is electrically connected with the control end of described switch module.
Wherein in an embodiment; described switch module comprises triode Q1; the base stage of described triode Q1 is electrically connected with the output of described voltage comparison module, the grounded collector of described triode Q1, and the emitter of described triode Q1 is electrically connected with the input of described battery protection module.
Wherein in an embodiment; described battery protection module comprises relay K and diode D1; described diode D1 is parallel to the two ends of described relay K electronic coil; the positive pole of described diode D1 is electrically connected with the output of described switch module with the points of common connection of described relay K electronic coil; the negative pole of described diode D1 is electrically connected with described anode with the points of common connection of described relay K electronic coil, and the normally closed switch K-1 of described relay K is connected between described anode and load.
Above-mentioned battery over-discharge protection circuit detects the voltage of battery at any time by voltage detection module; when voltage detection module detect battery be in put state time; the voltage cut-out module conducting that voltage comparison module now exports according to voltage detection module; the connection that battery protection module disconnects battery and load is controlled after switch module conducting; thus prevent battery from continuing load supplying when crossing and putting, avoiding battery to occur, the degree of depth is crossed puts phenomenon.
Accompanying drawing explanation
Fig. 1 is the module map of battery over-discharge protection circuit;
Fig. 2 is the schematic diagram of battery over-discharge protection circuit.
Embodiment
As shown in Figure 1, be the module map of battery over-discharge protection circuit.
A kind of battery over-discharge protection circuit; disconnect the connection between battery and load when putting for crossing at battery, comprise the voltage detection module 102 for detecting cell voltage, for more described voltage detection module 102 output voltage and reference voltage voltage comparison module 104, for output signal according to described voltage comparison module 104 output switching signal switch module 106 and for controlling the battery protection module 108 that battery is connected with load.
Described voltage detection module 102 input is used for being electrically connected with anode, and the output of described voltage detection module 102 is electrically connected with the input of described voltage comparison module 104, the earth terminal ground connection of described voltage detection module 102.
The reference edge input reference voltage of described voltage comparison module 104, the output of described voltage comparison module 104 is electrically connected with the control end of described switch module 106, the power supply termination anode of described voltage comparison module 104, the earth terminal ground connection of described voltage comparison module 104.
The output of described switch module 106 is electrically connected with the input of described battery protection module 108, the earth terminal ground connection of described switch module 106.
The output of described battery protection module 108 is for connecting anode and load.
Described voltage detection module 102 detects that battery was in when putting state; described voltage comparison module 104 is switch module 106 conducting according to the output voltage control of described voltage detection module 102, controls the connection that described battery protection module 108 disconnects battery and load after the conducting of described switch module 106.
When described voltage detection module 102 detects that cell voltage is normal; described voltage comparison module 104 switch module 106 according to the output voltage control of described voltage detection module 102 ends, and the output that described switch module 106 ends the described battery protection module 108 of rear control connects anode and load.
Voltage detection module 102 for detecting cell voltage, and converts the cell voltage detected to output voltage and exports to voltage comparison module 104.Particularly, when battery is crossed and put, the output voltage of voltage detection module 102 is less than reference voltage; When battery is normal, the output voltage of voltage detection module 102 is more than or equal to reference voltage.
Voltage comparison module 104 for the magnitude relationship between the output voltage of comparative voltage detection module 102 and reference voltage, and exports comparative result.Particularly, when battery is crossed and put, the output voltage of voltage detection module 102 is less than reference voltage, voltage comparison module 104 output low level; When battery is normal, the output voltage of voltage detection module 102 is more than or equal to reference voltage, and voltage comparison module 104 exports high level.
Switch module 106 is for output switching signal, thus the connection status of control voltage protection module 108.When voltage comparison module 104 output low level, switch module 106 conducting, makes voltage protection module 108 obtain electric after switch module 106 conducting, when voltage protection module 108 obtains electric, the output of voltage protection module 108 connects anode and load.When voltage comparison module 104 exports high level, switch module 106 ends, and switch module 106 makes voltage protection module 108 dead electricity after ending, and during voltage protection module 108 dead electricity, the output of voltage protection module 108 disconnects the connection of battery and load.Battery stops load supplying, thus avoids battery to cross putting.
Incorporated by reference to Fig. 2.
Voltage detection module 102 comprises adjustable resistance R1 and divider resistance R2, described adjustable resistance R1 and described divider resistance R2 is connected between anode and earth terminal, one end of described adjustable resistance R1 is electrically connected with described anode, one end ground connection of described divider resistance R2, described adjustable resistance R1 is electrically connected with the input of described voltage comparison module 104 with the points of common connection of described divider resistance R2.
Voltage comparison module 104 comprises divider resistance R3, divider resistance R4 and comparator U1, the normal phase input end of described comparator U1 is electrically connected with the output of described voltage detection module 102, the inverting input input reference voltage of described comparator U1, the output of described comparator U1 is electrically connected with one end of described divider resistance R3, the other end of described divider resistance R3 is electrically connected with one end of described divider resistance R4, the other end ground connection of described divider resistance R4, the points of common connection of described divider resistance R3 and described divider resistance R4 is electrically connected with the control end of described switch module 106.
Switch module 106 comprises triode Q1; the base stage of described triode Q1 is electrically connected with the output of described voltage comparison module 104; the grounded collector of described triode Q1, the emitter of described triode Q1 is electrically connected with the input of described battery protection module 108.
Battery protection module 108 comprises relay K and diode D1; described diode D1 is parallel to the two ends of described relay K electronic coil; the positive pole of described diode D1 is electrically connected with the output of described switch module 106 with the points of common connection of described relay K electronic coil; the negative pole of described diode D1 is electrically connected with described anode with the points of common connection of described relay K electronic coil, and the normally closed switch K-1 of described relay K is connected between described anode and load.
Battery over-discharge protection circuit also comprises and is used to indicate battery and crosses the mistake of putting and put indicating module 110; The described mistake input of putting indicating module 110 described battery protection module 108 disconnect anode be connected with load time, be electrically connected with described load protection module 108 output, described mistake puts the earth terminal ground connection of indicating module 110.
Cross normally opened contact, divider resistance R5 and LED putting indicating module 110 and comprise normal open switch; described divider resistance R5 one end is connected with the positive pole of described LED; the minus earth of described LED; the normally opened contact of another termination normal open switch of described divider resistance R5, when the normally opened contact of described normal open switch is connected with load for disconnecting anode at described battery protection module 108, is electrically connected with the output of described battery protection module 108.
Based on above-mentioned all embodiments, the operation principle of battery over-discharge protection circuit is as follows:
First be installed with according to the overdischarge of battery and put reference voltage size.After reference voltage is provided with, the resistance value of adjustable resistance can be determined according to the resistance size of adjustable resistance R1 and divider resistance R2 and reference voltage.Therefore, after the resistance of fixing adjustable resistance R1, just can determine that, when battery occurs that overdischarge is pressed, voltage detection module 102 can detect.
When the voltage of battery is normal, adjustable resistance R1 and divider resistance R2 is according to voltage divider principle, and the voltage that divider resistance R2 gets at two ends is higher than reference voltage, and therefore comparator U1 exports high level.High level is supplied to the base stage of triode Q1 by the high level that comparator U1 exports by divider resistance R3 and divider resistance R4.Because triode Q1 is PNP type triode, therefore, when the base level of triode Q1 is high level, triode Q1 ends.After triode Q1 ends, the electronic coil of relay K must not be electric, and therefore, the normally closed switch K-1 of relay K remains closed.Anode is then connected with load by the normally closed switch K-1 of relay K, battery bio-occlusion load supplying.
The voltage of battery reach overdischarge pressure time, adjustable resistance R1 and divider resistance R2 according to voltage divider principle, the voltage that divider resistance R2 gets at two ends lower than reference voltage, therefore comparator U1 output low level.High level is supplied to the base stage of triode Q1 by the low level that comparator U1 exports by divider resistance R3 and divider resistance R4.Because triode Q1 is PNP type triode, therefore, when the base level of triode Q1 is low level, triode Q1 conducting.After triode Q1 conducting, the electronic coil of relay K obtains electric, and the normally closed switch K-1 of relay K disconnects the connection with load, and is connected with the normally opened contact excessively putting the normal open switch of indicating module 110.Thus anode disconnects and the connection of load, and puts indicating module 110 and be connected with crossing, and therefore, LED lights, and pilot cell was now in the state of putting.
Above-mentioned battery over-discharge protection circuit detects the voltage of battery at any time by voltage detection module 102; when voltage detection module 102 detect battery be in put state time; voltage cut-out module 106 conducting that voltage comparison module 104 now exports according to voltage detection module 102; the connection that battery protection module 108 disconnects battery and load is controlled after switch module 106 conducting; thus prevent battery from continuing load supplying when crossing and putting, avoiding battery to occur, the degree of depth is crossed puts phenomenon.
The above embodiment only have expressed several execution mode of the present invention, and it describes comparatively concrete and detailed, but therefore can not be interpreted as the restriction to the scope of the claims of the present invention.It should be pointed out that for the person of ordinary skill of the art, without departing from the inventive concept of the premise, can also make some distortion and improvement, these all belong to protection scope of the present invention.Therefore, the protection range of patent of the present invention should be as the criterion with claims.
Claims (7)
1. a battery over-discharge protection circuit, the connection between battery and load is disconnected when putting for crossing at battery, it is characterized in that, comprise the voltage detection module for detecting cell voltage, for more described voltage detection module output voltage and reference voltage voltage comparison module, for output signal according to described voltage comparison module output switching signal switch module and for controlling the battery protection module that battery is connected with load;
Described voltage detection module input is used for being electrically connected with anode, and the output of described voltage detection module is electrically connected with the input of described voltage comparison module, the earth terminal ground connection of described voltage detection module;
The reference edge input reference voltage of described voltage comparison module, the output of described voltage comparison module is electrically connected with the control end of described switch module, the power supply termination anode of described voltage comparison module, the earth terminal ground connection of described voltage comparison module;
The output of described switch module is electrically connected with the input of described battery protection module, the earth terminal ground connection of described switch module;
The output of described battery protection module is for connecting anode and load;
Described voltage detection module detects that battery was in when putting state, described voltage comparison module is switch module conducting according to the output voltage control of described voltage detection module, controls the connection that described battery protection module disconnects battery and load after described switch module conducting;
When described voltage detection module detects that cell voltage is normal; described voltage comparison module is switch module cut-off according to the output voltage control of described voltage detection module, and the output controlling described battery protection module after described switch module cut-off connects anode and load.
2. battery over-discharge protection circuit according to claim 1, is characterized in that, also comprises being used to indicate battery and crossing the mistake of putting and put indicating module; The described mistake input of putting indicating module described battery protection module disconnect anode be connected with load time, be electrically connected with the output of described load protection module, described mistake puts the earth terminal ground connection of indicating module.
3. battery over-discharge protection circuit according to claim 2; it is characterized in that; described mistake puts normally opened contact, divider resistance R5 and LED that indicating module comprises normal open switch; described divider resistance R5 one end is connected with the positive pole of described LED; the minus earth of described LED; the normally opened contact of another termination normal open switch of described divider resistance R5, the normally opened contact of described normal open switch is used for when described battery protection module disconnection anode is connected with load, is electrically connected with the output of described battery protection module.
4. battery over-discharge protection circuit according to claim 1; it is characterized in that; described voltage detection module comprises adjustable resistance R1 and divider resistance R2; described adjustable resistance R1 and described divider resistance R2 is connected between anode and earth terminal; one end of described adjustable resistance R1 is electrically connected with described anode; one end ground connection of described divider resistance R2, described adjustable resistance R1 is electrically connected with the input of described voltage comparison module with the points of common connection of described divider resistance R2.
5. battery over-discharge protection circuit according to claim 1, it is characterized in that, described voltage comparison module comprises divider resistance R3, divider resistance R4 and comparator U1, the normal phase input end of described comparator U1 is electrically connected with the output of described voltage detection module, the inverting input input reference voltage of described comparator U1, the output of described comparator U1 is electrically connected with one end of described divider resistance R3, the other end of described divider resistance R3 is electrically connected with one end of described divider resistance R4, the other end ground connection of described divider resistance R4, the points of common connection of described divider resistance R3 and described divider resistance R4 is electrically connected with the control end of described switch module.
6. battery over-discharge protection circuit according to claim 1; it is characterized in that; described switch module comprises triode Q1; the base stage of described triode Q1 is electrically connected with the output of described voltage comparison module; the grounded collector of described triode Q1, the emitter of described triode Q1 is electrically connected with the input of described battery protection module.
7. battery over-discharge protection circuit according to claim 1; it is characterized in that; described battery protection module comprises relay K and diode D1; described diode D1 is parallel to the two ends of described relay K electronic coil; the positive pole of described diode D1 is electrically connected with the output of described switch module with the points of common connection of described relay K electronic coil; the negative pole of described diode D1 is electrically connected with described anode with the points of common connection of described relay K electronic coil, and the normally closed switch K-1 of described relay K is connected between described anode and load.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310238856.8A CN104242252B (en) | 2013-06-14 | 2013-06-14 | Battery over-discharge protection circuit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310238856.8A CN104242252B (en) | 2013-06-14 | 2013-06-14 | Battery over-discharge protection circuit |
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| CN104242252A true CN104242252A (en) | 2014-12-24 |
| CN104242252B CN104242252B (en) | 2018-05-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104810781A (en) * | 2015-04-24 | 2015-07-29 | 重庆康美唯外科器械有限公司 | Protective device for protecting switching circuit and load |
| CN106058817A (en) * | 2016-07-04 | 2016-10-26 | 李宝 | Power-off protection device for storage battery |
| CN106253238A (en) * | 2016-08-19 | 2016-12-21 | 宁波中荣声学科技有限公司 | A kind of battery low-voltage latching circuit |
| WO2023284781A1 (en) * | 2021-07-14 | 2023-01-19 | 深圳市道通智能航空技术股份有限公司 | Battery pack management circuit and battery pack |
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| CN2148414Y (en) * | 1993-03-08 | 1993-12-01 | 刘振坤 | Single-phase multifunction safety energy-saving controller |
| CN101908755A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Overdischarge protector for battery |
| CN202888874U (en) * | 2012-08-14 | 2013-04-17 | 深圳市海泰林科技有限公司 | Distributed operation power supply |
| CN103117536A (en) * | 2013-01-15 | 2013-05-22 | 费新华 | Storage battery protective circuit |
| CN103135062A (en) * | 2011-11-30 | 2013-06-05 | 凯迈(洛阳)电子有限公司 | Charge-discharge monitoring method of high-efficiency power battery |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2148414Y (en) * | 1993-03-08 | 1993-12-01 | 刘振坤 | Single-phase multifunction safety energy-saving controller |
| CN101908755A (en) * | 2009-06-02 | 2010-12-08 | 鸿富锦精密工业（深圳）有限公司 | Overdischarge protector for battery |
| CN103135062A (en) * | 2011-11-30 | 2013-06-05 | 凯迈(洛阳)电子有限公司 | Charge-discharge monitoring method of high-efficiency power battery |
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| CN103117536A (en) * | 2013-01-15 | 2013-05-22 | 费新华 | Storage battery protective circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104810781A (en) * | 2015-04-24 | 2015-07-29 | 重庆康美唯外科器械有限公司 | Protective device for protecting switching circuit and load |
| CN104810781B (en) * | 2015-04-24 | 2019-01-22 | 重庆迈科唯医疗科技有限公司 | A kind of protective switch circuit and load protector |
| CN106058817A (en) * | 2016-07-04 | 2016-10-26 | 李宝 | Power-off protection device for storage battery |
| CN106253238A (en) * | 2016-08-19 | 2016-12-21 | 宁波中荣声学科技有限公司 | A kind of battery low-voltage latching circuit |
| WO2023284781A1 (en) * | 2021-07-14 | 2023-01-19 | 深圳市道通智能航空技术股份有限公司 | Battery pack management circuit and battery pack |
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| CN104242252B (en) | 2018-05-18 |
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