CN104426140A - Software-hardware-combined storage battery overcharging protection method - Google Patents
Software-hardware-combined storage battery overcharging protection method Download PDFInfo
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- CN104426140A CN104426140A CN201310408304.7A CN201310408304A CN104426140A CN 104426140 A CN104426140 A CN 104426140A CN 201310408304 A CN201310408304 A CN 201310408304A CN 104426140 A CN104426140 A CN 104426140A
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Abstract
The invention provides a software-hardware-combined storage battery overcharging protection method which comprises the steps of providing an overcharging enabling switch, detecting voltage of a storage battery monomer by the overcharging enabling switch, and judging whether the monomer fails; if the monomer fails, performing overcharging protection on the monomer; if the monomer does not fail, canceling the overcharging protection on the monomer. By a software control mode and a hardware control mode, overcharging protection on the storage battery are realized, and the defects of no overcharging protection measure and poor overcharging protection effect under a condition that the storage battery monomer fails in the prior art are overcome; moreover, the software-hardware-combination storage battery overcharging protection method is simple and feasible, and engineering is easily implemented; the reliability and the safety of a satellite power supply system are improved.
Description
Technical field
The present invention relates to space power control technology field, particularly relate to a kind of batteries overcharge protection method of software and hardware combining.
Background technology
Lithium-ions battery refers to the secondary cell using Li+ inlaid scheme as positive and negative electrode active material.Compared with traditional zinc-silver oxide cell, cadmium nickel, hydrogen-nickel battery, the specific energy of lithium-ions battery is high, operating voltage is high, temperature limit is wide, self-discharge rate is low, have extended cycle life, fail safe is good.Therefore, in space industry, lithium-ions battery becomes the cadmium nickel of alternative current mainstream applications, the third generation satellite accumulation power supply of hydrogen-nickel battery.If replace the accumulation power supply that the spacecrafts such as current satellite are used with lithium ion battery, the quality that accumulation power supply is shared in power subsystem can be reduced to 10% ~ 15% by 30% ~ 40%, greatly reduce launch cost, increase payload.
Use lithium-ions battery group with holding water, effectively can extend the useful life of lithium-ions battery, prevent the generation of security incident.Lithium ion battery, compared with cadmium nickel, hydrogen-nickel battery, has the difference that maximum: lithium-ions battery is forbidden overcharge, the degree of depth to overcharge inside battery organic electrolyte can be caused to resolve into gas, and storage battery generates heat, battery jar body deformability, even housing explosion.Usual employing electronic circuit ensures that the charging final pressure of lithium-ions battery limits within the limits prescribed all the time, and to avoid, charging voltage is excessive causes expendable infringement to lithium-ions battery.Therefore special charge management circuit must be designed to control the charging process of satellite lithium-ions battery.
The charge control system of current satellite lithium-ions battery does not consider the additives for overcharge protection under certain joint monomer failure conditions, and the satellite power system program of lower computer that adopts realizes more, or adopts power-supply system analog circuit to realize, and its reliability is not high.
Summary of the invention
The object of the invention is to the batteries overcharge protection method proposing a kind of software and hardware combining, to solve the problem of the additives for overcharge protection under monomer failure conditions, improve the reliability of lithium-ions battery group.
In order to reach foregoing invention object, the invention provides a kind of batteries overcharge protection method of software and hardware combining, comprising providing and overcharge enable switch, overcharge by described the monomer voltage that enable switch detects described storage battery, judge whether that monomer lost efficacy; If described monomer lost efficacy, then over-charge protective was carried out to described monomer; If described monomer did not lose efficacy, then cancelled the over-charge protective to described monomer.
Optionally, describedly judge whether monomer lost efficacy and also comprise: when storage battery exists monomer voltage lower than 3.3V, the described enable switch that overcharges is sent and overcharges enable switch and lead to instruction.
Optionally, also comprise the quantity of state overcharging enable switch described in detection: if described in overcharge enable switch quantity of state when being 1, represent that overcharging enable switch connects; Otherwise continue to send and overcharge enable switch to overcharging enable switch and lead to instruction.
Optionally, described in overcharge after enable switch connects, detect and store described battery cell voltage, judge whether described batteries exists certain joint monomer failure conditions.
Optionally, if the monomer voltage detected is lower than 2.9V, then judge that corresponding monomer lost efficacy; If the monomer voltage detected is higher than 3.3V, then judge that corresponding monomer did not lose efficacy.
Optionally, provide storage battery to feed back backup switch, lost efficacy if storage battery exists monomer, then send storage battery feedback backup switch and lead to instruction to described storage battery feedback backup switch.
Optionally, if described storage battery feedback backup switch is connected, then the power subsystem charge control loop of described batteries switches to the control of Standby control circuit for final pressure of charging of described batteries, and over-charge protective completes.
Optionally, if when described storage battery feedback backup switch state is 1, then described storage battery feedback backup switch of crossing is connected; If when described storage battery feedback backup switch state is 0, then described storage battery feedback backup switch of crossing disconnects.
Optionally, comprising: provide storage battery to feed back backup switch, lost efficacy if storage battery does not exist monomer, then send the order of storage battery feedback backup switch severed finger to described storage battery feedback backup switch.
Optionally, if described storage battery feedback backup switch disconnects, then the power subsystem charge control loop of described batteries still adopts former control circuit to control charging final pressure, and over-charge protective is cancelled; Otherwise the power subsystem of described batteries continue to described overcharge enable switch send overcharge enable switch severed finger order.
Compared with prior art; the present invention proposes a kind of lithium-ions battery group overcharge protection method of software and hardware combining of software and hardware combining; the method realized battery charge protection by software-controlled manner and hardware controls mode; and to overcome in prior art under single battery failure conditions without over-charge protective measure; the shortcoming that over-charge protective effect is bad; and simple possible of the present invention, be easy to Project Realization, improve reliability and the fail safe of satellite power system.
1) compared with prior art; the lithium-ions battery group overcharge protection method of a kind of software and hardware combining that the present invention proposes; situation for certain joint monomer fault is provided with feedback backup switch and charging Standby control circuit; to overcome in prior art without over-charge protective measure under single battery failure conditions, the shortcoming that over-charge protective effect is bad.
2) be provided with in power subsystem and overcharge enable switch, lost efficacy with the instruction path preventing storage battery from feeding back backup switch and caused storage battery to feed back the misoperation of backup switch, cause the whole star hidden danger that is not fully filled of lithium-ions battery in normal state.
Accompanying drawing explanation
Fig. 1 is batteries additives for overcharge protection system block diagram;
Fig. 2 is batteries overcharge protection method flow chart.
Embodiment
The present invention proposes a kind of lithium-ions battery group overcharge protection method of software and hardware combining, comprises providing overcharging enable switch, overcharges the monomer voltage that enable switch detects described storage battery, judge whether that monomer lost efficacy by described; If described monomer lost efficacy, then over-charge protective was carried out to described monomer; If described monomer did not lose efficacy, then cancelled the over-charge protective to described monomer.
Realized battery charge protection by comprehensive power subsystem software control mode and power-supply system hardware controls mode, accumulator super-charge protection, by comprehensive power subsystem failure judgement, by sending remote control command, power subsystem hardware is implemented.Simple possible, be easy to Project Realization, improve reliability and the fail safe of satellite power system.
Experience arranges single battery charging final pressure is by experiment 4.1V, suppose that n is lithium-ions battery serial number, then arranging battery charging final pressure under charging control circuit pattern is n*4.1V, and arranging battery charging final pressure under Standby control circuit-mode is (n-1) * 4.1V.
In example of the present invention power subsystem lithium-ions battery by 2 and 7 string lithium-ions battery monomers form.Control charging final pressure at about 28.7V by charging control circuit under batteries normal condition, when storage battery has certain joint monomer to lose efficacy, charge final pressure at about 24.6V by Standby control control circui.
Below with reference to drawings and Examples, the inventive method is described in further detail.
Be illustrated in figure 1 the over-charge protective system block diagram that the lithium-ions battery over-charge protective method of the software and hardware combining of one embodiment of the invention is corresponding, over-charge protective system by comprehensive power subsystem 001, overcharge enable switch 002, feedback backup switch 003, charging control circuit 004, Standby control circuit 005, charging circuit 006, accumulator battery voltage sample circuit 007, lithium-ions battery 008, single battery voltage sampling circuit 009 etc. form.
Wherein, concrete operation principle comprises: described comprehensive power subsystem 001 sends feedback backup switch 003 on/off instruction to power subsystem and overcharges the instruction of enable switch on/off and receive single battery voltage sampling signal; Overcharge enable switch 002 reception and overcharge the instruction of enable switch on/off, when overcharging enable switch 002 and connecting, feedback backup switch 003 can receive the instruction of feedback backup switch on/off; When feeding back backup switch 003 and turning off, charging control circuit 004, charging circuit 006 and battery tension sample circuit 007 form charge control loop, and the leading charging final pressure of charging control circuit 004 controls; When feeding back backup switch 003 and leading to, Standby control circuit 005, charging circuit 006 and battery tension sample circuit 007 form charge control loop, and Standby control circuit leading charging final pressure controls.
As shown in Figure 2, be the schematic flow sheet of the accumulator super-charge electric protection method of the software and hardware combining of one embodiment of the invention, it comprises the steps:
Perform step S1, gather single battery voltage.Gather single battery voltage by power subsystem single battery voltage sampling circuit and send into comprehensive power subsystem.
Perform step S2, judge whether that there is certain joint monomer voltage is less than 3.3V, when storage battery has certain joint monomer voltage lower than 3.3V, then perform step S3 to send out and overcharge enable switch and lead to instruction, namely described comprehensive power subsystem sends and overcharges enable switch to the enable switch that overcharges in power subsystem and lead to instruction.
Perform step S4, gather and overcharge enable switch quantity of state.And perform step S5, whether overcharge enable switch state described in judgement is 1.When comprehensive power subsystem detects that overcharging enable switch quantity of state is 1, represent that overcharging enable switch connects, then perform subsequent step S6; If not, then perform step S3, namely comprehensive power subsystem continues to send and overcharge enable switch to overcharging enable switch and lead to instruction.
After performing step S6, namely comprehensive power subsystem again receives and detects single battery voltage, then judge whether batteries exists certain joint monomer failure conditions, comprise execution step S11 and judge whether certain joint monomer voltage is less than 2.9V, and execution step S21 judges whether certain joint monomer voltage is greater than 3.3V.If have certain joint monomer voltage lower than 2.9V, then judge that batteries joint monomer lost efficacy; If have certain joint monomer voltage higher than 3.3V, then judge that batteries does not exist certain joint monomer failure conditions.
If the judgement performed after step S11 is that namely certain saves monomer voltage lower than in 2.9V situation, storage battery has certain joint monomer to lose efficacy, then perform step S12, send out storage battery feedback backup switch lead to instruction, namely described comprehensive power subsystem in power subsystem storage battery feedback backup switch send storage battery feedback backup switch lead to instruction.Perform step S13, gather storage battery feedback backup switch state, then perform step S14, judge whether feedback backup on off state is 1.When comprehensive power subsystem detects that storage battery feedback backup switch state is 1, represented that storage battery feedback backup switch was connected, power subsystem charge control loop switches to the control of Standby control circuit for final pressure of charging, and over-charge protective completes; Otherwise comprehensive power subsystem continues to send storage battery feedback backup switch to storage battery feedback backup switch leads to instruction.
Continue with reference to figure 2, if perform step S21, if certain joint monomer voltage is higher than 3.3V, then there is not monomer inefficacy in storage battery, then execution step S22 sends out and overcharges the order of enable severed finger.Namely comprehensive power subsystem sends overcharge the order of enable switch severed finger to the enable switch that overcharges in power subsystem, then performs step S23, gathers and overcharge enable switch quantity of state, and perform step S24 judge described in whether overcharge enable switch state be 0.When comprehensive power subsystem detects that overcharging enable switch quantity of state is 0, represent that overcharging enable switch disconnects, power subsystem charge control loop still adopts former control circuit to control charging final pressure, and over-charge protective is cancelled; Otherwise comprehensive power subsystem continues to overcharge the order of enable switch severed finger to overcharging enable switch transmission.
Although the present invention discloses as above, the present invention is not defined in this.Any those skilled in the art, without departing from the spirit and scope of the present invention, all can make various changes or modifications, and therefore protection scope of the present invention should be as the criterion with claim limited range.
Claims (10)
1. a batteries overcharge protection method for software and hardware combining, is characterized in that, comprises providing overcharging enable switch, overcharges the monomer voltage that enable switch detects described storage battery, judge whether that monomer lost efficacy by described; If described monomer lost efficacy, then over-charge protective was carried out to described monomer; If described monomer did not lose efficacy, then cancelled the over-charge protective to described monomer.
2. the batteries overcharge protection method of software and hardware combining as claimed in claim 1, is characterized in that, comprising:
Describedly judge whether monomer lost efficacy and also comprise: when storage battery exists monomer voltage lower than 3.3V, the described enable switch that overcharges is sent and overcharges enable switch and lead to instruction.
3. the batteries overcharge protection method of software and hardware combining as claimed in claim 2, is characterized in that, also comprise the quantity of state overcharging enable switch described in detection: if described in overcharge enable switch quantity of state when being 1, represent that overcharging enable switch connects; Otherwise continue to send and overcharge enable switch to the described enable switch that overcharges and lead to instruction.
4. the batteries overcharge protection method of software and hardware combining as claimed in claim 2, is characterized in that, described in overcharge after enable switch connects, detect described single battery voltage, judge whether described batteries exists certain joint cell failure conditions.
5. the batteries overcharge protection method of software and hardware combining as claimed in claim 4, is characterized in that, if the monomer voltage detected is lower than 2.9V, then judges that corresponding cell lost efficacy; If the monomer voltage detected is higher than 3.3V, then judge that corresponding cell did not lose efficacy.
6. the batteries overcharge protection method of software and hardware combining as claimed in claim 4; it is characterized in that; there is provided storage battery to feed back backup switch, lost efficacy if storage battery exists monomer, then send storage battery feedback backup switch and lead to instruction to described storage battery feedback backup switch.
7. the batteries overcharge protection method of software and hardware combining as claimed in claim 6; it is characterized in that; if described storage battery feedback backup switch is connected; then the power subsystem charge control loop of described batteries switches to the control of Standby control circuit for final pressure of charging of described batteries, and over-charge protective completes.
8. the batteries overcharge protection method of software and hardware combining as claimed in claim 6, is characterized in that, if when described storage battery feedback backup switch state is 1, then described storage battery feedback backup switch of crossing is connected; If when described storage battery feedback backup switch state is 0, then described storage battery feedback backup switch of crossing disconnects.
9. the batteries overcharge protection method of software and hardware combining as claimed in claim 4; it is characterized in that; comprise: provide storage battery to feed back backup switch, lost efficacy if storage battery does not exist monomer, then send the order of storage battery feedback backup switch severed finger to described storage battery feedback backup switch.
10. the batteries overcharge protection method of software and hardware combining as claimed in claim 6, it is characterized in that, if described storage battery feedback backup switch disconnects, then the power subsystem charge control loop of described batteries still adopts former control circuit to control charging final pressure, and over-charge protective is cancelled; Otherwise the power subsystem of described batteries continue to described overcharge enable switch send overcharge enable switch severed finger order.
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| CN201310408304.7A CN104426140B (en) | 2013-09-10 | 2013-09-10 | A kind of batteries overcharge protection method of software and hardware combining |
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| CN201310408304.7A CN104426140B (en) | 2013-09-10 | 2013-09-10 | A kind of batteries overcharge protection method of software and hardware combining |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201860130U (en) * | 2010-08-24 | 2011-06-08 | 扬州飞驰动力科技有限公司 | System for preventing cells from over-charging and over-discharging |
| CN102624050A (en) * | 2012-03-16 | 2012-08-01 | 成都宇能通能源开发有限公司 | Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack |
| CN102624058A (en) * | 2012-03-29 | 2012-08-01 | 中国科学院上海微系统与信息技术研究所 | Battery management system with fault battery isolation function and method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201860130U (en) * | 2010-08-24 | 2011-06-08 | 扬州飞驰动力科技有限公司 | System for preventing cells from over-charging and over-discharging |
| CN102624050A (en) * | 2012-03-16 | 2012-08-01 | 成都宇能通能源开发有限公司 | Battery management system capable of automatically shutting off unavailable units in serial-connection battery pack |
| CN102624058A (en) * | 2012-03-29 | 2012-08-01 | 中国科学院上海微系统与信息技术研究所 | Battery management system with fault battery isolation function and method |
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