CN102842896B - Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof - Google Patents
Over-discharge protection control system for lithium ion storage battery and over-discharge protection method thereof Download PDFInfo
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Abstract
The invention discloses an over-discharge protection method for an over-discharge protection control system for a lithium ion storage battery, which is applied to a lunar probe power supply system. The over-discharge protection method comprises the following steps: a comprehensive electronic subsystem detects the voltage of a storage battery monomer, and switches a peak load off when discharge or fault of the storage battery monomer is detected; the comprehensive electronic subsystem continually detects the voltage of the storage battery monomer, judges whether the storage battery monomer is in a monomer over-discharge state or a monomer fault state, performs over-discharge protection on the storage battery monomer if the storage battery monomer is in the monomer over-discharge state, and clears the fault of the storage battery monomer if the storage battery monomer is in the monomer fault state; and during over-discharge protection for the storage battery monomer, a discharge switch is switched off, and an over-discharge protection circuit performs over-discharge protection on a hardware storage battery pack. The invention provides a storage battery monomer protection way and a storage battery pack protection way, a software control way is adopted during monomer over-discharge protection, a hardware control way is adopted during pack over-discharge protection, and two types of protection serve as backups for each other, so that the reliability and safety of a satellite power supply system are enhanced.
Description
Technical field
The present invention relates to a kind of battery Cross prevention method that is applicable to space flight power supply control technology field, be specifically related to a kind of lithium-ions battery Cross prevention control system and Cross prevention method that is applied to lunar orbiter power-supply system.
Background technology
Lithium-ions battery refers to using Li+ and embeds the secondary cell of compound 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 spacecrafts such as current satellite accumulation power supply used with lithium ion battery, accumulation power supply shared quality in power subsystem can be reduced to 10% ~ 15% by 30% ~ 40%, greatly reduce launch cost, increase payload.
Battery discharging, after final voltage, continues electric discharge and is called overdischarge.When lithium-ions battery overdischarge, the performance of negative pole can be received serious destruction, due to the too much lithium ion of deintercalation, when serious, can cause lattice to cave in, can cause the decomposition of the SEI film in negative terminal surface simultaneously, cause the SEI membrane structure of regeneration in charging process not fine and close, cause internal resistance to increase, also can consume active lithium, make volume lowering.But the reason that really causes battery failure is copper current collector to be corroded, and has produced copper ion, this also can increase the internal resistance of battery, in ensuing charge and discharge process, may form copper dendrite simultaneously, pierce through barrier film, cause internal short-circuit, thereby make battery failure.Visible overdischarge meeting grievous injury storage battery, electric property and cycle life to storage battery are totally unfavorable.
In order effectively to extend the useful life of lithium-ions battery, the fail safe that improves power subsystem, satellite power supply subsystem need to be taked the measure of anti-lithium-ions battery over conventionally.In domsat power-supply system, anti-lithium-ions battery over is taked hardware controls mode more at present; by over-discharge protection circuit, lithium-ions battery group voltage and batteries final discharging voltage are compared; when lithium-ions battery group sampled voltage is during lower than batteries final discharging voltage; discharge switch disconnects automatically, realizes lithium-ions battery group Cross prevention.But this Cross prevention mode is only crossed and is put row protection into for lithium-ions battery group, there is no the measure of single battery Cross prevention.If now a joint or more piece monomer occur that overdischarge causes monomer voltage too low; but batteries sampled voltage is still higher than batteries final discharging voltage; system is not taked Cross prevention; also can cause damage to single battery in this case, thereby single battery will have a strong impact on the effect of storage battery Cross prevention without Cross prevention measure.
The present invention proposes a kind of method that is applied to lunar orbiter power-supply system lithium-ions battery Cross prevention, and the method has realized the measure of following several lithium-ions battery Cross prevention by integrated electronics subsystem software control mode and power-supply controller of electric hardware controls mode:
1, single battery Cross prevention:
Detect single battery voltage by detector integrated electronics subsystem, in the time that storage battery has 1 joint monomer voltage lower than 3.3V, integrated electronics subsystem send instructions disconnect peak load make system works in minimum platform load, system continues to detect single battery voltage, if have two joint monomer voltages lower than 3.0V, think that storage battery is in over-discharge state, now integrated electronics subsystem is provided electric switch open command disconnection discharge switch, completes over;
2, batteries Cross prevention:
Integrated electronics subsystem discharge switch open command is the key of Cross prevention, if this instruction is failure to actuate, fault will cause Cross prevention to lose efficacy, now batteries Cross prevention is by generation effect, when accumulator battery voltage is lower than 17V, power-supply controller of electric over-discharge protection circuit disconnects controlled discharge switch, prevents that batteries from crossing the effect of putting thereby play;
3, single battery fault is got rid of:
In the time having 1 joint monomer voltage lower than 3.3V in integrated electronics subsystem detection single battery, storage battery is likely in 1 joint monomer malfunction.In the situation that storage battery has charging current, after disconnecting peak load, it is large that charging current will become, make to be increased to gradually 3.6V except external all the other of Trouble ticket 6 joint monomer voltages, and fault monomer is owing to can not filling electricity, monomer whose voltage can drop to below 3V, because adopting two joint monomer voltages, system just disconnects discharge switch lower than 3.0V, therefore do not take Cross prevention, to load normal power supply, ensure the supply of orbiter, orbital vehicle load energy by storage battery;
4, integrated electronics subsystem instruction malfunction is got rid of:
Power subsystem was also provided with puts enable switch, to prevent that the misoperation of integrated electronics subsystem discharge switch open command from causing the undesired disconnection of discharge switch, causes whole star power down fault.Cross and put enable switch state and send instructions and control by integrated electronics subsystem, only put enable switch logical in the situation that crossing, the discharge switch severed finger order that integrated electronics subsystem sends just can come into force, and has effectively prevented the generation of discharge switch open command misoperation.
Compared with prior art, a kind of method that is applied to lunar orbiter power-supply system lithium-ions battery Cross prevention that the present invention proposes, has overcome single battery without Cross prevention measure, the shortcoming that Cross prevention effect is bad.Simple possible of the present invention, be easy to Project Realization, can effectively prevent the generation of lithium-ions battery overdischarge phenomenon, well realized lithium-ions battery over, improved reliability and the fail safe of satellite power system.At present both at home and abroad without relevant paper or patent documentation.
Summary of the invention
The invention provides a kind of lithium-ions battery Cross prevention control system and Cross prevention method; the method has well realized lithium-ions battery over by integrated electronics subsystem software control mode and power-supply controller of electric hardware controls mode, has improved reliability and the fail safe of satellite power system.
For achieving the above object, the invention provides a kind of lithium-ions battery Cross prevention control system, be characterized in, it is applied to lunar orbiter power-supply system, and this lithium-ions battery Cross prevention control system comprises:
The lithium-ions battery group, discharge switch, peak load control switch and the peak load that are connected in series; Lithium-ions battery group comprises some single batteries connected in series or in parallel;
Minimum platform load, itself and peak load control switch and peak load are connected in parallel;
Cross and put enable switch, it sends discharge switch on/off control signal to discharge switch;
Integrated electronics subsystem, it receives the single battery voltage sampling signal of lithium-ions battery group output; And send the instruction of peak load on/off to peak load control switch; Putting enable switch to mistake sent and put the instruction of enable switch on/off and the instruction of discharge switch on/off; Send and put a switch on/off instruction to discharge switch;
Over-discharge protection circuit, it receives the batteries electric discharge final pressure of the accumulator battery voltage sampled signal of lithium-ions battery group output and the battery behavior decision of lithium-ions battery group; By comparing accumulator battery voltage sampled signal and batteries electric discharge final pressure, put enable switch to mistake and send the instruction of hardware discharge switch on/off.
Above-mentioned over-discharge protection circuit comprises three to be passed by and puts protected location circuit, and adopts three to get the two voting way of outputs and send the instructions of hardware discharge switch on/off.
Above-mentioned batteries electric discharge final pressure V2 is slightly less than n × V1, and wherein n is the serial number of single battery in lithium-ions battery group, and V1 is single battery electric discharge final pressure.
A Cross prevention method for lithium-ions battery Cross prevention control system, is characterized in, it is applied to lunar orbiter power-supply system, and this Cross prevention method comprises following steps:
Step 1, integrated electronics subsystem detect single battery voltage, in the time having detected that overdischarge or fault appear in single battery, disconnect peak load;
Step 1.1, integrated electronics subsystem receive single battery voltage sampling signal and detect single battery voltage;
Single battery reference voltage when step 1.2, integrated electronics subsystem judge whether joint monomer voltage lower than default disconnection or connect peak load, if so, jumps to step 1.3, if not, jumps to step 1.1; Wherein, the single battery reference voltage when disconnecting or connecting peak load is slightly larger than single battery electric discharge final pressure, and this single battery electric discharge final pressure determines according to the battery behavior of lithium-ions battery group;
Step 1.3, integrated electronics subsystem send the order of peak load severed finger to peak load control switch, disconnect peak load;
Step 1.4, integrated electronics subsystem are put enable switch to mistake and were sent and put the logical instruction of enable switch;
Step 1.5, integrated electronics subsystem judged whether be connection, if so, jump to step 2 if putting enable switch state, if not, jump to step 1.4;
Step 2, integrated electronics subsystem continue to detect single battery voltage, judge that single battery crosses the state of putting or monomer malfunction in monomer, if single battery crosses in monomer the state of putting, jump to step 3; If single battery, in monomer malfunction, jumps to step 4;
Step 3, integrated electronics subsystem are carried out single battery Cross prevention, judge discharge switch state, if discharge switch disconnects, Cross prevention completes, if discharge switch does not disconnect, jump to step 5;
Step 3.1, integrated electronics subsystem send the order of discharge switch severed finger to discharge switch;
Step 3.2, integrated electronics subsystem judge whether discharge switch state is for being disconnection, and if so, Cross prevention completes, and if not, jumps to step 5;
Step 4, integrated electronics subsystem are carried out the eliminating of single battery fault;
Step 4.1, integrated electronics subsystem are put enable switch to mistake and were sent and put the order of enable switch severed finger;
Step 4.2, integrated electronics subsystem judged whether be disconnection, if so, jump to step 4.3 if putting enable switch state, if not, jump to step 4.1;
Step 4.3, integrated electronics subsystem send the logical instruction of peak load to peak load control switch simultaneously, connect peak load;
Step 4.4, integrated electronics subsystem detect single battery voltage, whether the single battery voltage of judgement and monomer series-connected all the other single batteries of trouble accumulator the single battery reference voltage higher than default disconnection or while connecting peak load, if, system is recovered normal operating conditions, if not, jump to step 1.3;
Step 5, over-discharge protection circuit carry out hardware batteries Cross prevention.
Step 5.1, over-discharge protection circuit receive accumulator battery voltage sampled signal and judge that accumulator battery voltage, whether lower than batteries electric discharge final pressure, if so, jumps to step 5.2, if not, discharge switch conducting, system is normally worked; Wherein batteries electric discharge final pressure determines according to the battery behavior of lithium-ions battery group;
Step 5.2, over-discharge protection circuit are put enable switch to mistake and are sent the order of hardware discharge switch severed finger; owing to now crossing and putting enable switch in conducting state; cross and put enable switch to the disconnected control signal of discharge switch transmission discharge switch, discharge switch is disconnected, complete Cross prevention.
Lithium-ions battery Cross prevention control system of the present invention and Cross prevention method are compared to the prior art, its advantage is, a kind of method that is applied to lunar orbiter power-supply system lithium-ions battery Cross prevention that the present invention proposes, adopt software control mode to realize single battery Cross prevention by integrated electronics subsystem, overcome single battery without Cross prevention measure, the shortcoming that Cross prevention effect is bad;
When integrated electronics subsystem discharge switch open command of the present invention is failure to actuate fault, disconnected by power-supply controller of electric over-discharge protection circuit controlled discharge switch, prevent that batteries from crossing the effect of putting thereby play.This hardware protection effectively prevented integrated electronics subsystem discharge switch open command be failure to actuate fault cause Cross prevention lost efficacy;
In power subsystem of the present invention, be provided with and put enable switch, to prevent that the misoperation of integrated electronics subsystem discharge switch open command from causing the undesired disconnection of discharge switch, causes whole star power down fault;
Lithium-ions battery Cross prevention of the present invention has single battery protection and two kinds of approach of batteries protection, monomer Cross prevention adopts software control mode by integrated electronics subsystem, group Cross prevention adopts hardware controls mode by power-supply controller of electric, two kinds of protections backup each other, and have improved reliability and the fail safe of satellite power system;
Simple possible of the present invention, be easy to Project Realization.
Brief description of the drawings
Fig. 1 is the system block diagram of lithium-ions battery Cross prevention control system of the present invention;
Fig. 2 is the circuit diagram of the over-discharge protection circuit of lithium-ions battery Cross prevention control system of the present invention;
Fig. 3 is the method flow diagram of the Cross prevention method of lithium-ions battery Cross prevention control system of the present invention.
Embodiment
Below in conjunction with accompanying drawing, further illustrate specific embodiments of the invention.
As shown in Figure 1; the present invention discloses a kind of lithium-ions battery Cross prevention control system that is applied to lunar orbiter power-supply system; this lithium-ions battery Cross prevention control system comprises the lithium-ions battery group 2, discharge switch 7, peak load control switch 8 and the peak load 3 that are connected in series, and this is applied to lunar orbiter power-supply system and also comprises minimum platform load 4, crosses and put enable switch 6, integrated electronics subsystem 1 and over-discharge protection circuit 5.
Lithium-ions battery group 2 comprises some single batteries connected in series or in parallel, and in this real-time example, lithium-ions battery group 2 is formed by 14 joint lithium-ions battery monomers 2 and 7 strings.
Minimum platform load 4 is connected in parallel with peak load control switch 8 and peak load 3.
Cross circuit of output terminal connection discharge switch 7 inputs of putting enable switch 6, send discharge switch on/off control signal to discharge switch 7.
Native system was provided with puts enable switch 6, to prevent that the misoperation of integrated electronics subsystem discharge switch open command from causing the undesired disconnection of discharge switch, causes whole star power down fault.Cross and put enable switch state and cross and put the instruction of enable switch on/off and control by integrated electronics subsystem; when integrated electronics subsystem is sent out the order of peak load severed finger; sent out and put the logical instruction of enable switch; hardware protection circuit is come into force, effectively prevented the generation of discharge switch open command misoperation.
Integrated electronics subsystem 1 inlet circuit connects lithium-ions battery group 2, receives the single battery voltage sampling signal that lithium-ions battery group 2 is exported.Integrated electronics subsystem 1 output respectively circuit connects peak value load control switch 8, crosses and put enable switch 6, discharge switch 7, sends the instruction of peak load on/off to peak load control switch 8; Putting enable switch 6 to mistake sent and put the instruction of enable switch on/off and the instruction of discharge switch on/off; Send and put a switch on/off instruction to discharge switch 7.
Over-discharge protection circuit 5 inlet circuits connect lithium-ions battery group 2; the batteries electric discharge final pressure that the accumulator battery voltage sampled signal that reception lithium-ions battery group 2 is exported and the battery behavior of lithium-ions battery group 2 determine; by comparing accumulator battery voltage sampled signal and batteries electric discharge final pressure, put enable switch 6 to mistake and send the instruction of hardware discharge switch on/off.
Cross and put enable switch 6, over-discharge protection circuit 5, discharge switch 7 and lithium-ions battery group 2 and form power subsystem 9.
In the present embodiment, lithium-ions battery final voltage arranges as follows: in the inventive example, lunar orbiter power subsystem lithium-ions battery group 2 is by the lithium-ions battery monomer composition of two and seven strings.The single battery electric discharge final pressure of lithium-ions battery group 2 is set is 3.0V to experience by experiment, the batteries electric discharge final pressure V2 that lithium-ions battery 2 is set is slightly less than n × V1, V1 is single battery electric discharge final pressure, be n × 3.0V, n is the serial number of single battery in lithium-ions battery group 2, and in the present embodiment, batteries electric discharge final pressure is made as 17V.Meanwhile, the single battery reference voltage arranging when disconnecting or connecting peak load is slightly larger than single battery electric discharge final pressure, is 3.3V.The single battery reference voltage arranging while putting enable switch disconnection is slightly larger than the single battery reference voltage while connecting peak load, is 3.6V.
Over-discharge protection circuit 5 comprises three to be passed by and puts protected location circuit, and adopts three to get the two voting way of outputs and send the instructions of hardware discharge switch on/off.
As shown in Figure 2, be power-supply controller of electric over-discharge protection circuit schematic diagram.Accumulator battery voltage sampled signal and batteries electric discharge final pressure, input comparator L1, comparator L2, comparator L3 compare respectively, when accumulator battery voltage sampled signal is discharged final pressure lower than batteries (accumulator battery voltage is lower than 17V), comparator output high level makes triode conducting, while having the equal conducting of two-way in the circuit of Dang San road, discharge switch on/off hardware controls signal is high level, and this high level disconnects discharge switch, prevents that batteries from crossing the effect of putting thereby play.Otherwise, in the time that accumulator battery voltage sampled signal is discharged final pressure higher than mistake batteries (organizing voltage lower than 17V), discharge switch conducting, system is normally worked.
As shown in Figure 3, the present invention discloses a kind of Cross prevention method of the lithium-ions battery Cross prevention control system that is applied to lunar orbiter power-supply system.Lithium-ions battery Cross prevention has monomer protection and two kinds of approach of group protection; single battery Cross prevention adopts software control mode by integrated electronics subsystem; batteries Cross prevention adopts hardware controls mode by power-supply controller of electric, and two kinds of protections backup each other.
This Cross prevention method comprises following steps:
Step 1, integrated electronics subsystem 1 detect single battery voltage, in the time having detected that overdischarge or fault appear in single battery, disconnect peak load 3.
Step 1.1, integrated electronics subsystem 1 receive single battery voltage sampling signal and detect single battery voltage.
Single battery reference voltage 3.3V when step 1.2, integrated electronics subsystem 1 judge whether joint monomer voltage lower than default disconnection or connect peak load, if, show that lithium-ions battery group 2 has 1 joint single battery outlet overdischarge or two kinds of situations of fault, jump to step 1.3, if not, jump to step 1.1.Wherein, the single battery reference voltage when disconnecting or connecting peak load is slightly larger than single battery electric discharge final pressure 3V, and this single battery electric discharge final pressure determines according to the battery behavior of lithium-ions battery group 2.
Step 1.3, integrated electronics subsystem 1 send the order of peak load severed finger to peak load control switch 8, disconnect peak load 3, make lunar orbiter system works in minimum platform load.
Step 1.4, integrated electronics subsystem 1 put enable switch 6 to mistakes simultaneously and sent and put enable switch and lead to instruction.
Step 1.5, integrated electronics subsystem 1 judged whether be communicated with (cross put enable switch 6 states be 1), if so, jump to step 2 if putting enable switch 6 states, if not, jump to step 1.4.
Step 2, integrated electronics subsystem 1 continue to detect single battery voltage, judge that single battery crosses the state of putting or monomer malfunction in monomer, if have 2 joint monomer voltages lower than single battery electric discharge final pressure 3.0V, single battery crosses in single battery the state of putting, and jumps to step 3; If the single battery reference voltage 3.6V while having 6 joint single battery voltages to put enable switch disconnection higher than mistake, shows that single battery, in monomer malfunction, jumps to step 4.Herein 6 joint single batteries be in lithium-ions battery group 2 with 6 single batteries that break down or a single battery of overdischarge is connected in series.
Step 3, cross at storage battery under the situation of putting, each monomer voltage all declines, if storage battery has two joint monomer voltages lower than 3.0V, thinks that storage battery is in over-discharge state, and if not, redirect is returned step 2 and proceeded the judgement of single battery voltage.
Integrated electronics subsystem 1 is carried out single battery Cross prevention, judges discharge switch state, if discharge switch 7 has disconnected, Cross prevention completes, if discharge switch 7 does not disconnect, jumps to step 5.
Step 3.1, integrated electronics subsystem 1 send the order of discharge switch severed finger to discharge switch 7.
Step 3.2, integrated electronics subsystem 1 judge whether discharge switch 7 states are for being to disconnect (being that discharge switch 7 states are 0), and if so, Cross prevention completes, and if not, jumps to step 5.
Step 4, under the situation of 1 joint single battery fault, disconnecting peak load can make charged electrical rheology large, in the situation that storage battery has charging current, all the other 6 joint monomer voltages external except Trouble ticket can be increased to 3.6V gradually, and fault monomer is owing to can not filling electricity, monomer voltage can drop to below 3.0V, now storage battery is in 1 joint monomer malfunction, because being set to two joint monomer voltages, system just disconnects discharge switch lower than 3.0V, therefore do not take Cross prevention, powered to the load by all the other 6 joint cell batteries, ensure the supply of lunar orbiter load energy.If not above-mentioned situation, redirect is returned step 2 and is proceeded the judgement of single battery voltage.
Integrated electronics subsystem 1 is carried out the eliminating of single battery fault.
Step 4.1, integrated electronics subsystem 1 are put enable switch 6 to mistake and were sent and put the order of enable switch severed finger.
Step 4.2, integrated electronics subsystem 1 judged whether be disconnect (cross put enable switch 6 states be 0), if so, jump to step 4.3 if putting enable switch 6 states, if not, jump to step 4.1.
Step 4.3, integrated electronics subsystem 1 send the logical instruction of peak load 3 to peak load control switch 8 simultaneously, connect peak load 3.
Step 4.4, integrated electronics subsystem 1 detect single battery voltage, whether the single battery voltage of judgement and monomer series-connected all the other of trouble accumulator 6 joint single batteries the single battery reference voltage 3.3V higher than default disconnection or while connecting peak load, if, system is recovered normal operating conditions, if not, jump to step 1.3.
Step 5, over-discharge protection circuit 5 carry out hardware batteries Cross prevention.
Step 5.1, over-discharge protection circuit 5 receive accumulator battery voltage sampled signal and judge that accumulator battery voltage, whether lower than batteries electric discharge final pressure, if so, jumps to step 5.2, if not, discharge switch 7 conductings, system is normally worked; Wherein batteries electric discharge final pressure determines according to the battery behavior of lithium-ions battery group 2;
Step 5.2, over-discharge protection circuit 5 are put enable switch 6 to mistake and are sent the order of hardware discharge switch severed finger; owing to now crossing and putting enable switch 6 in conducting state; cross and put enable switch and send the disconnected control signal of discharge switch 7 to discharge switch 7, discharge switch 7 is disconnected, complete Cross prevention.
In the present embodiment; over-discharge protection circuit 5 specific works principles are as follows: input comparator L1, L2, L3 compare respectively for accumulator battery voltage sampled signal and batteries electric discharge final pressure; when accumulator battery voltage sampled signal is discharged final pressure lower than batteries (accumulator battery voltage is lower than 17V); comparator output high level makes triode conducting; in the time having 2 road equal conducting in 3 road circuit; the instruction of hardware discharge switch on/off is high level; this high level disconnects discharge switch, prevents that batteries from crossing the effect of putting thereby play.This hardware protection effectively prevented integrated electronics subsystem discharge switch open command be failure to actuate fault cause Cross prevention lost efficacy.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (4)
1. a Cross prevention method for lithium-ions battery Cross prevention control system, is characterized in that, it is applied to lunar orbiter power-supply system, and this Cross prevention method comprises following steps:
Step 1, integrated electronics subsystem (1) detect single battery voltage, in the time having detected that overdischarge or fault appear in single battery, disconnect peak load (3);
Step 1.1, integrated electronics subsystem (1) receive single battery voltage sampling signal and detect single battery voltage;
Single battery reference voltage when step 1.2, integrated electronics subsystem (1) judge whether joint monomer voltage lower than default disconnection or connect peak load, if so, jumps to step 1.3, if not, jumps to step 1.1; Wherein, the single battery reference voltage when disconnecting or connecting peak load is slightly larger than single battery electric discharge final pressure, and this single battery electric discharge final pressure determines according to the battery behavior of lithium-ions battery group (2);
Step 1.3, integrated electronics subsystem (1) send the order of peak load severed finger to peak load control switch (8), disconnect peak load (3);
Step 1.4, integrated electronics subsystem (1) are put enable switch (6) to mistake and were sent and put the logical instruction of enable switch;
Step 1.5, integrated electronics subsystem (1) judged whether be connection, if so, jump to step 2 if putting enable switch (6) state, if not, jump to step 1.4;
Step 2, integrated electronics subsystem (1) continue to detect single battery voltage, judge that single battery crosses the state of putting or monomer malfunction in monomer, if single battery crosses in monomer the state of putting, jump to step 3; If single battery, in monomer malfunction, jumps to step 4;
Step 3, integrated electronics subsystem (1) are carried out single battery Cross prevention, judge discharge switch state, if discharge switch (7) disconnects, Cross prevention completes, if discharge switch (7) does not disconnect, jump to step 5;
Step 4, integrated electronics subsystem (1) are carried out the eliminating of single battery fault;
Step 5, over-discharge protection circuit (5) carry out hardware batteries Cross prevention.
2. the Cross prevention method of lithium-ions battery Cross prevention control system as claimed in claim 1, is characterized in that, described step 3 comprises following steps:
Step 3.1, integrated electronics subsystem (1) send the order of discharge switch severed finger to discharge switch (7);
Step 3.2, integrated electronics subsystem (1) judge whether discharge switch (7) state is for being disconnection, and if so, Cross prevention completes, and if not, jumps to step 5.
3. the Cross prevention method of lithium-ions battery Cross prevention control system as claimed in claim 1, is characterized in that, described step 4 comprises following steps:
Step 4.1, integrated electronics subsystem (1) are put enable switch (6) to mistake and were sent and put the order of enable switch severed finger;
Step 4.2, integrated electronics subsystem (1) judged whether be disconnection, if so, jump to step 4.3 if putting enable switch (6) state, if not, jump to step 4.1;
Step 4.3, integrated electronics subsystem (1) send the logical instruction of peak load (3) to peak load control switch (8) simultaneously, connect peak load (3);
Step 4.4, integrated electronics subsystem (1) detect single battery voltage, whether the single battery voltage of judgement and monomer series-connected all the other single batteries of trouble accumulator the single battery reference voltage higher than default disconnection or while connecting peak load, if, system is recovered normal operating conditions, if not, jump to step 1.3.
4. the Cross prevention method of lithium-ions battery Cross prevention control system as claimed in claim 1, is characterized in that, described step 5 comprises following steps:
Step 5.1, over-discharge protection circuit (5) receive accumulator battery voltage sampled signal and judge that accumulator battery voltage, whether lower than batteries electric discharge final pressure, if so, jumps to step 5.2, if not, discharge switch (7) conducting, system is normally worked; Wherein batteries electric discharge final pressure determines according to the battery behavior of lithium-ions battery group (2);
Step 5.2, over-discharge protection circuit (5) are put enable switch (6) to mistake and are sent the order of hardware discharge switch severed finger; owing to now crossing and putting enable switch (6) in conducting state; cross and put enable switch to the disconnected control signal of discharge switch (7) transmission discharge switch (7); discharge switch (7) is disconnected, complete Cross prevention.
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| CN113511108B (en) * | 2020-04-09 | 2024-09-06 | 宁德时代新能源科技股份有限公司 | Control circuit, method and system |
| CN113671402B (en) * | 2021-08-18 | 2024-02-09 | 上海卫星工程研究所 | Fault detection method for lithium ion storage battery pack of deep space detector |
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| JP5083588B2 (en) * | 2006-03-31 | 2012-11-28 | 日立工機株式会社 | Lithium battery pack |
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| CN2922234Y (en) * | 2006-06-08 | 2007-07-11 | 潍坊光华电池有限公司 | Over-discharge protecting circuit for power lithium ion cell |
| CN201466159U (en) * | 2007-10-15 | 2010-05-12 | 布莱克和戴克公司 | Battery charger, battery system and electric tool system |
| CN102638081A (en) * | 2012-05-04 | 2012-08-15 | 天津凌可机电设计有限公司 | Smart matrix battery charging-discharging managing system and managing method |
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