CN106787016A - A kind of charging voltage autonomous method for handover control of spacecraft lithium battery - Google Patents

A kind of charging voltage autonomous method for handover control of spacecraft lithium battery Download PDF

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Publication number
CN106787016A
CN106787016A CN201710138006.9A CN201710138006A CN106787016A CN 106787016 A CN106787016 A CN 106787016A CN 201710138006 A CN201710138006 A CN 201710138006A CN 106787016 A CN106787016 A CN 106787016A
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slave computer
voltage
charging
switching
battery
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CN106787016B (en
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夏宁
杜青
蔡晓东
王超
刘治钢
李扬威
陈琦
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Beijing Institute of Spacecraft System Engineering
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Beijing Institute of Spacecraft System Engineering
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    • H02J7/0026
    • H02J7/0086
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0029Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
    • H02J7/00302Overcharge protection

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Secondary Cells (AREA)

Abstract

The invention discloses a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery, for part spacecraft bay section assembly state it is changeable, integration of equipments degree is high, in-orbit mission program and segmental arc are complicated the features such as, take the mode that software is controlled to realize that two bay sections are multiplexed the autonomous switching control of charging voltage of lithium-ions battery group by the slave computer of power-supply system.During in-orbit, lithium-ions battery monomer and group voltage are independently detected by slave computer, and compared with default monomer battery voltage threshold value, when there is failure in certain section cell, by the method from main modulation charging final pressure point voltage threshold, auto-changeover control of each bay section to battery charging final pressure is realized.The present invention improves the autonomous management ability of spacecraft power supply system, it is therefore prevented that lithium-ions battery group overcharge in the case of in-orbit monomer failure, so as to substantially increase the reliability of spacecraft power supply system.

Description

A kind of charging voltage autonomous method for handover control of spacecraft lithium battery
Technical field
The present invention relates to a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery, belong to space power system technology Field.
Background technology
Lithium-ions battery is compared as the secondary cell with Li+ inlaid schemes as positive and negative electrode active material with its own Many outstanding advantages such as energy is high, storage energy density is big, it is after ickel-cadmium cell, hydrogen nickel electricity to be increasingly becoming in space power system field Third generation space power system after pond.Currently, international lithium ion battery comes into engineering and answers in space power system field Use the stage.As a kind of secondary cell for being widely used in spatial overlay, its working condition directly affect spacecraft The rail flight life-span.Because the charge characteristic of lithium ion battery is more special, it is further continued for charging after its charging reaches final voltage If, will just cause overcharge.It is continuously embedded negative from the lithium ion of positive pole abjection during the overcharge of battery Pole, after the position that negative pole can accommodate lithium ion is all occupied full, subsequently the lithium ion from positive pole abjection have to be in negative terminal surface Deposition, as lithium metal, the Li dendrite that negative terminal surface is produced may puncture barrier film makes battery internal short-circuit.Overcharge can cause electric power storage Pond generates heat, and the thermal runaway caused by overcharge may be from two aspects:One side is the Joule heat that electric current flows through generation, another Aspect is the reaction heat that the side reaction that positive and negative electrode occurs is produced.During over-charging of battery, cathode voltage gradually rises, when taking off for positive pole When lithium amount is excessive, de- lithium process is also more and more difficult, and this causes the internal resistance of battery to be increased dramatically, therefore produces substantial amounts of joule Heat, becomes apparent when big multiplying power charges.The high-voltage anode oxidation solvent of overcharging state causes substantial amounts of heat to produce, temperature liter Negative pole also can occur exothermic reaction with electrolyte after height.When rate of heat dispation of the rate of heat release more than battery, temperature rises to necessarily During degree, thermal runaway will occur.It can be seen that overcharge will seriously damage lithium battery, to the electrical property and cycle life of battery Deng totally unfavorable.
In order to effectively extend the service life of lithium battery, the reliability of power-supply system, usual spacecraft power supply system are improved Lithium battery will be directed to and design different charging voltage gears.At present, in domestic spacecraft power supply system, lithium cell charging voltage Regulation be and realize that independence is relatively low and only for single bay section charging path by ground remote control.In-orbit period, work as spacecraft When outside TT & c arc, once due to single battery open circuit, short circuit, property abnormality decline drop etc. reason cause certain section monomer electricity Pond is failed, and accumulator battery voltage declines, and just impenetrably face sends the charging final pressure that telecommand switches batteries in time Point, so that continuing with charging voltage higher to battery charging, ultimately results in overcharge, to the feature of power-supply system Cause to have a strong impact on, the success or failure of whole spacecraft flight task are had influence on indirectly.
The content of the invention
Technology solve problem of the invention is:The deficiencies in the prior art are overcome, the invention provides a kind of spacecraft lithium electricity The autonomous method for handover control of charging voltage in pond, the voltage of batteries and body battery and automatic is independently detected by slave computer Switching control, improves the reliability that lithium battery overcharges protection, solves the problems, such as that traditional lithium battery autonomous management level is relatively low; By slave computer, hardware charging switching enables switch and charging voltage switches the cooperation for switching, and effectively prevents lithium battery from occurring Fill phenomenon, overcome traditional lithium battery overcharge protection excessively rely on ground control problem;Cut by being classified for different bay sections Control is changed, the service life of lithium battery is extended, traditional lithium battery overcharge protection circuit is compensate for and is only applicable to single bay section charging The defect of path.
Technical solution of the invention is:
A kind of autonomous method for handover control of charging voltage of spacecraft lithium battery, comprises the following steps:
The first step, using the first the next machine testing accumulator battery voltage and monomer battery voltage, when detecting any one section After cell failure, the first autonomous handover operation of bay section charging voltage is performed;
Second step, is charged with switching to enable to switch using the first slave computer priority the first hardware of transmission and leads to instruction, the first charging The logical instruction of voltage changeover switch, and set at the second bay section charging voltage switching to the second slave computer by several guard system host computers Reason notification flag;
3rd step, is charged with switching to enable to switch using the second slave computer priority the second hardware of transmission and leads to instruction, the second charging The logical instruction of voltage changeover switch.
In a kind of autonomous method for handover control of charging voltage of above-mentioned spacecraft lithium battery, in the first step, bag Include four step by step:
Step 1.1, receives accumulator battery voltage and monomer battery voltage sampled signal and detects storage using the first slave computer Battery voltage and monomer battery voltage;
Step 1.2, monomer battery voltage sum and accumulator battery voltage are compared, if both differ by more than 0.5V, Step 1.3 is then jumped to, if both are more or less the same in 0.5V, step 1.4 is jumped to;
Step 1.3, the first slave computer judges that battery tension telemetry-acquisition is abnormal, and accumulator battery voltage is more abnormal Mark position 1 simultaneously terminates;
Step 1.4, the first slave computer detects to the maximum and minimum value of all monomer battery voltages of batteries, Judge whether to meet monomer battery voltage minimum value less than monomer battery voltage lower threshold, and monomer battery voltage maximum is big In monomer battery voltage upper limit threshold, if so, second step is then carried out, if it is not, then jumping to step 1.1.
In a kind of autonomous method for handover control of charging voltage of above-mentioned spacecraft lithium battery, in the second step, bag Include four step by step:
Step 2.1, judges that whether the charging switching of the first bay section performs enabler flags position in permission using the first slave computer State, if so, step 2.2 is then jumped to, if it is not, then terminating;
Step 2.2, is first sent the first hardware and is charged with switching to enable to switch and lead to instruction, after time delay 10s using the first slave computer Retransmit the logical instruction of switching switch of the first charging voltage;
Step 2.3, the first slave computer passes through number guard system host computer and sets the second bay section charging voltage to the second slave computer Hand-off process notification flag;
First bay section is charged with switching and performs enabler flags position for illegal state by step 2.4, the first slave computer.
In a kind of autonomous method for handover control of charging voltage of above-mentioned spacecraft lithium battery, in the 3rd step, bag Include four step by step:
Step 3.1, judges that whether the charging switching of the second bay section performs enabler flags position in permission using the second slave computer State, if so, step 3.2 is then jumped to, if it is not, then terminating;
Step 3.2, is first sent the second hardware and is charged with switching to enable to switch and lead to instruction, after time delay 10s using the second slave computer Retransmit the logical instruction of switching switch of the second charging voltage;
Step 3.3, the second slave computer passes through number guard system host computer and feeds back the second bay section charging voltage to the first slave computer Hand-off process finishes mark and the second bay section charging voltage sets state;
Second bay section is charged with switching and performs enabler flags position for illegal state by step 3.4, the second slave computer.
In a kind of autonomous method for handover control of charging voltage of above-mentioned spacecraft lithium battery, the batteries include Some single batteries of serial or parallel connection.
Compared with the prior art, the invention has the advantages that:
【1】The present invention for part spacecraft multi cabin, integration of equipmentsization is high, the outer flight course of segmental arc is complicated the features such as, Realize that the charging voltage of two bay sections multiplexing lithium-ions battery group is autonomous by the way of software control by power-supply system slave computer Switching control, independence is high, applied widely.
【2】Slave computer of the present invention can independently detect accumulator battery voltage and monomer battery voltage, when any one section monomer When failure occurs in battery, by the method from main modulation charging final pressure point voltage threshold, the automatic switchover control of charging final pressure is realized System, prevents batteries from occurring overcharging phenomenon, improves the autonomous management ability of batteries.
【3】Logic smoothness of the present invention, clear thinking, reasonable in design, it is easy to Project Realization, lithium-ions battery overcharges guarantor Autonomous handoff procedure safety and stability is protected, the operating burden of staff is alleviated.
Brief description of the drawings
Fig. 1 is the overall flow figure of the autonomous switching control of charging voltage of the present invention
Fig. 2 is the particular flow sheet of the autonomous switching control of charging voltage of the present invention
Fig. 3 is schematic diagram of the invention
Wherein:1 first slave computer;2 second slave computers;3 first charging voltages switching switch;4 second charging voltages switch Switch;5 first hardware charge with switching and enable switch;6 second hardware charge with switching and enable switch;7 first host computers;On 8 second Position machine;V0Accumulator battery voltage;V00All monomer battery voltage sums;V1minMonomer battery voltage minimum value;V1maxCell Voltage max;V11Monomer battery voltage lower threshold;V22Monomer battery voltage upper limit threshold;
Specific embodiment
To make the solution of the present invention more understand, explanation and specific embodiment make further to the present invention below in conjunction with the accompanying drawings Description:
As shown in Fig. 1~2, a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery comprises the following steps:
The first step, detects accumulator battery voltage and monomer battery voltage, when detecting any one section using the first slave computer 1 After cell failure, the first autonomous handover operation of bay section charging voltage is performed;
Second step, the switching of charging of the first hardware is successively sent using the first slave computer 1 and is enabled the logical instruction of switch 5, first is filled The logical instruction of piezoelectric voltage switching switch 3, and cut to second bay section charging voltage of the setting of the second slave computer 2 by several guard system host computers Change treatment notification flag;
3rd step, the switching of charging of the second hardware is successively sent using the second slave computer 2 and is enabled the logical instruction of switch 6, second is filled The logical instruction of piezoelectric voltage switching switch 4;
In the first step, including four step by step:
Step 1.1, receives accumulator battery voltage and monomer battery voltage sampled signal and detects storage using the first slave computer 1 Battery voltage and monomer battery voltage;
Step 1.2, monomer battery voltage sum and accumulator battery voltage are compared, if both differ by more than 0.5V, Step 1.3 is then jumped to, if both are more or less the same in 0.5V, step 1.4 is jumped to;
Step 1.3, the first slave computer 1 judges that battery tension telemetry-acquisition is abnormal, and accumulator battery voltage is more different Normal mark position 1 simultaneously terminates;
Step 1.4, the first slave computer 1 is examined to the maximum and minimum value of all monomer battery voltages of batteries Survey, judge whether to meet monomer battery voltage minimum value less than monomer battery voltage lower threshold, and monomer battery voltage is maximum Value is more than monomer battery voltage upper limit threshold, if so, second step is then carried out, if it is not, then jumping to step 1.1.
In second step, including four step by step:
Step 2.1, judges that whether the charging switching of the first bay section performs enabler flags position in permission using the first slave computer 1 State, if so, step 2.2 is then jumped to, if it is not, then terminating;
Step 2.2, first sends the switching of charging of the first hardware and enables the logical instruction of switch 5, time delay 10s using the first slave computer 1 After retransmit the logical instruction of the first charging voltage switching switch 3;
Step 2.3, the first slave computer 1 sets the second bay section charging voltage and cuts by the first host computer 7 to the second slave computer 2 Change treatment notification flag;
First bay section is charged with switching and performs enabler flags position for illegal state by step 2.4, the first slave computer 1.
In 3rd step, including four step by step:
Step 3.1, judges that whether the charging switching of the second bay section performs enabler flags position in permission using the second slave computer 2 State, if so, step 3.2 is then jumped to, if it is not, then terminating;
Step 3.2, first sends the switching of charging of the second hardware and enables the logical instruction of switch 6, time delay 10s using the second slave computer 2 After retransmit the logical instruction of the second charging voltage switching switch 4;
Step 3.3, the second slave computer 2 feeds back the second bay section charging voltage and cuts by the second host computer 8 to the first slave computer 1 Change be disposed mark and the second bay section charging voltage setting state;
Second bay section is charged with switching and performs enabler flags position for illegal state by step 3.4, the second slave computer 2.
As shown in figure 3, the autonomous method for handover control of the charging voltage of spacecraft lithium battery is applied in the circuit of detector, Including the first slave computer 1, the second slave computer 2, the first charging voltage switching switch the 3, second charging voltage switching switch 4, first Hardware charges with switching and enables switch the 5, second hardware charging switching enable switch the 6, first host computer 7 and the second host computer 8;First Host computer 7 is connected with the first slave computer 1 by bus, and the circuit instruction output end of the first slave computer 1 connects the first charging respectively The hardware of voltage changeover switch 3 and first is charged with switching and enables switch 5, and the second host computer 8 and the second slave computer 2 are connected by bus Connect, the circuit instruction output end of the second slave computer 2 connects the second charging voltage switching switch 4 respectively and the second hardware charges and switches Switch 6 is enabled, the first host computer 7 is connected with the second host computer 8 by bus, led between the first slave computer 1 and the second slave computer 2 Cross the first host computer 7 and the second host computer 8 realizes communication, N monomer modes charging path and N-1 monomer modes charging path lead to Overcharge voltage switching switch is battery charging.
In the first bay section and the second bay section, it is respectively provided with the first hardware charging switching enable switch 5 and the second hardware fills TURP changes enable switch 6, to prevent charging voltage switching command misoperation from causing charging final pressure to switch extremely, causes batteries Cannot be full of.The switching of charging of first hardware enables the switching of charging of the hardware of switch 5 and second and enables switch and 6 be respectively at the first bay section On the control access instructed with the battery charging voltage switching of the second bay section, the first hardware charges with switching and enables 5 Hes of switch The state that the charging switching of second hardware enables switch 6 is made by the hardware charging switching of the first slave computer 1 and the second slave computer 2 respectively On/off instruction can be switched to be controlled, only charging with switching in the first hardware charging switching enable switch 5 or the second hardware enables Switch 6 is in the case of leading to, and corresponding first charging voltage switches the instruction that the charging voltage switching of switch 3 or second switchs 4 Can just be successfully transmitted.
First slave computer 1 can to the first hardware charge switching enable switch 5 send hardware charge switching enable switch it is logical/ Severed finger is made, and charging voltage switching command is sent to the first charging voltage switching switch 3.
Second slave computer 2 can to the second hardware charge switching enable switch 6 send hardware charge switching enable switch it is logical/ Severed finger is made, and charging voltage switching command is sent to the second charging voltage switching switch 4.
First slave computer 1 connects lithium-ions battery monomer and group voltage telemeering circuit of output terminal, receives lithium ion electric power storage Pond monomer and group voltage sampling signal, lithium-ions battery monomer voltage sum are compared with voltage telemeering is organized, according to comparing Result decides whether for accumulator battery voltage to compare abnormality mark position 1.
If lithium-ions battery group voltage comparative result is normal, it is zero, first that accumulator battery voltage compares abnormality mark position Slave computer 1 will continue the minimum value of lithium-ions battery monomer voltage and the maximum of monomer voltage and default cell Voltage upper and lower limit threshold value is compared, and is decided whether to send the instruction of battery charging voltage switching according to comparative result, and execution is filled Piezoelectric voltage handover operation.
In the present embodiment, spacecraft power supply system lithium-ions battery group is in parallel by two sections, the lithium ion of seven section series connection stores Battery cell is constituted.Lithium ion single cell voltage upper and lower limit threshold value sets as follows:
It is 4.3V to set lithium ion single battery voltage limit by experiment experience, and monomer battery voltage lower limit is 2.5V.
Result of the test:
When monomer battery voltage sum is compared with accumulator battery voltage, both are more or less the same in 0.5V, the first slave computer 1 Judge that battery tension telemetry-acquisition is normal.
When monomer battery voltage minimum value is less than 2.5V and monomer battery voltage maximum is more than 4.3V, the first slave computer 1 control first disconnects the first hardware and charges and switches enable switch 5, subsequently completes the first charging voltage switching 3, and the first bay section is filled It is illegal state that TURP changes execution enabler flags position, while being set at the second bay section charging voltage switching to the second slave computer 2 Reason notification flag.
Next, the second slave computer 2 controls first to disconnect the second hardware and charge to switch enable switch 6, subsequently complete second and fill Piezoelectric voltage switching 4, and it is illegal state that the charging switching of the second bay section is performed into enabler flags position, is fed back to the first slave computer 1 Second bay section charging voltage hand-off process finishes mark and the second bay section charging voltage sets state.
The content not described in detail in description of the invention is known to the skilled person technology.

Claims (5)

1. the autonomous method for handover control of charging voltage of a kind of spacecraft lithium battery, it is characterised in that:Comprise the following steps:
The first step, accumulator battery voltage and monomer battery voltage are detected using the first slave computer (1), and when detecting, any one section is single After body battery failure, the first autonomous handover operation of bay section charging voltage is performed;
Second step, the switching of charging of the first hardware is successively sent using the first slave computer (1) and is enabled the logical instruction of switch (5), first is filled Piezoelectric voltage switching switchs (3) logical instruction, and it is electric to be charged to the second slave computer (2) the second bay section of setting by several guard system host computers Pressure hand-off process notification flag;
3rd step, the switching of charging of the second hardware is successively sent using the second slave computer (2) and is enabled the logical instruction of switch (6), second is filled The logical instruction of piezoelectric voltage switching switch (4).
2. a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery according to claim 1, its feature exists In:In the first step, including four step by step:
Step 1.1, receives accumulator battery voltage and monomer battery voltage sampled signal and detects electric power storage using the first slave computer (1) Pond group voltage and monomer battery voltage;
Step 1.2, monomer battery voltage sum and accumulator battery voltage are compared, if both differ by more than 0.5V, are jumped Step 1.3 is gone to, if both are more or less the same in 0.5V, step 1.4 is jumped to;
Step 1.3, the first slave computer (1) judges that battery tension telemetry-acquisition is abnormal, and accumulator battery voltage is more abnormal Mark position 1 simultaneously terminates;
Step 1.4, the first slave computer (1) detects to the maximum and minimum value of all monomer battery voltages of batteries, Judge whether to meet monomer battery voltage minimum value less than monomer battery voltage lower threshold, and monomer battery voltage maximum is big In monomer battery voltage upper limit threshold, if so, second step is then carried out, if it is not, then jumping to step 1.1.
3. a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery according to claim 1, its feature exists In:In the second step, including four step by step:
Step 2.1, judges that whether the charging switching of the first bay section performs enabler flags position in permission shape using the first slave computer (1) State, if so, step 2.2 is then jumped to, if it is not, then terminating;
Step 2.2, first sends the switching of charging of the first hardware and enables the logical instruction of switch (5), time delay 10s using the first slave computer (1) After retransmit the logical instruction of the first charging voltage switching switch (3);
Step 2.3, the first slave computer (1) sets the second bay section charging electricity by several guard system host computers to the second slave computer (2) Pressure hand-off process notification flag;
First bay section is charged with switching and performs enabler flags position for illegal state by step 2.4, the first slave computer (1).
4. a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery according to claim 1, its feature exists In:In 3rd step, including four step by step:
Step 3.1, judges that whether the charging switching of the second bay section performs enabler flags position in permission shape using the second slave computer (2) State, if so, step 3.2 is then jumped to, if it is not, then terminating;
Step 3.2, first sends the switching of charging of the second hardware and enables the logical instruction of switch (6), time delay 10s using the second slave computer (2) After retransmit the logical instruction of the second charging voltage switching switch (4);
Step 3.3, the second slave computer (2) feeds back the second bay section charging electricity by several guard system host computers to the first slave computer (1) Crush-cutting changes be disposed mark and the second bay section charging voltage setting state;
Second bay section is charged with switching and performs enabler flags position for illegal state by step 3.4, the second slave computer (2).
5. a kind of autonomous method for handover control of charging voltage of spacecraft lithium battery according to claim 1, its feature exists In:The batteries include some single batteries of serial or parallel connection.
CN201710138006.9A 2017-03-09 2017-03-09 A kind of autonomous method for handover control of charging voltage of spacecraft lithium battery Active CN106787016B (en)

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CN108183513A (en) * 2017-11-28 2018-06-19 北京空间技术研制试验中心 A kind of construction method of spacecraft electric power system
CN110927595A (en) * 2019-12-17 2020-03-27 北京空间飞行器总体设计部 Ampere-hour meter electric quantity calculation method of spacecraft storage battery
CN111123130A (en) * 2019-12-25 2020-05-08 北京空间飞行器总体设计部 Satellite lithium ion battery voltage telemetering health on-orbit autonomous diagnosis method
CN112271765A (en) * 2020-09-28 2021-01-26 北京空间飞行器总体设计部 Overcharge protection method for lithium ion storage battery pack of spacecraft
CN113655389A (en) * 2020-05-12 2021-11-16 比亚迪股份有限公司 Method and system for diagnosing connection state of power circuit of battery pack, storage medium, battery management system and vehicle

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CN112271765B (en) * 2020-09-28 2022-08-05 北京空间飞行器总体设计部 Overcharge protection method for lithium ion storage battery pack of spacecraft

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