CN104167775A - Charging and discharging balance method for battery pack - Google Patents
Charging and discharging balance method for battery pack Download PDFInfo
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- CN104167775A CN104167775A CN201410350148.8A CN201410350148A CN104167775A CN 104167775 A CN104167775 A CN 104167775A CN 201410350148 A CN201410350148 A CN 201410350148A CN 104167775 A CN104167775 A CN 104167775A
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Abstract
Disclosed is a charging and discharging balance method for a battery pack. Steps of the method are as follows: 1. that a computing unit is in a battery replacement mode is confirmed; 2. a detection unit acquires and outputs voltages of single batteries at a ti time; 3. an estimation unit refers to voltage information input by the step 2 to obtain and output electricity estimation values Qi of the single batteries; 4. a prediction unit uses the Qi input by the step3 to analyze electricity change so that electricity prediction values Q*<i+1> at a ti+1 time are obtained; 5. a system stores the Qi; 6. the prediction unit outputs the electricity prediction values Q*<i+1> at the ti+1 time and a mean value thereof; 7. a low (high)-electricity single battery is searched for and step 10 is entered if a target is found or else a target single battery s is recorded and step 8 is entered; 8. the computation unit searches for electricity estimation values of the remaining single batteries which do not supply power in a power supply system and a replacement single battery r is found out and information of the r and the s and replacement information of the r and s are output; 9. a control unit reads the replacement information of the r and the s so that replacement of the r and the s is completed; 10. after a ti+1 time is reached from a ti time through a Delta t, the above steps are repeated, the ti+1 time being a starting point.
Description
Technical field
The invention provides a kind of battery set charge/discharge balance method, relating to one can carry out dynamic replacement to battery in battery pack monomer, realizes the circuit that each battery cell balance discharges and recharges, and belongs to battery-powered using electricity system technical field.
Background technology
Now, used in a large number in productive life with battery-powered using electricity system.Supplying cell group is generally the combination of multiple battery cells.In order to realize at low cost the balance of each battery discharge in battery pack group, corresponding power-supply system technology is urgently improved.
Conventionally, be combined into multiple battery cells of battery pack, owing to being subject to the impact of battery manufacturing process and other production differences, the speed that discharges and recharges in battery pack has difference, thereby causes battery pack to occur short-board effect, and the Acceptable life of battery pack is reduced.In engineering, can adopt and discharge and recharge balanced measure and solve this problem, but also there is electric energy loss in traditional balance method that discharges and recharges in discharging and recharging, as passed through conductive discharge, or by giving electric discharge too fast battery cell charging, all can make system effectiveness decrease.Providing also of multiple power supplies output generally need realize plurality of voltages output by extra voltage conversion device, and this has not only increased equipment cost, has also reduced system effectiveness and reliability, makes the maintenance difficulty relative to unified management of system.
Summary of the invention
(1) goal of the invention: the present invention is directed to the problem that battery pack exists in actual applications, a kind of battery set charge/discharge balance method has been proposed, by the combining form of battery cell in system is innovated, can solve the power supply equilibrium problem of each battery cell in using electricity system.
The method is also supported the multichannel output of power supply, avoids using voltage transitions facility, is conducive to optimize whole using electricity system.
(2) technical scheme thinking
N battery cell of power-supply system configuration also replaces by battery that to realize in battery set charge/discharge balance sysmte battery cell number n satisfied:
can be first in system, not yet connect and in the battery of power supply, choose electric weight difference and be less than a certain threshold value
a Battery pack monomer, combination after be system power supply.By interval of delta t sometime, the electric quantity data of supplying cell monomer measured and upgraded, when the charge value of certain battery cell in this Circuits System of access and the difference of the average electrical value of battery in battery pack are greater than another threshold value Q
m2time, more never connecting the battery of choosing the battery condition that satisfies condition in the battery cell of powering, its break-make to inductive switch in control switch matrix, replaces original low (height) electric weight battery, thereby ensures the confession electric equilibrium of system battery group.In the time that too high and another battery cell electric weight of the electric weight of certain battery cell in system is too low, also the two all can be replaced, then connect into charge-discharge circuit, the state of charge of each battery cell is all tended to balance.
The break-make of respective switch in control switch matrix, can obtain multiple power supplies output easily.
(2) technical scheme flow process
The present invention mainly provides the implementation method method of battery set charge/discharge balance, described battery set charge/discharge balance method for electrically, its basic function module comprises battery voltage detection unit 100 (being called for short ' detecting unit '), battery electric quantity evaluation unit 200 (being called for short ' evaluation unit '), Capacity Predication of Battery based unit 300 (being called for short ' predicting unit '), battery combination computing unit 400 (being called for short ' computing unit '), switch matrix control unit 500 (being called for short ' control unit ').Also comprise in addition an Executive Module: switch matrix.Battery voltage detection unit 100 is for gathering the current output voltage of each battery cell that connects power supply.Battery electric quantity evaluation unit 200 is for estimating the current electric quantity of the each battery cell that connects power supply.Capacity Predication of Battery based unit 300 for assessment of with the situation that is connected each battery power consumption of powering in prediction supplying cell group.Battery combination computing unit 400, for determining the compound mode of battery cell, has two kinds of mode of operations of " replacement battery " and " integrated drive generator "." replacement battery " pattern is used for realizing battery set charge/discharge balance, needs low (height) the electric weight battery being replaced and be used as the battery of replacing under this pattern in the definite supplying cell group of battery combination computing unit 400; " integrated drive generator " pattern is for realizing the multichannel output of power supply, under this pattern, battery combination computing unit 400 is identified the voltage requirements information of user's input, in frame of reference, do not connect the electric weight situation of the battery cell of power supply, determine the compound mode of multiple battery pack.Switch matrix control unit 500 is by the requirement of battery combination, and the break-make of respective switch in control switch matrix, exports thereby obtain corresponding power supply, and this module also can be identified the manually power source combination information of input of user, generates dependent instruction.Switch matrix, for carrying out the instruction of switch matrix control unit 500, mainly completes by the break-make of a series of switches.
The invention provides a kind of battery set charge/discharge balance method, it is as follows that it realizes the concrete steps that in battery pack, battery equilibrium discharges and recharges:
Step 1: confirm that battery combination computing unit 400 is under " replacement battery " pattern;
Step 2: t is put in battery voltage detection unit 100 sometime
i(this supplying cell monomer number is m, and battery cell total number output voltage n) in m< power-supply system, and is input to battery electric quantity evaluation unit 200 to obtain each supplying cell monomer in battery pack;
Step 3: battery electric quantity evaluation unit (200) receives the information of voltage of input, and the battery performance of storing in conjunction with self, estimate the electric weight of each battery cell in supplying cell group, and by its current electric quantity estimated value
be input to Capacity Predication of Battery based unit (300);
Step 4: the electric weight estimated value that Capacity Predication of Battery based unit 300 utilizes battery electric quantity evaluation unit 200 to input, and obtain current circuit total current by current sensor, and a upper moment t in system storage
i-1the electric weight relevant information of each battery cell in supplying cell group, assesses the electric quantity change trend of these battery cells, next moment t of each battery cell in prediction supplying cell group
i+1power quantity predicting value
Step 5: system storage upgrades the electric weight estimated value Q of each battery cell in supplying cell group (being current connection power supply)
i, with t
ithe electric weight estimated value in moment is as up-to-date storage data;
Step 6: Capacity Predication of Battery based unit 300 by each battery in supplying cell group at t
i+1the power quantity predicting value in moment
and mean value
be input to battery combination computing unit 400;
Step 7: the power quantity predicting value of battery combination computing unit 400 comparative analysis inputs
and mean value
find low (height) electric weight battery cell, if find, target enters step 10; Otherwise record object battery cell s, enters step 8;
Step 8: battery combination computing unit 400 reference input information, all the other electric weight estimated values of supplying cell monomer (number is n-m) not in search power-supply system, find out as the battery cell r replacing, the battery mark of r and s and the replacement information of the two are outputed to switch matrix control unit 500;
Step 9: switch matrix control unit 500 reads the information of r and the replacement of s battery from input signal, and navigates to respective switch in switch matrix according to associated batteries label, changes the on off operating mode of respective switch, completes the replacement of battery cell; The status identifier of the battery that participation is replaced in system storage changes simultaneously, and this status identifier is whether to be linked into circuit for identifying battery;
Step 10: from time point t
igo through time history Δ t and arrive t
i+1after, with time t
i+1for starting point repeats above step.
The flow chart of the method for the invention as shown in Figure 1.
Wherein, at " confirming that battery combination computing unit 400 is under ' replacement battery ' pattern " described in step 1, should " replacement battery " pattern refer to the operating state that power-supply system is given tacit consent to.
Wherein, " the time point t of indication in step 2
i" and next time point t
i+1between time interval Δ t can be preset by user.
Wherein, described in step 2 " t is put in battery voltage detection unit 100 sometime
i(this supplying cell monomer number is m to obtain each supplying cell monomer in battery pack, and battery cell total number output voltage n) in m< power-supply system, and be input to battery electric quantity evaluation unit 200 ", its method of obtaining is to realize by the voltage sensor in the each battery cell two ends configuration that connects power supply.
Wherein, in step 2, three, four, five, six, seven, the battery cell of powering to liking connection of operation, ignores these steps to not connecting the battery cell of power supply; Do not connect power supply and in the time storing, have specific diacritics with the each battery cell that is connected power supply.
Wherein, " system storage " relating in step 4, right
individual battery cell all has distribute data memory space.
Wherein, at " the electric weight estimated value Q of each battery cell in system storage renewal supplying cell group (being current connection power supply) described in step 5
i, with t
ithe electric weight estimated value in moment is as up-to-date storage data ", this system storage more principle of new data is: to connecting the battery cell of power supply, what read is the last data of measuring before upgrading; To the current battery that does not connect power supply, read the information while connection last time, what power storage if never connect is initial information.
Wherein, in " the power quantity predicting value of battery combination computing unit 400 comparative analysis inputs described in step 7
and mean value
find low (height) electric weight battery cell ", determine with following method: will connect the power quantity predicting value of the battery cell j powering
average electricity predicted value with place battery cell
relatively, when the two difference is greater than a certain threshold value
time, determine that j is low (height) electric weight battery.
Wherein, in " battery combination computing unit 400 reference input information; all the other electric weight estimated values of supplying cell monomer (number is n-m) not in search power-supply system " described in step 8, should " all the other in power-supply system not the electric weight estimated value of supplying cell monomer (number is n-m) ", be that respective battery monomer upgrades while accessing last time, from system storage, read.
Wherein, described in step 8 " in " the battery combination computing unit 400 reference input information described in step 8, all the other electric weight estimated values of supplying cell monomer (number is n-m) not in search power-supply system, find out as the battery cell r replacing ", be somebody's turn to do " find out as the battery cell r replacing " and realize with following method: never connect in the battery cell of powering and choose electric weight estimated value q
kbattery condition satisfies condition
(wherein Q
m3< Q
m2) battery cell k, determine and adopt battery cell k to replace j place in circuit.
Wherein, " switch matrix control unit 500 reads the information that r and s battery are replaced from input signal; and navigate to respective switch in switch matrix according to associated batteries label; change the on off operating mode of respective switch; complete the replacement of battery cell " described in step 9, should " switch matrix " refer to the form that the tie point at each battery two ends is arranged into matrix, the node correspondence in matrix corresponding switch;
Should " switch matrix " be controlled by " switch matrix control unit 500 ", the state of battery cell two ends respective switch changes, and this battery cell connects the also change thereupon of mark of power supply;
The caused voltage fluctuation of switching process of being somebody's turn to do switch in " switch matrix " is very little, does not affect the continuity for system power supply.
(3) advantage and effect
The present invention is a kind of battery set charge/discharge balance method, and the scheme of battery-powered balance is provided, and has effectively improved the utilance of battery.Its switch matrix both can promptly have been located the tie point of each battery cell, accessed and picked out conversion, supported multiple battery cells to replace simultaneously; The switch mode of fast and flexible can not cause voltage fluctuation large in power supply circuits, is conducive to the normal O&M of power consumption equipment.
A kind of battery set charge/discharge balance method of the present invention has the function of the power management of optimizing using electricity system simultaneously.The time interval that user can upgrade by demand self-defining data; To the battery of place in circuit not, information measurement and renewal frequently, only replace there is battery, battery access state is adjusted; Can, in the normal work of guarantee system, reduce the workload of monitoring, distribute with management significant to the power supply of multiple batteries.
The present invention's ability that also promising system provides multichannel to export: when manually battery combination computing unit 400 being switched to after " integrated drive generator " pattern, can not rely on transformation facility, various power supplys output is provided, reduce circuit loss.
Brief description of the drawings
Fig. 1 is battery set charge/discharge balance method schematic flow sheet of the present invention;
Fig. 2 is the implementation procedure that battery information obtains and low electric weight battery is replaced, and has explained that battery pack charges and discharge working battery information in balance and electricity consumption distribution method detection system, replaces low electric weight cell process;
Fig. 3 be in system battery combination by 1,2,4,6,7,9,10 become 3,2,4,6,7,9,10 process, has explained the implementation procedure of (low electric weight or high electric weight) battery in battery set charge/discharge balance and electricity consumption distribution method replacement circuit;
Fig. 4 is that system chooses 1,2 according to electric weight situation, and 4,6,7,9,10 totally 7 batteries formations outputs, have explained battery set charge/discharge balance and electricity consumption distribution method independent assortment battery cell, realize the process of given power supply output;
Fig. 5 is that in system, battery pack 3,2,4,6,7,9,10 forms output 1, and battery 5 forms output 2, and the situation of expansion multichannel output, has explained that battery set charge/discharge balance and electricity consumption distribution method be not in the situation that adopting transformation facility, realizes the process of multichannel output;
Sequence number in accompanying drawing, code name, symbol description are as follows:
In Fig. 2～5, each numerical value has represented the numbering of respective battery monomer, supposes that when each battery cell is normally worked, output voltage is 4V;
In accompanying drawing 1～5, relate to switch matrix, in the time having n battery in system, each battery cell both positive and negative polarity respectively has an output node, and the node of each battery can be connected with other batteries arbitrarily by corresponding switch in switch matrix.In accompanying drawing 2～5:
A. i battery i (2i-1,2i) cathode node label is 2i-1, negative pole is 2i, the negative pole of the positive pole of i battery and j battery is contacted (in switch matrix corresponding switch closure) be designated as i × j (2i-1,2j)=1, contact is not designated as i × j (2i-1,2j)=0.
B. remember that it is 0 × i (2i-1)=1 that positive source output is connected with the positive pole of i battery; The negative pole of power cathode output and i battery is connected to: 0 × i (2i)=1.
C. when corresponding switch is closed in switch matrix in the accompanying drawings, mark with pore, do not close and disconnect with all default to ons of stain mark node.
D. anode connection is read from X direction, and the connection of negative pole is read from y direction.
Embodiment
Below in conjunction with accompanying drawing and instantiation, the present invention is described, the illustrative example is here only for clearer explanation the present invention, and conduct does not limit application of the present invention.
Enumerate 1: Fig. 3 has explained the implementation procedure of (low electric weight or high electric weight) battery in battery set charge/discharge balance and electricity consumption distribution method replacement circuit.Suppose No. 1 battery electric quantity (height) on the low side, replacing battery, to realize equilibrium step as described below.
A kind of battery set charge/discharge balance method of the present invention, is shown in shown in Fig. 1～5, and its concrete steps are as follows:
Step 1.1: battery combination computing unit 400 is under " replacement battery " pattern.
Step 1.2: t is put between at a time in battery voltage detection unit 100
1, obtain 1,2 by voltage sensor, 4,6,7,9, the output voltage U=[u at No. 10 battery two ends
1... u
7]
t, be input to battery electric quantity evaluation unit 200.
Step 1.3: battery electric quantity evaluation unit 200 receives the information of voltage of input, and in conjunction with the battery performance of self storage, to 1,2,4,6,7,9, the electric weight of No. 10 batteries estimates, and by current electric quantity estimated value
output to Capacity Predication of Battery based unit 300.
Step 1.4: Capacity Predication of Battery based unit 300 utilizes Q
1, and obtain current circuit total current by current sensor, and a upper moment (t of system storage
0) the electric weight relevant information Q of 1,2,4,6,7,9, No. 10 batteries
0, the electric quantity change trend of 1,2,4,6,7,9, No. 10 batteries of assessment, obtains next moment t of battery 1,2,4,6,7,9, No. 10
2power quantity predicting value
Step 1.5: system storage upgrades the electric weight estimated value Q of 1,2,4,6,7,9, No. 10 batteries
0→ Q
1.
Step 1.6: Capacity Predication of Battery based unit 300 is by 1,2,4,6, and 7,9, No. 10 batteries are at t
2the power quantity predicting value in moment
and mean value
output to battery combination computing unit 400.
Step 1.7: power quantity predicting value and the mean value thereof of the 400 comparative analysis inputs of battery combination computing unit
find the power quantity predicting value (height) on the low side of No. 1 battery;
The mean value of the power quantity predicting value of step 1.8 reference input
search for the electric weight estimated value of all the other (not place in circuit) batteries
and carry out comparative analysis, (electric weight estimated value is q from remaining 3,5, No. 8 battery, to choose No. 3 batteries
3) replace No. 1 battery, by label 1 and 3 and the two replacement information be input to switch matrix control unit 500.
Step 1.9: switch matrix control unit 500 reads the information that battery is replaced from input signal, switch matrix is done to following control: the switch (0 × 1 (1 that disconnects No. 1 battery two ends, 0)=0,2 × 1 (3,2)=0); The switch (0 × 3 (5 of closed No. 3 anodes and battery pack output, 0)=1), and the switch of No. 3 battery cathode and No. 2 anodes (2 × 3 (3,6)=1), complete the fast replacing to No. 1 battery in battery pack; No. 1 and No. 3 battery cells access state mark changes in system storage.
Step 1.10: from time point t
1go through time history Δ t and arrive t
2after, system enters next round monitoring.
The present invention is a kind of battery set charge/discharge balance method, can also realize following functions simultaneously:
1) independent assortment battery unit, meets the process of given output requirement.Below in conjunction with enumerate 2 and Fig. 2 explain this function.
Enumerate 2: Fig. 4 in conjunction with instance interpretation battery set charge/discharge balance and with electrical distribution independent assortment battery unit, meet the process of given output requirement.Suppose that 1,2,4,6,7,9, No. 10 battery cell tandem compounds are that system calculates according to electric weight situation, the step that realizes the output of 28V power supply is as follows:.
Battery combination computing unit 400 is switched to " integrated drive generator " pattern by user;
And input needs electricity consumption to be pressed onto battery combination computing unit 400;
Battery combination computing unit 400, by the battery that does not connect power supply is carried out to electric weight assessment, determines that needing the battery cell of access using electricity system is 1,2,4,6,7,9,10;
By the state (battery connects preceding switch and all disconnects) of corresponding switch in switch matrix control unit 500 control switch matrixes.Fig. 4 shows the situation of connection: the 1st positive pole (0 × 1 (1 that anode is exported corresponding to battery pack, 0)=1), the 2nd anode node is connected (2 × 1 (3 with the negative pole node of the 1st battery, 2)=1), the 2nd anode node is connected (2 × 1 (3 with the negative pole node of the 1st battery, 2)=1), the 4th anode node is connected (4 × 2 (7 with the negative pole node of the 2nd battery, 4)=1), the 6th anode node is connected (6 × 4 (11 with the negative pole node of the 4th battery, 8)=1), the 7th anode node is connected (7 × 6 (13 with the negative pole node of the 6th battery, 12)=1), the 9th anode node is connected with the negative pole node of the 7th battery
the 10th anode node is connected with the negative pole node of the 9th battery (10 × 9 (19,18)=1), the 10th battery cathode connects power supply output (0 × 10 (0,20)=1).Therefore only need the switch of appealing node place in control switch matrix by being disconnected to closure, can obtain required output;
In system storage, the connection power supply state of 1,2,4,6,7,9, No. 10 batteries is from not connecting and become connection; Battery combination computing unit 400 jumps to " replacement battery " pattern automatically.
2) the present invention has multiple output function, and according to subsystem requirements, directly assembled battery monomer, provides power supply output.Below in conjunction with enumerate 3 and Fig. 5 explain this function.
Enumerate 3: Fig. 4 shows that device can pass through battery 2,4,6,7,9,10 tandem compounds become the power supply output 1 of 24v, directly obtain power supply output 2 from No. 5 batteries simultaneously.Output 1 and 2 can be respectively used to there are two electronic circuits of different voltage requirements in using electricity system, and the process that the present invention realizes multiple power sources output function is as follows:
Battery combination computing unit 400 is switched to " integrated drive generator " pattern by user.
User inputs two and need separate with space between 400, two numerical value of battery combination computing unit with voltage value.
Battery combination computing unit 400 reads the voltage requirements of 24V and 4V with one-dimension array form; And need be respectively 6 and 1 with battery number of monomers order by calculative determination, and the information about power of reference (not in place in circuit) battery cell, determine battery 2,4,6,7,9,10 tandem compounds become 1, No. 5 battery of power supply output of 24v that power supply output 2 is provided, and the information of integrated drive generator is outputed to switch matrix control unit 500.
Switch matrix control unit 500 is identified " integrated drive generator " signal, navigates to the relevant position in switch matrix, controls corresponding on off state and changes into closure, obtains and needs with output 1 and 2.
Associated batteries monomer access state mark in system storage changes, and battery combination computing unit 400 automatically switches to " replacement battery " pattern.
Wherein: for 4V voltage requirements need with number of battery cells be 1, the information about power of system reference (not in place in circuit) battery cell, detect No. 5 battery electric quantities higher, for system battery monomer electric weight is tended to balance, choose No. 5 batteries output 2 is provided.
In the time that system has other power supply requirements, also can adopt to use the same method and obtain.
3) battery set charge/discharge balance method, without transformation facility an in the situation that, can also support combining forms different between battery cell as in parallel or series connection, realizes multiple Voltage-outputs.
Claims (10)
1. a battery set charge/discharge balance method, is characterized in that: its concrete steps are as follows:
Step 1: confirm that battery combination computing unit (400) is under " replacement battery " pattern;
Step 2: battery voltage detection unit (100) put t sometime
i, obtain the output voltage of each supplying cell monomer in battery pack, and be input to battery electric quantity evaluation unit (200); This supplying cell monomer number is m, and battery cell total number n in m< power-supply system;
Step 3: battery electric quantity evaluation unit (200) receives the information of voltage of input, and the battery performance of storing in conjunction with self, estimate the electric weight of each battery cell in supplying cell group, and by its current electric quantity estimated value
be input to Capacity Predication of Battery based unit (300);
Step 4: Capacity Predication of Battery based unit (300) utilize the electric weight estimated value of battery electric quantity evaluation unit (200) input, and obtain current circuit total current by current sensor, and a upper moment t in system storage
i-1the electric weight relevant information of each battery cell in supplying cell group, assesses the electric quantity change trend of these battery cells, next moment t of each battery cell in prediction supplying cell group
i+1power quantity predicting value
Step 5: system storage upgrades the electric weight estimated value Q of each battery cell in supplying cell group
i, with t
ithe electric weight estimated value in moment is as up-to-date storage data;
Step 6: Capacity Predication of Battery based unit (300) by each battery in supplying cell group at t
i+1the power quantity predicting value in moment
and mean value
be input to battery combination computing unit (400);
Step 7: the power quantity predicting value of battery combination computing unit (400) comparative analysis input
and mean value
find low or high electric weight battery cell, if do not find, target enters step 10; Otherwise record object battery cell s, enters step 8;
Step 8: battery combination computing unit (400) reference input information, all the other electric weight estimated values that supplying cell monomer, its number are not n-m in search power-supply system, find out as the battery cell r replacing, the battery mark of r and s and the replacement information of the two are outputed to switch matrix control unit (500);
Step 9: switch matrix control unit (500) reads the information of r and the replacement of s battery from input signal, and navigates to respective switch in switch matrix according to associated batteries label, changes the on off operating mode of respective switch, completes the replacement of battery cell; The status identifier of the battery that participation is replaced in system storage changes simultaneously; This status identifier is whether to be linked into circuit for identifying battery;
Step 10: from time point t
igo through time history Δ t and arrive t
i+1after, with time t
i+1for starting point repeats above step; In above-mentioned steps two, three, four, five, six, seven, the battery cell of powering to liking connection of operation, ignores these steps to not connecting the battery cell of power supply; Do not connect power supply and in the time storing, have specific diacritics with the each battery cell that is connected power supply.
2. a kind of battery set charge/discharge balance method according to claim 1, it is characterized in that: at " confirming that battery combination computing unit (400) is under ' replacement battery ' pattern " described in step 1, should " replacement battery " pattern refer to the operating state that power-supply system is given tacit consent to.
3. a kind of battery set charge/discharge balance method according to claim 1, is characterized in that: " the time point t of indication in step 2
i" and next time point t
i+1between time interval Δ t preset by user.
4. a kind of battery set charge/discharge balance method according to claim 1, is characterized in that: described in step 2 " battery voltage detection unit (100) put t sometime
i, obtain the output voltage of each supplying cell monomer in battery pack, and be input to battery electric quantity evaluation unit (200) ", its method of obtaining is to realize by the voltage sensor in the each battery cell two ends configuration that connects power supply.
5. a kind of battery set charge/discharge balance method according to claim 1, is characterized in that: " system storage " relating in step 4, all has distribute data memory space to n battery cell, wherein
6. a kind of battery set charge/discharge balance method according to claim 1, is characterized in that: at " the electric weight estimated value Q of each battery cell in system storage renewal supplying cell group described in step 5
i, with t
ithe electric weight estimated value in moment is as up-to-date storage data ", this system storage more principle of new data is: to connecting the battery cell of power supply, what read is the last data of measuring before upgrading; To the current battery that does not connect power supply, read the information while connection last time, what power storage if never connect is initial information.
7. a kind of battery set charge/discharge balance method according to claim 1, is characterized in that: in " the power quantity predicting value of battery combination computing unit (400) comparative analysis input described in step 7
and mean value
find low or high electric weight battery cell ", determine with following method: will connect the power quantity predicting value of the battery cell j powering
average electricity predicted value with place battery cell
relatively, when the two difference is greater than a certain threshold value
time, determine that j is low or high electric weight battery.
8. a kind of battery set charge/discharge balance method according to claim 1, it is characterized in that: in " pond combination computing unit (400) reference input information; all the other electric weight estimated values of supplying cell monomer not in search power-supply system " described in step 8, should " all the other in power-supply system not the electric weight estimated value of supplying cell monomer ", be that respective battery monomer upgrades while accessing last time, from system storage, read.
9. a kind of battery set charge/discharge balance method according to claim 1, it is characterized in that: in " battery combination computing unit (400) reference input information; all the other electric weight estimated values of supplying cell monomer not in search power-supply system; find out as the battery cell r replacing " described in step 8, should " find out as the battery cell r replacing " and realize with following method: never connect in the battery cell of power supply and choose electric weight estimated value q
kbattery condition satisfies condition
(wherein Q
m3< Q
m2) battery cell k, determine and adopt battery cell k to replace j place in circuit.
10. a kind of battery set charge/discharge balance method according to claim 1, it is characterized in that: " switch matrix control unit (500) reads the information that r and s battery are replaced from input signal; and navigate to respective switch in switch matrix according to associated batteries label; change the on off operating mode of respective switch; complete the replacement of battery cell " described in step 9, should " switch matrix " refer to the form that the tie point at each battery two ends is arranged into matrix, the node correspondence in matrix corresponding switch; Should " switch matrix " be controlled by " switch matrix control unit (500) ", the state of battery cell two ends respective switch changes, and this battery cell connects the also change thereupon of mark of power supply; The caused voltage fluctuation of switching process of being somebody's turn to do switch in " switch matrix " is very little, does not affect the continuity for system power supply.
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Cited By (2)
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| CN105656107A (en) * | 2014-12-08 | 2016-06-08 | 财团法人工业技术研究院 | Programmable battery power architecture and method thereof |
| CN108414926A (en) * | 2018-03-06 | 2018-08-17 | 苏州正力蔚来新能源科技有限公司 | Relay health status for quick-change power battery pack records system |
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| CN103545853A (en) * | 2012-07-13 | 2014-01-29 | 上海灏睿科技发展有限公司 | Intelligent lithium battery pack management system |
| JP2014119397A (en) * | 2012-12-18 | 2014-06-30 | Toshiba Corp | Battery state estimation apparatus of secondary battery |
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| CN101860056A (en) * | 2010-05-24 | 2010-10-13 | 宁波高新区申特科技有限公司 | Power lithium battery pack balancing and managing system based on Map model |
| CN103545853A (en) * | 2012-07-13 | 2014-01-29 | 上海灏睿科技发展有限公司 | Intelligent lithium battery pack management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105656107A (en) * | 2014-12-08 | 2016-06-08 | 财团法人工业技术研究院 | Programmable battery power architecture and method thereof |
| CN105656107B (en) * | 2014-12-08 | 2018-03-06 | 财团法人工业技术研究院 | Programmable battery power architecture and method thereof |
| US10630086B2 (en) | 2014-12-08 | 2020-04-21 | Industrial Technology Research Institute | Programmable battery source architecture and method thereof |
| CN108414926A (en) * | 2018-03-06 | 2018-08-17 | 苏州正力蔚来新能源科技有限公司 | Relay health status for quick-change power battery pack records system |
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| CN104167775B (en) | 2016-09-28 |
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