CN102709967A - Battery management system and battery management method - Google Patents
Battery management system and battery management method Download PDFInfo
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- CN102709967A CN102709967A CN2012101515561A CN201210151556A CN102709967A CN 102709967 A CN102709967 A CN 102709967A CN 2012101515561 A CN2012101515561 A CN 2012101515561A CN 201210151556 A CN201210151556 A CN 201210151556A CN 102709967 A CN102709967 A CN 102709967A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the invention discloses a battery management system, which comprises a battery acquisition circuit board and a battery equalization circuit board, wherein the battery acquisition circuit board is respectively connected with a plurality of batteries which are connected in series in a battery chamber; the battery equalization circuit board is respectively connected with the plurality of batteries which are connected in series; the battery equalization circuit board is connected with the battery acquisition circuit board through a bus; and when the battery acquisition circuit board is used for acquiring the voltage of each battery in the plurality of batteries connected in series, the charging or discharging situation of each battery is controlled by the battery equalization circuit board according to the acquired voltage of each battery. The embodiment of the invention further discloses a battery management method. With the adoption of the battery management system and the battery management method, the charging or discharging situation of each battery is equalized, so that the service life of the whole battery chamber can be improved.
Description
Technical field
The present invention relates to field of batteries, relate in particular to a kind of battery management system and method.
Background technology
At present, electric motor car etc. with the power supply be power supply that the equipment of kinetic energy uses have usually 5 groups, wherein in 4 groups every group be in series by 24 batteries, another group is in series by 18 batteries, forms the power supply that is in series by 114 batteries altogether.When electric motor car was worked, these 114 batteries discharged simultaneously, provide electric motor car work required electric energy, and when electric motor car charged, these 114 batteries charged simultaneously, carry out energy reserve.
The inventor finds in practice, is accompanied by the use of electric motor car, and these 114 batteries can engender the charging and/or the uneven phenomenon of discharging, and promptly the velocity of discharge of some battery is very fast, and the charging rate of some battery is very fast; Because charging and/or discharge inhomogeneously will directly cause some battery to be in for a long time overcharging or cross putting state, thereby reduce the useful life of these batteries, thereby cause the useful life of these 114 batteries inhomogeneous.But, say for power supply, if in 24 or 18 batteries in a group there is any battery premature termination life-span, mean that so this Battery pack need put in order group replacement, the useful life that therefore will reduce this Battery pack.
Summary of the invention
Embodiment of the invention technical problem to be solved is, a kind of battery management system and method are provided, and can improve the useful life of whole Battery pack.
In order to solve the problems of the technologies described above, the embodiment of the invention provides a kind of battery management system, comprising: battery collecting circuit board and battery equalizing circuit plate;
Said battery collecting circuit board is connected respectively with a plurality of batteries of the interior series connection of battery case, and the battery equalizing circuit plate is connected respectively with a plurality of batteries of said series connection, and said battery equalizing circuit plate is connected through bus with said battery collecting circuit board;
When said battery collecting circuit board was gathered the voltage of each battery in a plurality of batteries of said series connection, said battery equalizing circuit buttress was controlled the charge or discharge situation of said each battery according to the voltage of each battery of said collection.
Wherein, said battery equalizing circuit plate comprises: balanced control chip, switch arrays, dissipative cell and DC-to-dc DC-DC power supply;
Said balanced control chip is connected with said switch arrays, and said switch arrays are connected with the DC-DC power supply with said dissipative cell respectively;
Said balanced control chip control said switch arrays with in the voltage of each battery of said collection less than corresponding battery and the said DC-DC power connection of voltage of charging threshold value, by said DC-DC power supply to battery charge less than the voltage correspondence of charging threshold value;
And/or; Said balanced control chip is controlled said switch arrays with connecting with said dissipative cell greater than the corresponding battery of the voltage of charging threshold value in the voltage of each battery of said collection, by said dissipative cell to battery discharge greater than the voltage correspondence of charging threshold value;
And/or; The difference of said balanced control chip maximum voltage and minimum voltage in the voltage of each battery of gathering is during greater than the counterbalanced gate limit value; Control said switch arrays battery and said DC-DC power connection that minimum voltage is corresponding, by the said DC-DC power supply battery charge corresponding to said minimum voltage.
Wherein, said battery collecting circuit board comprises: battery acquisition controlling chip and one or more battery acquisition chip, and said battery acquisition chip is connected with a plurality of batteries of series connection in the said battery case;
When said battery collecting circuit board comprised a battery acquisition chip, said battery acquisition controlling chip was connected with this piece battery acquisition chip;
When said battery collecting circuit board comprises polylith battery acquisition chip, the mutual cascade of said polylith battery acquisition chip, and said battery acquisition controlling chip with the series connection after said polylith battery acquisition chip in first battery acquisition chip be connected;
When said battery acquisition chip was gathered voltage and/or the temperature of each battery in said a plurality of battery, said battery acquisition controlling chip obtained the voltage and/or the temperature of each battery that said battery acquisition chip gathers.
Wherein, said battery management system also comprises: master control circuit board;
Said master control circuit board is connected through bus with the battery equalizing circuit plate with said battery collecting circuit board;
When said battery collecting circuit board is gathered the voltage of each battery in said a plurality of battery; Said master control circuit board is controlled said battery equalizing circuit plate the charge or discharge situation of said each battery is controlled according to the voltage of each battery of said collection.
Wherein, said battery management system also comprises: display, and said display is connected with said master control circuit board;
When said battery collecting circuit board is gathered the voltage of each battery in said a plurality of battery,
Said master control circuit board shows the voltage of each battery of said collection through said display; And/or,
Said master control circuit board shows the ceiling voltage in the voltage of each battery of said collection through said display; And/or,
The said master control circuit board position of battery in battery case that the ceiling voltage in the voltage of each battery of said collection is corresponding shows through said display; And/or,
Said master control circuit board shows the minimal pressure in the voltage of each battery of said collection through said display; And/or,
The said master control circuit board position of battery in battery case that the minimum voltage in the voltage of each battery of said collection is corresponding shows through said display; And/or,
Said master control circuit board is calculated the dump energy of said each battery according to the voltage and the battery behavior curve of each battery of said collection, and the said dump energy that calculates is shown through said display.
Wherein, when said battery collecting circuit board is also gathered the temperature of at least one battery in said a plurality of battery,
Said master control circuit board shows the temperature of said collection through said display.
Wherein, said master control circuit board comprises: the master control chip also comprises: at least one item in total voltage Acquisition Circuit, total current Acquisition Circuit and the temperature collection circuit;
Said master control chip is connected with temperature collection circuit with said stagnation pressure Acquisition Circuit, total current Acquisition Circuit; Said master control chip is connected with said display, and said master control chip is connected through bus with the battery equalizing circuit plate with said battery collecting circuit board;
Said total voltage Acquisition Circuit and the interior a plurality of batteries parallel connections of connecting of said battery case; When said total voltage Acquisition Circuit was gathered the total voltage of a plurality of batteries of said series connection, said master control chip showed the total voltage of said collection on said display;
Said total current Acquisition Circuit and the interior a plurality of batteries series connection of connecting of said battery case; When said total current Acquisition Circuit was gathered the total current of a plurality of batteries of said series connection, said master control chip showed the total current of said collection on said display;
Said temperature collection circuit is connected with said battery case, and when said temperature collection circuit was gathered the temperature of said battery case, said master control chip showed the temperature of said collection on said display.
Correspondingly, the embodiment of the invention also provides a kind of battery management method, comprising:
Gather the voltage of each battery of connecting each other in the battery case;
According to the voltage of each battery of said collection, respectively said each battery is carried out charge or discharge control;
The voltage of wherein said each battery according to said collection carries out charge or discharge control to said each battery respectively, comprising:
According to the voltage of each battery of said collection, the battery of voltage less than the charging threshold value charged;
And/or, according to the voltage of each battery of said collection, the battery of voltage greater than the discharge threshold value discharged;
And/or, according to the voltage of each battery of said collection, during greater than the counterbalanced gate limit value, the battery with said minimum voltage is charged in the difference of ceiling voltage and minimum voltage.
Wherein, after the voltage of each battery of connecting each other in the said collection battery case, also comprise:
The voltage that shows each battery of said collection;
And/or, show the ceiling voltage in the voltage of each battery of said collection;
And/or, show in the voltage of each battery of said collection in the corresponding position of battery in battery case of ceiling voltage;
And/or, show the minimum voltage in the voltage of each battery of said collection;
And/or, show the corresponding position of battery in battery case of minimum voltage in the voltage of each battery of said collection;
And/or, according to the voltage and the battery behavior curve of each battery of gathering, calculate the dump energy of said each battery, and show the dump energy that calculates.
Wherein, also comprise: gather in the said battery case at least one in the temperature of total voltage, total current and the said battery case of each battery of series connection each other, and show; Perhaps, gather the temperature of at least one battery in each battery of connecting each other in the said battery case, and show.
Embodiment of the present invention embodiment has following beneficial effect:
The embodiment of the invention is gathered the voltage of each battery in a plurality of batteries of connecting in the battery case by the battery collecting circuit board; And according to the voltage of each battery of gathering; By the battery equalizing circuit plate charge or discharge situation of each battery is controlled, thereby avoided battery to occur overcharging or cross putting phenomenon, thereby keep the consistency of each battery; Avoid the whole group electricity of single battery influence group, to improve the useful life of whole Battery pack.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the embodiment of battery management system of the present invention;
Fig. 2 is the structural representation of the embodiment of the battery collecting circuit board among Fig. 1;
Fig. 3 is the structural representation of the embodiment of the battery equalizing circuit plate among Fig. 1;
Fig. 4 is a sketch map that battery is carried out charge or discharge;
Fig. 5 is the structural representation of the embodiment of the master control circuit board among Fig. 1;
Fig. 6 is the interface sketch map of embodiment of the display interface of the display among Fig. 1;
Fig. 7 is the schematic flow sheet of the embodiment of battery management method of the present invention.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
Please refer to Fig. 1, is the configuration diagram of the embodiment of battery management system of the present invention.
This battery management system comprises: battery collecting circuit board 1, battery equalizing circuit plate 2, master control circuit board 3 and display 4.
Wherein, battery collecting circuit board 1, battery equalizing circuit plate 2 and master control circuit board 3 can be connected through bus (BUS), and this bus is that the message transmission between battery collecting circuit board 1, battery equalizing circuit plate 2 and the master control circuit board 3 provides support; In some embodiments, this bus can be chosen for CAN (Controller Area Network, controller local area network) bus or EPA bus etc.
Wherein, master control circuit board 3 also is connected with display 4, passes to display with the information that will need display 4 to show by means of this connection; In some embodiments, master control circuit board 3 can be connected through the RS-485 bus with display.
Below in conjunction with Fig. 2-6, each part to the battery management system of the embodiment of the invention describes respectively.
Please refer to Fig. 2, is the structural representation of the embodiment of battery collecting circuit board 1 of the present invention.
This battery collecting circuit board 1 comprises: battery acquisition controlling chip 12 and one or more (having illustrated 4 among the figure) battery acquisition chip 11.
Wherein, the master control circuit board 3 among battery acquisition controlling chip 12 and Fig. 1 and battery equalizing circuit plate 3 are connected through bus.Battery acquisition controlling chip 12 also is connected with battery acquisition chip 11; In some execution modes; When battery acquisition chip 11 has polylith; These battery acquisition chip 11 cascades, battery acquisition controlling chip 12 is connected with first battery acquisition chip 11 of series connection, and first battery gathered 11 in core and is meant the battery acquisition chip 11 that is positioned at series connection stem or afterbody here.
A kind of execution mode as Fig. 2 embodiment; The model that battery acquisition chip 11 among Fig. 2 can adopt company of Texas Instrument (TI) to release is the battery management chip of BQ76PL536, the microprocessor that battery acquisition controlling chip 12 can adopt ARM (Advanced RISC Machines) company to release.
Please refer to Fig. 3, is the structural representation of the embodiment of battery equalizing circuit plate 2 of the present invention.
This battery equalizing circuit plate 2 comprises: balanced control chip 21, switch arrays 22, dissipative cell 23 and DC-DC (DC-DC) power supply 24.
Wherein, balanced control chip 21 is connected with switch arrays 22, the switch situation that balanced control chip 21 can control switch array 22.Switch arrays 22 can be realized that by a plurality of MOS switching tubes (a kind of common switch) switch arrays 22 also are connected with DC-DC power supply 24 with dissipative cell 23, and switch arrays also with battery case in a plurality of batteries of connecting be connected; Switch arrays 22 can be selected battery and dissipative cell 23 or 24 connections of DC-DC power supply; When switch arrays 22 are connected battery and dissipative cell 23; Dissipative cell 23 is with the voltage of consuming cells, thereby realization prevents the battery overvoltage to the discharge of battery; When switch arrays 22 are connected battery and DC-DC power supply 24, DC-DC power supply 24 will charge to battery.
Can know by Fig. 2 embodiment; After battery collecting circuit board 1 collects the voltage of battery; Can voltage be sent on the bus; To offer battery equalizing circuit plate 2 and/or master control circuit board 3, therefore balanced control chip 21 can directly obtain the voltage of each battery of collection from battery collecting circuit board 1, perhaps obtains the voltage of each battery of collection through master control circuit board.After balanced control chip 21 gets access to the voltage of each battery, can be according to the voltage of each battery, through the charge or discharge situation of switch arrays 22 each batteries of control.Particularly:
In some execution modes, balanced control chip 21 control switch arrays 22 are battery and DC-DC power supply 24 connections of voltage less than the charging thresholding, by DC-DC power supply 24 it are charged.For example: for lithium battery; Can the preset charged threshold value be 3.000V; Balanced control chip 21 is receiving the voltage signal of 6 batteries sometime; Be respectively: first battery (3.211V), second battery (3.212V), the 3rd battery (3.300V), the 4th battery (3.1115V), the 5th battery (2.885V) and the 6th battery (3.111V), balanced control chip 21 finds that through relatively the voltage of the 5th battery is lower than preset charging threshold value; Then balanced control chip 21 control switch arrays 22 are connected the 5th battery and DC-DC power supply 24, by DC-DC power supply 24 it are charged.Further, balanced control chip 21 charging interval that can also preset 24 pairs the 5th batteries of DC-DC power supply.
In some execution modes, balanced control chip 21 control switch arrays 22 are battery and dissipative cell 23 connections of voltage greater than the discharge threshold value, by dissipative cell 23 it are discharged, and dissipative cell 23 can be realized by resistance here.For example: for lithium battery; Can the preset charged threshold value be 3.600V; Balanced control chip 21 is receiving the voltage signal of 6 batteries sometime; Be respectively: first battery (3.211V), second battery (3.211V), the 3rd battery (3.322V), the 4th battery (3.400V), the 5th battery (3.552V) and the 6th battery (3.865 V), balanced control chip 21 are through comparing, and the voltage of finding the 6th battery is greater than preset discharge threshold value; Then balanced control chip 21 control switch arrays 22 are connected the 6th battery and dissipative cell 23, consume the electric energy that overcharges on it by dissipative cell 23.Further, balanced control chip 21 can also be preset the power consumption time of 23 pairs the 6th batteries of dissipative cell.
In some execution modes; The difference of balanced control chip 21 ceiling voltage and minimum voltage in the voltage of each battery of gathering is during greater than the counterbalanced gate limit value; Battery that the control switch array is corresponding with minimum voltage and DC-DC power supply 24 are connected, and are charged by 24 pairs of these batteries of DC-DC power supply.For example: common balanced control chip 21 can compare the voltage of 24 batteries in a group; And the voltage of relatively finding first battery in these 24 batteries is the highest, is 3.500V, and the voltage of the 12 battery is minimum to be 3.000V; And preset counterbalanced gate limit value is 0.300V; Obviously 3.500V-3.000V>0.300V, therefore balanced control chip 21 control switch arrays 22 are the 12 battery and 24 connections of DC-DC power supply, by DC-DC power supply 24 it are charged.
Need to prove; All be to compare in the above-mentioned execution mode, and then confirm and to charge or which battery is discharged which battery by the cell voltage of 21 pairs of collections of balanced control chip and charging threshold value, discharge threshold value or counterbalanced gate limit value.But, it is understandable that above-mentioned comparison and definite operation also can be placed on the master control circuit board 3 to be carried out, by master control circuit board 3 draw need carry out charge or discharge to which battery after, and battery equalizing circuit plate 2 is given in indication; Battery balanced control board 2 carries out charge or discharge according to the indication of master control circuit board 3 to corresponding battery.At this moment, battery balanced control board 2 only is equivalent to the execution unit as charge or discharge.
Fig. 4 shows a sketch map that battery is carried out charge or discharge.In Fig. 4, dissipative cell 23 is realized that by resistance switch arrays 24 are realized by 3 switches, through 3 switches in the control diagram, can the control of charge or discharge be carried out in battery and resistance or 24 connections of DC-DC power supply to battery with realization.
Please refer to Fig. 5, is the structural representation of the embodiment of master control circuit board 3 of the present invention.
This master control circuit board 3 comprises: master control chip 31, stagnation pressure Acquisition Circuit 32, total current Acquisition Circuit 33 and temperature collection circuit 34.
Wherein, Master control chip 31 is connected with stagnation pressure Acquisition Circuit 32, total current Acquisition Circuit 33 and temperature collection circuit 34; Master control chip 31 also is connected with battery equalizing circuit plate 2 with battery collecting circuit board 1 through bus, and master control chip 31 also is connected with display 4.
In some execution modes; When battery collecting circuit board 1 is gathered the voltage of each battery, and/or, during the temperature of at least one battery; Master control chip 31 can receive voltage and/or the temperature that battery collecting circuit board 1 is gathered from bus, and shows through display 4.Further, master control chip 31 also shows the position of each battery through display.
In some execution modes; When battery collecting circuit board 1 is gathered the voltage of each battery; Master control chip 31 can receive the voltage of each battery of battery collecting circuit board 1 collection from bus; And through ceiling voltage and/or minimum voltage in described each voltage of display 4 demonstrations, and the position of respective battery.
In some execution modes; When battery collecting circuit board 1 is gathered the voltage of each battery; Master control chip 31 can receive the voltage of each battery of battery collecting circuit board 1 collection from bus; And according to the dump energy of each battery of battery behavior curve calculation, and show the dump energy of each battery through display.Wherein, the battery behavior curve is meant the corresponding relation of voltage and dump energy (SOC).
In some execution modes, total voltage Acquisition Circuit 32 and the interior a plurality of batteries parallel connections of connecting of battery case are used to gather the total voltage in the battery case; After total voltage Acquisition Circuit 32 collects total voltage, the total voltage of gathering is sent to master control chip 31, master control chip 31 shows it through display 4.
In some execution modes, a plurality of batteries that total current Acquisition Circuit 33 is connected with battery case are connected, and are used to gather total stream of a plurality of batteries of series connection in the battery case; After total current Acquisition Circuit 33 collects total current, the total current of gathering is sent to master control chip 31, master control chip 31 shows it through display.
In some execution modes, temperature collection circuit 34 is connected with battery case, gathers the temperature of battery case; When temperature collection circuit 34 collected the temperature of battery case, master control chip 31 showed the temperature of gathering on display 4.
Please refer to Fig. 6, is the interface sketch map of embodiment at the interface of display of the present invention.
Shown in Figure 6, the display interface 41 of display 4 can be one 4.3 cun a capacitance touch display screen, has divided 7 zones above that, is respectively:
One group 1 one groups 2 one groups 8 one groups 10 ... One group 24
35℃ 35℃ 35℃ 35℃ …… 35℃
Zone 422 is used to show the current temperature value of battery case.
Zone 423 is used to show cell voltage, and the user can should the zone to amplify through click on area 423, thereby checks the current voltage of interior each battery of battery case in detail, and regional 423 content displayed forms can be:
One group 1 one groups 2 one groups 3 one groups 4 ... One group 24
3.511V 3.445V 3.525V 3.636V …… 3.445V
Above-mentioned embodiment through Fig. 1 to Fig. 6 has carried out detailed explanation to the battery management system of embodiments of the invention.Can know by above-mentioned disclosed content; The embodiment of the invention is gathered the voltage of each battery in the battery case through battery collection plate 1; And according to the voltage of each battery of gathering the charge or discharge situation of each battery is controlled through battery balanced plate 2; Thereby the charge or discharge situation of balanced each battery, thereby make that the life-span of each battery is almost consistent, the scrapping of avoiding certain battery to terminate in advance and cause to whole Battery pack owing to the life-span.And; The embodiment of the invention also shows information such as the dump energy, total voltage, total current, battery case temperature, ceiling voltage of temperature, each battery of voltage, each battery of each battery, the highest voltage and position, minimum voltage and position, therefore can make things convenient for the user to be well understood to the working condition in the battery case.
Please refer to Fig. 7, is the schematic flow sheet of first embodiment of battery management method of the present invention.
The method flow of Fig. 7 comprises:
Step S71 gathers the interior voltage of each battery of series connection each other of battery case.
Step S72 according to the voltage of each battery of said collection, carries out charge or discharge control to said each battery respectively.
Particularly, step S72 comprises: according to the voltage of each battery of gathering, the battery of voltage less than the charging threshold value charged;
And/or, according to the voltage of each battery of gathering, the battery of voltage greater than the discharge threshold value discharged;
And/or according to the voltage of each battery of gathering, when the difference of ceiling voltage and minimum voltage was greater than the counterbalanced gate limit value therein, the battery corresponding to minimum voltage charged.
Further, after step S71, can also comprise:
The voltage that shows each battery of said collection;
And/or, the maximum voltage in the voltage of each battery that demonstration is gathered;
And/or, the position of battery in battery case that the maximum voltage in the voltage of each battery that demonstration is gathered is corresponding;
And/or, the minimum voltage in the voltage of each battery that demonstration is gathered;
And/or, the position of battery in battery case that the minimum voltage in the voltage of each battery that demonstration is gathered is corresponding;
And/or voltage and battery behavior curve according to each battery of gathering calculate the dump energy of each battery, and show the dump energy in each battery.
Further, said method can also comprise: gather in the said battery case at least one in the temperature of total voltage, total current and the said battery case of each battery of series connection each other, and show.Perhaps, gather the temperature of at least one battery in the said battery case, and show.Preferentially, for one group of 24 battery, gather the wherein temperature of 8 batteries.
Need to prove; Each step of present embodiment or operation all can be realized by the corresponding hardware of Fig. 1-Fig. 6 embodiment; Therefore the explanation and the beneficial effect of above-mentioned each step or operation are all specifically narrated in the embodiment of Fig. 1-Fig. 6, do not given unnecessary details at this.
One of ordinary skill in the art will appreciate that all or part of flow process that realizes in the foregoing description method; Be to instruct relevant hardware to accomplish through computer program; Described program can be stored in the computer read/write memory medium; This program can comprise the flow process like the embodiment of above-mentioned each side method when carrying out.Wherein, described storage medium can be magnetic disc, CD, read-only storage memory body (Read-Only Memory, ROM) or at random store memory body (Random Access Memory, RAM) etc.
Above disclosedly be merely preferred embodiment of the present invention; Certainly can not limit the present invention's interest field with this; One of ordinary skill in the art will appreciate that all or part of flow process that realizes the foregoing description; And, still belong to the scope that invention is contained according to the equivalent variations that claim of the present invention is done.
Claims (10)
1. a battery management system is characterized in that,
Comprise: battery collecting circuit board and battery equalizing circuit plate;
Said battery collecting circuit board is connected respectively with a plurality of batteries of the interior series connection of battery case, and the battery equalizing circuit plate is connected respectively with a plurality of batteries of said series connection, and said battery equalizing circuit plate is connected through bus with said battery collecting circuit board;
When said battery collecting circuit board was gathered the voltage of each battery in a plurality of batteries of said series connection, said battery equalizing circuit buttress was controlled the charge or discharge of said each battery according to the voltage of each battery of said collection.
2. battery management system as claimed in claim 1 is characterized in that,
Said battery equalizing circuit plate comprises: balanced control chip, switch arrays, dissipative cell and DC-to-dc DC-DC power supply;
Said balanced control chip is connected with said switch arrays, and said switch arrays are connected with the DC-DC power supply with said dissipative cell respectively;
Said balanced control chip control said switch arrays with in the voltage of each battery of said collection less than corresponding battery and the said DC-DC power connection of voltage of charging threshold value, by said DC-DC power supply to battery charge less than the voltage correspondence of charging threshold value;
And/or; Said balanced control chip is controlled said switch arrays with connecting with said dissipative cell greater than the corresponding battery of the voltage of charging threshold value in the voltage of each battery of said collection, by said dissipative cell to battery discharge greater than the voltage correspondence of charging threshold value;
And/or; The difference of said balanced control chip maximum voltage and minimum voltage in the voltage of each battery of gathering is during greater than the counterbalanced gate limit value; Control said switch arrays battery and said DC-DC power connection that minimum voltage is corresponding, by the said DC-DC power supply battery charge corresponding to said minimum voltage.
3. battery management system as claimed in claim 1 is characterized in that,
Said battery collecting circuit board comprises: battery acquisition controlling chip and one or more battery acquisition chip, and said battery acquisition chip is connected with a plurality of batteries of series connection in the said battery case;
When said battery collecting circuit board comprised a battery acquisition chip, said battery acquisition controlling chip was connected with this piece battery acquisition chip;
When said battery collecting circuit board comprises polylith battery acquisition chip, the mutual cascade of said polylith battery acquisition chip, and said battery acquisition controlling chip with the series connection after said polylith battery acquisition chip in first battery acquisition chip be connected;
When said battery acquisition chip was gathered voltage and/or the temperature of each battery in said a plurality of battery, said battery acquisition controlling chip obtained the voltage and/or the temperature of each battery that said battery acquisition chip gathers.
4. like each described battery management system among the claim 1-3, it is characterized in that,
Said battery management system also comprises: master control circuit board;
Said master control circuit board is connected through bus with the battery equalizing circuit plate with said battery collecting circuit board;
When said battery collecting circuit board is gathered the voltage of each battery in said a plurality of battery; Said master control circuit board is controlled said battery equalizing circuit plate the charge or discharge situation of said each battery is controlled according to the voltage of each battery of said collection.
5. battery management system as claimed in claim 4 is characterized in that,
Said battery management system also comprises: display, and said display is connected with said master control circuit board;
When said battery collecting circuit board is gathered the voltage of each battery in said a plurality of battery,
Said master control circuit board shows the voltage of each battery of said collection through said display; And/or,
Said master control circuit board shows the ceiling voltage in the voltage of each battery of said collection through said display; And/or,
The said master control circuit board position of battery in battery case that the ceiling voltage in the voltage of each battery of said collection is corresponding shows through said display; And/or,
Said master control circuit board shows the minimal pressure in the voltage of each battery of said collection through said display; And/or,
The said master control circuit board position of battery in battery case that the minimum voltage in the voltage of each battery of said collection is corresponding shows through said display; And/or,
Said master control circuit board is calculated the dump energy of said each battery according to the voltage and the battery behavior curve of each battery of said collection, and the said dump energy that calculates is shown through said display.
6. battery management system as claimed in claim 5 is characterized in that,
When said battery collecting circuit board was also gathered the temperature of at least one battery in said a plurality of battery, said master control circuit board showed the temperature of said collection through said display.
7. battery management system as claimed in claim 5 is characterized in that,
Said master control circuit board comprises: the master control chip also comprises: at least one item in total voltage Acquisition Circuit, total current Acquisition Circuit and the temperature collection circuit;
Said master control chip is connected with temperature collection circuit with said stagnation pressure Acquisition Circuit, total current Acquisition Circuit; Said master control chip is connected with said display, and said master control chip is connected through bus with the battery equalizing circuit plate with said battery collecting circuit board;
Said total voltage Acquisition Circuit and the interior a plurality of batteries parallel connections of connecting of said battery case; When said total voltage Acquisition Circuit was gathered the total voltage of a plurality of batteries of said series connection, said master control chip showed the total voltage of said collection on said display;
Said total current Acquisition Circuit and the interior a plurality of batteries series connection of connecting of said battery case; When said total current Acquisition Circuit was gathered the total current of a plurality of batteries of said series connection, said master control chip showed the total current of said collection on said display;
Said temperature collection circuit is connected with said battery case, and when said temperature collection circuit was gathered the temperature of said battery case, said master control chip showed the temperature of said collection on said display.
8. a battery management method is characterized in that, comprising:
Gather the voltage of each battery of connecting each other in the battery case;
According to the voltage of each battery of said collection, respectively said each battery is carried out charge or discharge control;
The voltage of wherein said each battery according to said collection carries out charge or discharge control to said each battery respectively, comprising:
According to the voltage of each battery of said collection, the battery of voltage less than the charging threshold value charged;
And/or, according to the voltage of each battery of said collection, the battery of voltage greater than the discharge threshold value discharged;
And/or, according to the voltage of each battery of said collection, during greater than the counterbalanced gate limit value, the battery with said minimum voltage is charged in the difference of ceiling voltage and minimum voltage.
9. method as claimed in claim 8 is characterized in that, after the voltage of each battery of connecting each other in the said collection battery case, also comprises:
The voltage that shows each battery of said collection;
And/or, show the ceiling voltage in the voltage of each battery of said collection;
And/or, show the corresponding position of battery in battery case of ceiling voltage in the voltage of each battery of said collection;
And/or, show the minimum voltage in the voltage of each battery of said collection;
And/or, show the corresponding position of battery in battery case of minimum voltage in the voltage of each battery of said collection;
And/or, according to the voltage and the battery behavior curve of each battery of gathering, calculate the dump energy of said each battery, and show the dump energy that calculates.
10. like claim 8 or 9 described methods, it is characterized in that, also comprise:
Gather in the said battery case at least one in the temperature of total voltage, total current and the said battery case of each battery of series connection each other, and show;
Perhaps, gather the temperature of at least one battery in each battery of connecting each other in the said battery case, and show.
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Application publication date: 20121003 |