CN105098845B - Battery management system - Google Patents
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- CN105098845B CN105098845B CN201410150791.6A CN201410150791A CN105098845B CN 105098845 B CN105098845 B CN 105098845B CN 201410150791 A CN201410150791 A CN 201410150791A CN 105098845 B CN105098845 B CN 105098845B
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Abstract
The invention discloses a kind of battery management systems, for carrying out electric quantity balancing at least two groups of battery packs, each battery pack includes at least two battery cells, battery management system includes central control unit and the battery management unit corresponding to each battery pack, it is connected between central control unit and each battery management unit by CAN bus, battery management unit is for carrying out the battery cell in corresponding battery pack electric quantity balancing in group, and central control unit is for electric quantity balancing carrying out group to battery pack.By the above-mentioned means, the battery management system of the present invention can realize electric quantity balancing between electric quantity balancing in the group of battery pack and the group for realizing battery pack simultaneously, electric quantity balancing effect is effectively promoted.
Description
Technical field
The present invention relates to field of battery management, more particularly to a kind of battery management system.
Background technology
In existing battery technology field, accumulator because be it is a kind of power convenient, safe and reliable DC energy source due to it is extensive
It applies in every field.Accumulator can convert electrical energy into chemical energy and store, and when in use can turn chemical energy
Become electric energy.However, since accumulator is a kind of chemical reaction equipment, internal chemical reaction is generally difficult to discover in time,
The defects of routine use, which generally requires long-term and frequent use, can just display.Furthermore the chemical characteristic of accumulator is determined
The range of its fixed operating voltage has stringent limitation, and safety can be generated when the operating voltage of accumulator is higher than ceiling voltage limits value
Accident can generate irreversible reaction when the operating voltage of accumulator is less than minimum voltage limits value, so as to easily damage electric power storage
Pond.
In the conventional technology, to the fault diagnosis of accumulator generally using on-line monitoring.On-line monitoring is mainly based upon RS-
232（A kind of universal serial bus）Bus or RS-485 buses carry out electric quantity balancing to accumulator.However these methods can only use master
From formula system structure, data are collected with polling mode, without active negotiation ability.And electric quantity balancing effect is poor, can only realize
Electric quantity balancing between battery cell can not realize the electric quantity balancing between battery pack.
Invention content
The invention mainly solves the technical problem of providing a kind of battery management systems, can realize in battery pack group and electric
Electric quantity balancing between the group group of pond, and it is at low cost, reliability is high, can effectively promote electric quantity balancing effect.
In order to solve the above technical problems, one aspect of the present invention is：A kind of battery management system is provided, is used
In carrying out electric quantity balancing at least two groups of battery packs, each battery pack includes at least two battery cells, battery management system packet
Include central control unit and the battery management unit corresponding to each battery pack, central control unit and each battery management unit
Between connected by CAN bus, battery management unit to the battery cell in corresponding battery pack for carrying out electricity in group
Equilibrium, central control unit is for electric quantity balancing carrying out group to battery pack.
Wherein, battery management unit is used to acquire the status information of each battery cell in battery pack, and according to battery list
The status information of body determines that the battery cell of electric quantity balancing need to be carried out, and the battery that the battery cell for controlling electricity high is low to electricity
Monomer carries out electric quantity balancing in group.
Wherein, status information includes at least one kind in voltage value, current value and temperature value.
Wherein, central control unit is used to obtain total state of each battery pack from battery management unit by CAN bus
Information, and determined that according to total status information of battery pack the battery pack of electric quantity balancing need to be carried out, and the battery pack for controlling electricity high
Electric quantity balancing the battery pack low between electricity carries out group.
Wherein, battery management unit includes the first microcontroller, the first transformer, the first triode, the first capacitance, second
Capacitance, third capacitance, quantity at least two first switch group corresponding with the battery cell in battery pack and at least two second
Switching group, the first transformer include primary coil and secondary coil, the both ends of primary coil of the first transformer respectively with the first capacitance
Both ends connect, and are connect by corresponding first switch group with the two poles of the earth of each battery cell, the secondary coil of the first transformer
Both ends of the both ends respectively with the second capacitance are connect, and are connect by corresponding second switch group with the two poles of the earth of each battery cell,
First triode is series between multiple first switch groups and primary coil of the first transformer, and the first microcontroller connects electricity respectively
Pond group, first switch group and second switch group, and pass through the control terminal connection of the first triode of third capacitance connection；It is micro- first
Controller collects the status information of each battery cell in battery pack, and determines to need to carry out according to the status information of battery cell
During the battery cell of electric quantity balancing, the high corresponding first switch group of battery cell of the first microcontroller control electricity is connected to the
Primary coil of one transformer, and the corresponding second switch group of battery cell for controlling electricity low is connected to the by-pass of the first transformer
Circle, and pass through the first triode intermittent conduction of control, so that the high battery cell of electricity is in the first triode ON stage
Electric energy is stored in primary coil of the first transformer, and in the first triode dwell period, passes through the secondary coil of the first transformer
The battery cell charging low for electricity.
Wherein, battery management unit further comprises the first feedback unit, and the first feedback unit is series at the first transformer
Secondary coil and second switch group between, the first microcontroller connect the first feedback unit, and according to the first feedback unit feed back
Current information control the first duty ratio of the first triode so that by the conducting of first the first triode of Duty ratio control and
It closes.
Wherein, battery management unit further comprises the first diode, and the first Diode series are in the pair of the first transformer
Between coil and second switch group, pour in down a chimney to avoid the electric current of battery cell to the secondary coil of the first transformer.
Wherein, central control unit includes the second microcontroller, the second transformer, the second triode, the 4th capacitance, the 5th
Capacitance, the 6th capacitance, quantity at least two third switching group corresponding with battery pack and at least two the 4th switching groups, second becomes
Depressor includes primary coil and secondary coil, and the both ends of the both ends of primary coil of the second transformer respectively with the 4th capacitance are connect, and lead to
It crosses corresponding third switching group to connect with the two poles of the earth of each battery pack, the both ends of the secondary coil of the second transformer are electric with the 5th respectively
The both ends connection of appearance, and connect by corresponding 4th switching group with the two poles of the earth of each battery pack, the second triode is series at more
Between a third switching group and primary coil of the second transformer, the second microcontroller connects the first microcontroller respectively, third is opened
Pass group and the 4th switching group, and pass through the control terminal connection of the 6th the second triode of capacitance connection；Pass through in central control unit
CAN bus obtains total status information of each battery pack from battery management unit, and is determined according to total status information of battery pack
When need to carry out the battery pack of electric quantity balancing, the corresponding third switching group of the high battery pack of the second microcontroller control electricity connects
Primary coil of the second transformer is connected to, and corresponding 4th switching group of the battery pack for controlling electricity low is connected to the second transformer
Secondary coil, and pass through the second triode intermittent conduction of control, so that the high battery pack of electricity is in the second triode ON rank
Electric energy is stored in primary coil of the second transformer by section, and in the second triode dwell period, passes through the by-pass of the second transformer
Enclose the battery pack charging low for electricity.
Wherein, central control unit further comprises the second feedback unit, and the second feedback unit is series at the second transformer
Secondary coil and the 4th switching group between, the second microcontroller connect the second feedback unit, and according to the second feedback unit feed back
Current information control the second duty ratio of the second triode so that by the conducting of second the second triode of Duty ratio control and
It closes.
Wherein, central control unit further comprises the second diode, and the second Diode series are in the pair of the second transformer
Between coil and the 4th switching group, pour in down a chimney to avoid the electric current of battery pack to the secondary coil of the second transformer.
The beneficial effects of the invention are as follows：The situation of the prior art is different from, battery management unit of the invention passes through acquisition
The status information of each battery cell in battery pack determines that the battery of electric quantity balancing need to be carried out according to the status information of battery cell
Monomer, and the battery cell for the controlling electricity high battery cell low to electricity charges；Meanwhile central control unit passes through
CAN bus obtains total status information of each battery pack from battery management unit, and need are determined according to total status information of battery pack
The battery pack of electric quantity balancing is carried out, and the battery pack for the controlling electricity high battery pack low to electricity charges.Pass through above-mentioned side
Formula, battery management system of the invention can more accurately realize battery pack in the case where not influencing battery pack normal work
Group between group electric quantity balancing, and it is at low cost, reliability is high, can effectively promote electric quantity balancing effect.
Description of the drawings
Fig. 1 is the structure diagram that the battery management system of the present invention is connect with battery pack；
Fig. 2 is the structure diagram that the battery management unit in Fig. 1 is connect with battery pack；
Fig. 3 is the structure diagram that the central control unit in Fig. 1 is connect with battery pack.
Specific embodiment
Refering to Fig. 1, Fig. 1 is the structure diagram that the battery management system of the present invention is connect with battery pack.Battery management system
For system for carrying out electric quantity balancing at least two groups of battery pack M, each battery pack M includes at least two battery cell B.In this implementation
In example, battery pack M preferably includes 12 battery cell B1-B12, and battery cell B is preferably accumulator, certainly, in other implementations
Example in, battery cell B can also be other can charge and discharge battery.Battery management system includes at least two battery management units
11 and central control unit 12.Each battery management unit 11 correspond to each battery pack M, battery management unit 11 with it is corresponding
Battery pack M connections, are connected between central control unit 12 and each battery management unit 11 by CAN bus 13.Preferably, in
Centre control unit 12 is connect by the first CAN bus 131 and the second CAN bus 132 with each battery management unit 11.Certainly,
Central control unit 12 can also be connect by other buses with battery management unit 11.Wherein, battery management unit 11 is used for
Carry out electric quantity balancing in group to the battery cell B in corresponding battery pack M, central control unit 12 be used for battery pack M into
Electric quantity balancing between row group.
Battery management unit 11 is used to acquire the status information of each battery cell B in battery pack M, and according to battery cell
The status information of B determines that the battery cell B of electric quantity balancing need to be carried out, and the electricity that the battery cell B for controlling electricity high is low to electricity
Pond monomer B carries out electric quantity balancing in group.In the present embodiment, status information includes at least voltage value, current value and temperature value
In one kind.
Please also refer to Fig. 2, Fig. 2 is the structure diagram that the battery management unit in Fig. 1 is connect with battery pack.Cell tube
It manages unit 11 and includes the first microcontroller 111, the first transformer 112, the first feedback unit 113, the first diode D1, the one or three
Pole pipe Q1, the first capacitance C1, the second capacitance C2, third capacitance C3, quantity and the battery cell B corresponding first in battery pack M
Switching group 114 and second switch group 115.First transformer 112 includes primary coil Np1 and secondary coil Ns1, first switch group 114
At least 2, second switch group 115 is at least 2.Wherein, first switch group 114 includes first switch A1 and second switch
A2；Second switch group 115 includes the third switches of switch A3 and the 4th A4.First diode D1 is series at the first transformer 112
Between secondary coil Ns1 and second switch group 115, pour in down a chimney to avoid the electric current of battery cell B to the secondary coil of the first transformer 112
Ns1。
First microcontroller 111 is opened respectively with the first feedback unit 113, one end of third capacitance C3, battery pack M, first
Pass group 114 and second switch group 115 connect.First feedback unit 113 respectively with one end of the second capacitance C2, the first transformer
One end of 112 secondary coil Ns1 is connected with the side of the 4th of second switch group 115 the switch A4.The other end of second capacitance C2
The side with the third of the negative pole end of the first diode D1 and second switch group 115 switch A3 is connect respectively.First diode D1
Positive terminal and the first transformer 112 secondary coil Ns1 the other end connection.The third switch A3's of second switch group 115 is another
Side is connected with the positive terminal of respective battery monomer B；The 4th switch opposite side of A4 and respective battery list of second switch group 115
The negative pole end connection of body B.
One end of primary coil Np1 of first transformer 112 respectively with one end of the first capacitance C1 and first switch group 114
The side connection of first switch A1.The other end of primary coil Np1 of first transformer 112 other end with the first capacitance C1 respectively
It is connected with the first pin of the first triode Q1.The second pin of first triode Q1 is connected with the other end of third capacitance C3.
The third pin of first triode Q1 is connected with the side of the second switch A2 of first switch group 114.The of first switch group 114
The opposite side of one switch A1 is connected with the positive terminal of respective battery monomer B.The opposite side of the second switch A2 of first switch group 114
It is connected with the negative pole end of respective battery monomer B.
In the present embodiment, the first triode Q1 is NMOS tube, and the first pin of the first triode Q1 is drains, the one or three
The second pin of pole pipe Q1 is grid, i.e. control terminal, and the third pin of the first triode Q1 is source electrode.
Central control unit 12 is used to obtain total shape of each battery pack M from battery management unit 11 by CAN bus 13
State information, and determine according to total status information of battery pack M to carry out the battery pack M of electric quantity balancing, and the electricity for controlling electricity high
Electric quantity balancing battery pack M low between electricity pond group M carries out group.
Please also refer to Fig. 3, Fig. 3 is the structure diagram that the central control unit in Fig. 1 is connect with battery pack.Center control
Unit 12 processed includes the second microcontroller 121, the second transformer 122, the second feedback unit 123, the second diode D2, the two or three
Pole pipe Q2, the 4th capacitance C4, the 5th capacitance C5, the 6th capacitance C6, quantity third switching group 124 corresponding with battery pack M and
Four switching groups 125.Second transformer 122 include primary coil Np2 and secondary coil Ns2, third switching group 124 be at least 2, the 4th
Switching group 125 is at least 2.Wherein, third switching group 124 includes the 5th switch E1 and the 6th switch E2；4th switching group 125
Including the 7th switch E3 and the 8th switch E4.The secondary coil Ns2 that second diode D2 is series at the second transformer 122 is opened with the 4th
Between pass group 125, pour in down a chimney to avoid the electric current of battery pack M to the secondary coil Ns2 of the second transformer 122.
Second microcontroller 121 is connect by CAN bus 13 with the first microcontroller 111 of battery management unit 11.
In the present embodiment, the second microcontroller 121 passes through the first CAN bus 131 and the second CAN bus 132 and the first microcontroller 111
Connection.Certainly, in other embodiments, the second microcontroller 121 can also be connected by other buses and the first microcontroller 111
It connects.
Second microcontroller 121 respectively with the second feedback unit 123, one end of the 6th capacitance C6, third switching group 124 and
4th switching group 125 connects.Second feedback unit 123 respectively with one end of the 5th capacitance C5, the secondary coil of the second transformer 122
One end of Ns2 is connected with the side of the 8th switch E4 of the 4th switching group 125.The other end of 5th capacitance C5 is respectively with the two or two
The side connection of the negative pole end of pole pipe D2 and the 7th switch E3 of the 4th switching group 125.The positive terminal of second diode D2 and
The other end connection of the secondary coil Ns2 of two transformers 122.The opposite side of 7th switch E3 of the 4th switching group 125 and corresponding
The positive terminal connection of battery pack M.The opposite side of the 8th switch E4 of 4th switching group 125 and the negative pole end of corresponding battery pack M
Connection.
One end of primary coil Np2 of second transformer 122 respectively with one end of the 4th capacitance C4 and third switching group 124
The side connection of 5th switch E1.The other end of primary coil Np2 of second transformer 122 other end with the 4th capacitance C4 respectively
It is connected with the first pin of the second triode Q2.The other end connection of the second pin and the 6th capacitance C6 of second triode Q2.
The third pin of second triode Q2 is connected with the side of the 6th of third switching group 124 the switch E2.The of third switching group 124
The opposite side of five switch E1 is connected with the positive terminal of battery pack M.The opposite side and battery of 6th switch E2 of third switching group 124
The negative pole end connection of group M.
In the present embodiment, the second triode Q2 is NMOS tube, and the first pin of the second triode Q2 is drains, the two or three
The second pin of pole pipe Q2 is grid, i.e. control terminal, and the third pin of the second triode Q2 is source electrode.
The operation principle of battery management system is illustrated with reference to embodiment.
When battery pack M does not carry out the electric quantity balancing between group in group, the first switch A1 of first switch group 114 and second
Switch A2, the third switch A3 and the 4th of second switch group 115 switchs A4, the 5th switch E1 and the 6th of third switching group 124
Switch E2 and the 7th switch E3 and the 8th switch E4 of the 4th switching group 125 are disconnected.
When battery pack M carries out electric quantity balancing in group：Each battery cell B in first microcontroller 111 acquisition battery pack M
Status information.First microcontroller 111 determines that the battery cell of electric quantity balancing need to be carried out according to the status information of battery cell B
B.It is electricity high battery cell B, the 12nd battery cell the B12 battery cell low for electricity such as to determine the first battery cell B1
B.First microcontroller 111 controls the first switch A1 and second switch of the corresponding first switch groups 114 of the first battery cell B1
A2 is closed；First microcontroller 111 control the corresponding second switch groups 115 of the 12nd battery cell B12 third switch A3 and
4th switch A4 is closed.The first microcontroller 111 exports the first duty ratio to third capacitance C3 simultaneously, the of the first duty ratio
The first triode Q1 is connected during one level, so that the first battery cell B1 stores electric energy in the first triode Q1 conducting phases
In primary coil Np1 of the first transformer 112；In the second electrical level of the first duty ratio, the first triode Q1 is not turned on, so that
In the first triode Q1 dwell periods, charged by the secondary coil Ns1 of the first transformer 112 for the 12nd battery cell B12.
In addition, the first transformer 112 charges for the 12nd battery cell B12 in 113 Real-time Feedback group of the first feedback unit
The current information that is fed back to the first microcontroller 111, the first microcontroller 111 according to the first feedback unit 113 of current information
The first duty ratio of the first triode Q1 is controlled, so that control the first transformer 112 output constant current is the 12nd battery
Monomer B12 charges.In the present embodiment, the first level of the first duty ratio is high level, and the second electrical level of the first duty ratio is
Low level.Certainly, in other embodiments, can also be needed the first level being set as low level, second electrical level according to control
For high level.
When electric quantity balancing between battery pack M carries out group：Second microcontroller 121 actively passes through the first CAN bus 131 in real time
The total status information or the first microcontroller of each battery pack M is obtained from the first microcontroller 111 with the second CAN bus 132
111 are actively in real time sent total status information of each battery pack M to by the first CAN bus 131 and the second CAN bus 132
Second microcontroller 121.Second microcontroller 121 determines that the electricity of electric quantity balancing need to be carried out according to total status information of battery pack M
Pond group M.It is the high battery pack M of electricity such as to determine the first battery pack M1, and N battery packs Mn is the low battery pack M of electricity.Second is micro-
Controller 121 controls the 5th switch E1 and the 6th switch E2 of the corresponding third switching groups 124 of the first battery pack M1 to be closed；Second
Microcontroller 121 controls the 7th switch E3 and the 8th switch E4 of corresponding 4th switching groups 125 of N battery packs Mn to be closed.Together
When the second microcontroller 121 output the second duty ratio to the 6th capacitance C6, the two or three pole in the first level of the second duty ratio
Pipe Q2 is connected, so that electric energy is stored in the second transformer 122 by the first battery pack M1 in the second triode Q2 conducting phases
Primary coil Np2；In the second electrical level of the second duty ratio, the second triode Q2 is not turned on, so that being closed in the second triode Q2
Stage is charged by the secondary coil Ns2 of the second transformer 122 for N battery packs Mn.
In addition, the second transformer 122 is the electric current of N battery packs Mn chargings between 123 Real-time Feedback group of the second feedback unit
Information is to the second microcontroller 121, current information control that the second microcontroller 121 is fed back according to the second feedback unit 123 the
The second duty ratio of two triode Q2, so that control the second transformer 122 output constant current charges for N battery packs Mn.
In the present embodiment, the first level of the second duty ratio is high level, and the second electrical level of the second duty ratio is low level.Certainly,
In other embodiments, it can also be needed the first level being set as low level according to control, second electrical level is high level.
In the present embodiment, the battery management system based on CAN bus 13, can be single by line real-time monitoring battery pack M
Electric quantity balancing between the group of electric quantity balancing and battery pack M in only group for realizing battery pack M can also realize the group of battery pack M simultaneously
Electric quantity balancing between the group of interior electric quantity balancing and battery pack M.CAN bus 13 is a kind of more host computer control local area network standards, has object
The features such as procotol of reason layer and data link layer, more host nodes, loss arbitration, good high reliability and expansion performance.It is based on
The battery management system of CAN bus 13 is capable of the carry out high current electric quantity balancing of continuous and effective, and can control battery cell B
And the whole service life of battery pack M.Battery can be reliably monitored online in the battery management system based on CAN bus 13 simultaneously
The working condition and health status of group M, convenient for the maintenance of battery pack M and guarantee operational safety, in the case of no thermal losses
It realizes larger electric quantity balancing, not only solves battery pack M and be reliably monitored online, also solve battery cell B and battery pack M
Between electric quantity balancing problem.
In conclusion the battery management unit of the present invention is by acquiring the status information of each battery cell in battery pack,
It is determined that the battery cell of electric quantity balancing need to be carried out, and the battery cell for controlling electricity high is to electricity according to the status information of battery cell
Low battery cell is measured to charge；Meanwhile central control unit obtains each battery by CAN bus from battery management unit
Total status information of group, determines that the battery pack of electric quantity balancing need to be carried out, and control electricity height according to total status information of battery pack
The battery pack battery pack low to electricity charge.By the above-mentioned means, the battery management system of the present invention can be in not shadow
More accurately realize in battery pack group the electric quantity balancing between group in the case of ringing battery pack normal work, and it is at low cost, can
By property height, electric quantity balancing effect can be effectively promoted.
The foregoing is merely the embodiment of the present invention, are not intended to limit the scope of the invention, every to utilize this hair
The equivalent structure or equivalent flow shift that bright specification and accompanying drawing content are made directly or indirectly is used in other relevant skills
Art field, is included within the scope of the present invention.
Claims (5)
1. a kind of battery management system, for carrying out electric quantity balancing at least two groups of battery packs, each battery pack is included extremely
Few two battery cells, which is characterized in that
The battery management system includes central control unit and the battery management unit corresponding to each battery pack, described
It is connected between central control unit and each battery management unit by CAN bus；
The battery management unit is used to acquire the status information of each battery cell in the battery pack, and according to described
The status information of battery cell determines that the battery cell of electric quantity balancing, and the battery cell for controlling electricity high need to be carried out
The battery cell low to electricity carries out electric quantity balancing in group, the status information include at least voltage value, current value and
One kind in temperature value；
The central control unit is used to obtain each battery pack from the battery management unit by the CAN bus
Total status information, and determine according to total status information of the battery pack to carry out the battery pack of electric quantity balancing, and control
Electric quantity balancing the high battery pack of the electricity battery pack low between electricity carries out group；
The battery management unit include the first microcontroller, the first transformer, the first triode, the first capacitance, the second capacitance,
Third capacitance, quantity at least two first switches group corresponding with the battery cell in the battery pack and at least two second is opened
Pass group, first transformer include primary coil and secondary coil, the both ends of primary coil of first transformer respectively with it is described
The both ends connection of first capacitance, and connect by the corresponding first switch group with the two poles of the earth of each battery cell, institute
It states both ends of the both ends of the secondary coil of the first transformer respectively with second capacitance to connect, and passes through corresponding described second and open
Pass group is connect with the two poles of the earth of each battery cell, first triode be series at the multiple first switch group with it is described
Between primary coil of first transformer, first microcontroller connects the battery pack, the first switch group and institute respectively
Second switch group is stated, and passes through the control terminal of the first triode described in the third capacitance connection；
The status information of each battery cell in the battery pack is collected, and according to described in first microcontroller
When the status information of battery cell determines to carry out the battery cell of electric quantity balancing, first microcontroller controls electricity
The corresponding first switch group of the high battery cell is connected to primary coil of first transformer, and control electricity low
The corresponding second switch group of the battery cell be connected to the secondary coil of first transformer, and pass through and control described first
Triode intermittent conduction, so that the high battery cell of electricity stores electric energy in the first triode ON stage
In primary coil of first transformer, and in the first triode dwell period, pass through the by-pass of first transformer
Enclose the battery cell charging low for electricity；
The central control unit include the second microcontroller, the second transformer, the second triode, the 4th capacitance, the 5th capacitance,
6th capacitance, quantity at least two third switching group corresponding with the battery pack and at least two the 4th switching groups, described
Two transformers include primary coil and secondary coil, the both ends of primary coil of second transformer respectively with the 4th capacitance two
End connection, and connect by the corresponding third switching group with the two poles of the earth of each battery pack, second transformer
Both ends of the both ends of secondary coil respectively with the 5th capacitance are connect, and by corresponding 4th switching group with it is each described
The two poles of the earth connection of battery pack, second triode are series at the former line of the multiple third switching group and second transformer
Between circle, second microcontroller connects first microcontroller, the third switching group and the 4th switch respectively
Group, and pass through the control terminal of the second triode described in the 6th capacitance connection；
The total of each battery pack is obtained from the battery management unit by the CAN bus in the central control unit
Status information, and when determining to carry out the battery pack of electric quantity balancing according to total status information of the battery pack, described
The high corresponding third switching group of the battery pack of two microcontrollers control electricity is connected to the original of second transformer
Coil, and corresponding 4th switching group of the battery pack for controlling electricity low is connected to the secondary coil of second transformer, and
By controlling the second triode intermittent conduction, so that the high battery pack of electricity is in second triode ON
Electric energy is stored in primary coil of second transformer by the stage, and in the second triode dwell period, passes through described
The battery pack charging low for electricity of the secondary coil of two transformers.
2. battery management system according to claim 1, which is characterized in that the battery management unit further comprises
One feedback unit, first feedback unit are series between the secondary coil of first transformer and the second switch group,
First microcontroller connects first feedback unit, and is controlled according to the current information that first feedback unit is fed back
First duty ratio of first triode, so as to pass through the conducting of the first triode and pass described in first Duty ratio control
It closes.
3. battery management system according to claim 2, which is characterized in that the battery management unit further comprises
One diode, first Diode series are between the secondary coil of first transformer and the second switch group, to keep away
The electric current for exempting from the battery cell pours in down a chimney to the secondary coil of first transformer.
4. battery management system according to claim 1, which is characterized in that the central control unit further comprises
Two feedback units, second feedback unit are series between the secondary coil of second transformer and the 4th switching group,
Second microcontroller connects second feedback unit, and is controlled according to the current information that second feedback unit is fed back
Second duty ratio of second triode, so as to pass through the conducting of the second triode and pass described in second Duty ratio control
It closes.
5. battery management system according to claim 4, which is characterized in that the central control unit further comprises
Two diodes, second Diode series are between the secondary coil of second transformer and the 4th switching group, to keep away
The electric current for exempting from the battery pack pours in down a chimney to the secondary coil of second transformer.
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| CN201410150791.6A CN105098845B (en) | 2014-04-15 | 2014-04-15 | Battery management system |
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| CN201410150791.6A CN105098845B (en) | 2014-04-15 | 2014-04-15 | Battery management system |
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| CN105098845B true CN105098845B (en) | 2018-06-26 |
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| CN105552459B (en) * | 2016-01-26 | 2018-05-25 | 宁波海伯集团有限公司 | Power battery pack structure |
| CN110323802B (en) * | 2019-06-06 | 2021-02-12 | 北京中宸泓昌科技有限公司 | Charging equalization device and method of energy storage system |
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|---|---|---|---|---|
| CN102208822A (en) * | 2010-03-29 | 2011-10-05 | 三洋电机株式会社 | Power supply device and vehicle provided with the same |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| CN103066665A (en) * | 2013-01-18 | 2013-04-24 | 同济大学 | Active balancing circuit of power Li-ion battery module and balancing method thereof |
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| KR100451637B1 (en) * | 2002-06-18 | 2004-10-08 | 오세광 | A Management System for the Rechargeable Battery |
| CN203896002U (en) * | 2014-04-15 | 2014-10-22 | 东莞钜威新能源有限公司 | Battery management system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102208822A (en) * | 2010-03-29 | 2011-10-05 | 三洋电机株式会社 | Power supply device and vehicle provided with the same |
| CN102222957A (en) * | 2011-06-21 | 2011-10-19 | 清华大学深圳研究生院 | Automatic battery capacity equalization circuit and implementing method thereof |
| CN103066665A (en) * | 2013-01-18 | 2013-04-24 | 同济大学 | Active balancing circuit of power Li-ion battery module and balancing method thereof |
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