CN203896002U - Battery management system - Google Patents
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- CN203896002U CN203896002U CN201420182153.8U CN201420182153U CN203896002U CN 203896002 U CN203896002 U CN 203896002U CN 201420182153 U CN201420182153 U CN 201420182153U CN 203896002 U CN203896002 U CN 203896002U
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- 239000000178 monomer Substances 0.000 abstract description 6
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- 239000003990 capacitor Substances 0.000 description 20
- 238000006243 chemical reaction Methods 0.000 description 5
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- 238000005516 engineering process Methods 0.000 description 3
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
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Abstract
The utility model discloses a battery management system for carry out the electric quantity equilibrium to at least two sets of group batteries, each group battery includes two at least battery monomers, battery management system includes central control unit and the battery management unit who corresponds to each group battery, through CAN bus connection between central control unit and each battery management unit, battery management unit is used for carrying out the internal electric quantity equilibrium to the battery monomer in the group battery that corresponds, central control unit is used for carrying out the group electric quantity equilibrium to the group battery. In this way, the utility model discloses a battery management system can realize that the group of group internal electric quantity of group battery is balanced and realize simultaneously that the intergroup electric quantity of group battery is balanced, effectively promotes the balanced effect of electric quantity.
Description
Technical field
The utility model relates to battery management field, particularly relates to a kind of battery management system.
Background technology
In existing battery technology field, storage battery because of be a kind ofly power conveniently, safe and reliable DC energy source is widely used in every field.Storage battery can be that chemical energy stores by electric energy conversion, can change chemical energy into electric energy in use.Yet because storage battery is a kind of chemical reaction equipment, its inner chemical reaction is generally difficult to discover in time, the defect in routine use often needs long-term and uses and just can display frequently.Moreover, the chemical characteristic of storage battery determines that the scope of its operating voltage has strict restriction, when the operating voltage of storage battery can produce security incident during higher than ceiling voltage limits value, when the operating voltage of storage battery can produce irreversible reaction during lower than minimum voltage limits value, thereby easily damage storage battery.
In conventional art, the failure diagnosis of storage battery is generally adopted to on-line monitoring.On-line monitoring is mainly based on RS-232(universal serial bus) bus or RS-485 bus carry out electric quantity balancing to storage battery.Yet these methods can only adopt master-slave system structure, with polling mode, collect data, do not there is the initiatively coordination ability.And electric quantity balancing weak effect, can only realize the electric quantity balancing between battery cell, cannot realize the electric quantity balancing between battery pack.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of battery management system, can realize the electric quantity balancing in battery pack group and between battery pack group, and cost is low, reliability is high, can effectively promote electric quantity balancing effect.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of battery management system is provided, for at least two Battery pack groups are carried out to electric quantity balancing, each battery pack comprises at least two battery cells, battery management system comprises central control unit and corresponding to the battery management unit of each battery pack, between central control unit and each battery management unit, by CAN bus, be connected, battery management unit is for organizing interior electric quantity balancing to the battery cell in corresponding battery pack, central control unit is for electric quantity balancing between battery pack is organized.
Wherein, battery management unit is for gathering the state information of each battery cell in battery pack, and according to the state information of battery cell, determine and need carry out the battery cell of electric quantity balancing, and control the battery cell that electric weight is high the low battery cell of electric weight is organized to interior electric quantity balancing.
Wherein, state information at least comprises a kind of in magnitude of voltage, current value and temperature value.
Wherein, central control unit is for obtaining total state information of each battery pack from battery management unit by CAN bus, and according to total state information of battery pack, determine and need carry out the battery pack of electric quantity balancing, and control battery pack that electric weight is high the low battery pack of electric weight is organized between electric quantity balancing.
Wherein, battery management unit comprises the first microcontroller, the first transformer, the first triode, the first electric capacity, the second electric capacity, the 3rd electric capacity, at least two the first switches set and at least two second switch groups that quantity is corresponding with battery cell in battery pack, the first transformer comprises primary coil and secondary coil, the two ends of primary coil of the first transformer are connected with the two ends of the first electric capacity respectively, and be connected with the two poles of the earth of each battery cell by the first switches set of correspondence, the two ends of the secondary coil of the first transformer are connected with the two ends of the second electric capacity respectively, and be connected with the two poles of the earth of each battery cell by corresponding second switch group, the first triode is series between a plurality of the first switches set and primary coil of the first transformer, the first microcontroller connects respectively battery pack, the first switches set and second switch group, and connect by the control end that the 3rd electric capacity connects the first triode, at the first microcontroller, collect the state information of each battery cell in battery pack, and in the time of need carrying out the battery cell of electric quantity balancing according to the state information of battery cell is definite, the first switches set corresponding to battery cell that the first microprocessor controls electric weight is high is connected to primary coil of the first transformer, and control the secondary coil that second switch group corresponding to battery cell that electric weight is low is connected to the first transformer, and by controlling the first triode intermittent conduction, so that the high battery cell of electric weight the first triode conducting phase by electrical power storage the primary coil at the first transformer, and at the first triode dwell period, secondary coil by the first transformer is that the battery cell that electric weight is low charges.
Wherein, battery management unit further comprises the first feedback unit, the first feedback unit is series between the secondary coil and second switch group of the first transformer, the first microcontroller connects the first feedback unit, and control the first duty ratio of the first triode according to the current information of the first feedback unit feedback, so that the conducting by first Duty ratio control the first triode and closing.
Wherein, battery management unit further comprises the first diode, and the first diode is series between the secondary coil and second switch group of the first transformer, to avoid the electric current of battery cell to pour in down a chimney to the secondary coil of the first transformer.
Wherein, central control unit comprises the second microcontroller, the second transformer, the second triode, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, at least two the 3rd switches set and at least two the 4th switches set that quantity is corresponding with battery pack, the second transformer comprises primary coil and secondary coil, the two ends of primary coil of the second transformer are connected with the two ends of the 4th electric capacity respectively, and be connected with the two poles of the earth of each battery pack by the 3rd switches set of correspondence, the two ends of the secondary coil of the second transformer are connected with the two ends of the 5th electric capacity respectively, and be connected with the two poles of the earth of each battery pack by the 4th switches set of correspondence, the second triode is series between a plurality of the 3rd switches set and primary coil of the second transformer, the second microcontroller connects respectively the first microcontroller, the 3rd switches set and the 4th switches set, and connect by the control end that the 6th electric capacity connects the second triode, at central control unit, by CAN bus, from battery management unit, obtain total state information of each battery pack, and in the time of need carrying out the battery pack of electric quantity balancing according to total state information of battery pack is definite, described the 3rd switches set corresponding to battery pack that the second microprocessor controls electric weight is high is connected to primary coil of the second transformer, and control the secondary coil that the 4th switches set corresponding to battery pack that electric weight is low is connected to the second transformer, and by controlling the second triode intermittent conduction, so that the high battery pack of electric weight the second triode conducting phase by electrical power storage the primary coil at the second transformer, and at the second triode dwell period, secondary coil by the second transformer is the batteries charging that electric weight is low.
Wherein, central control unit further comprises the second feedback unit, the second feedback unit is series between the secondary coil and the 4th switches set of the second transformer, the second microcontroller connects the second feedback unit, and control the second duty ratio of the second triode according to the current information of the second feedback unit feedback, so that the conducting by second Duty ratio control the second triode and closing.
Wherein, central control unit further comprises the second diode, and the second diode is series between the secondary coil and the 4th switches set of the second transformer, to avoid the electric current of battery pack to pour in down a chimney to the secondary coil of the second transformer.
The beneficial effects of the utility model are: the situation that is different from prior art, battery management unit of the present utility model is by gathering the state information of each battery cell in battery pack, according to the state information of battery cell, determine and need carry out the battery cell of electric quantity balancing, and control the battery cell that electric weight is high the low battery cell of electric weight is charged; Simultaneously, central control unit obtains total state information of each battery pack from battery management unit by CAN bus, according to total state information of battery pack, determine and need carry out the battery pack of electric quantity balancing, and control the battery pack that electric weight is high the low battery pack of electric weight is charged.By the way, battery management system of the present utility model can be realized more accurately electric quantity balancing in battery pack group and between group in the situation that not affecting the normal work of battery pack, and cost is low, reliability is high, can effectively promote electric quantity balancing effect.
Accompanying drawing explanation
Fig. 1 is the structural representation that battery management system of the present utility model is connected with battery pack;
Fig. 2 is the structural representation that the battery management unit in Fig. 1 is connected with battery pack;
Fig. 3 is the structural representation that the central control unit in Fig. 1 is connected with battery pack.
Embodiment
Consult Fig. 1, Fig. 1 is the structural representation that battery management system of the present utility model is connected with battery pack.Battery management system is for carrying out electric quantity balancing at least two Battery pack group M, and each battery pack M comprises at least two battery cell B.In the present embodiment, battery pack M preferably includes 12 battery cell B1-B12, and battery cell B is preferably storage battery, and certainly, in other embodiments, battery cell B can also be other batteries that can discharge and recharge.Battery management system comprises at least two battery management units 11 and central control unit 12.Each battery management unit 11 is corresponding to each battery pack M, and battery management unit 11 connects with corresponding battery pack M, between central control unit 12 and each battery management unit 11, by CAN bus 13, is connected.Preferably, central control unit 12 is connected with each battery management unit 11 with the 2nd CAN bus 132 by a CAN bus 131.Certainly, central control unit 12 can also be connected with battery management unit 11 by other buses.Wherein, battery management unit 11 is organized interior electric quantity balancing for the battery cell B in corresponding battery pack M, and central control unit 12 is for electric quantity balancing between battery pack M is organized.
Battery management unit 11 is for gathering the state information of each battery cell B in battery pack M, and according to the state information of battery cell B, determine the battery cell B that need carry out electric quantity balancing, and control the battery cell B that electric weight is high the low battery cell B of electric weight is organized to interior electric quantity balancing.In the present embodiment, state information at least comprises a kind of in magnitude of voltage, current value and temperature value.
Please also refer to Fig. 2, Fig. 2 is the structural representation that the battery management unit in Fig. 1 is connected with battery pack.Battery management unit 11 comprises the first switches set 114 and the second switch group 115 that the first microcontroller 111, the first transformer 112, the first feedback unit 113, the first diode D1, the first triode Q1, the first capacitor C 1, the second capacitor C 2, the 3rd capacitor C 3, quantity are corresponding with battery cell B in battery pack M.The first transformer 112 comprises primary coil Np1 and secondary coil Ns1, and the first switches set 114 is at least 2, and second switch group 115 is at least 2.Wherein, the first switches set 114 comprises the first switch A1 and second switch A2; Second switch group 115 comprises the 3rd switch A3 and the 4th switch A4.The first diode D1 is series between the secondary coil Ns1 and second switch group 115 of the first transformer 112, to avoid the electric current of battery cell B to pour in down a chimney to the secondary coil Ns1 of the first transformer 112.
The first microcontroller 111 is connected with second switch group 115 with one end, battery pack M, first switches set 114 of the first feedback unit 113, the 3rd capacitor C 3 respectively.The first feedback unit 113 respectively with one end of the second capacitor C 2, a side of one end of the secondary coil Ns1 of the first transformer 112 and the 4th switch A4 of second switch group 115 be connected.The other end of the second capacitor C 2 is connected with a side of the negative pole end of the first diode D1 and the 3rd switch A3 of second switch group 115 respectively.The positive terminal of the first diode D1 is connected with the other end of the secondary coil Ns1 of the first transformer 112.The opposite side of the 3rd switch A3 of second switch group 115 is connected with the positive terminal of respective battery monomers B; The opposite side of the 4th switch A4 of second switch group 115 is connected with the negative pole end of respective battery monomers B.
One end of primary coil Np1 of the first transformer 112 is connected with a side of one end of the first capacitor C 1 and the first switch A1 of the first switches set 114 respectively.The other end of primary coil Np1 of the first transformer 112 is connected with the first pin of the first triode Q1 with the other end of the first capacitor C 1 respectively.The second pin of the first triode Q1 is connected with the other end of the 3rd capacitor C 3.The three-prong of the first triode Q1 is connected with a side of the second switch A2 of the first switches set 114.The opposite side of the first switch A1 of the first switches set 114 is connected with the positive terminal of respective battery monomers B.The opposite side of the second switch A2 of the first switches set 114 is connected with the negative pole end of respective battery monomers B.
In the present embodiment, the first triode Q1 is NMOS pipe, and the first pin of the first triode Q1 is drain electrode, and the second pin of the first triode Q1 is grid, i.e. control end, and the three-prong of the first triode Q1 is source electrode.
Central control unit 12 is for obtaining total state information of each battery pack M from battery management unit 11 by CAN bus 13, and according to total state information of battery pack M, determine and need carry out the battery pack M of electric quantity balancing, and control battery pack M that electric weight is high the low battery pack M of electric weight is organized between electric quantity balancing.
Please also refer to Fig. 3, Fig. 3 is the structural representation that the central control unit in Fig. 1 is connected with battery pack.Central control unit 12 comprises the second microcontroller 121, the second transformer 122, the second feedback unit 123, the second diode D2, the second triode Q2, the 4th capacitor C 4, the 5th capacitor C 5, the 6th capacitor C 6, quantity three switches set 124 and four switches set 125 corresponding with battery pack M.The second transformer 122 comprises primary coil Np2 and secondary coil Ns2, and the 3rd switches set 124 is at least 2, and the 4th switches set 125 is at least 2.Wherein, the 3rd switches set 124 comprises the 5th switch E1 and the 6th switch E2; The 4th switches set 125 comprises minion pass E3 and the 8th switch E4.The second diode D2 is series between the secondary coil Ns2 and the 4th switches set 125 of the second transformer 122, to avoid the electric current of battery pack M to pour in down a chimney to the secondary coil Ns2 of the second transformer 122.
The second microcontroller 121 is connected with the first microcontroller 111 of battery management unit 11 by CAN bus 13.In the present embodiment, the second microcontroller 121 is connected with the first microcontroller 111 with the 2nd CAN bus 132 by a CAN bus 131.Certainly, in other embodiments, the second microcontroller 121 can also be connected with the first microcontroller 111 by other buses.
The second microcontroller 121 is connected with one end, the 3rd switches set 124 and the 4th switches set 125 of the second feedback unit 123, the 6th capacitor C 6 respectively.The second feedback unit 123 respectively with one end of the 5th capacitor C 5, a side of one end of the secondary coil Ns2 of the second transformer 122 and the 8th switch E4 of the 4th switches set 125 be connected.The other end of the 5th capacitor C 5 is connected with a side of the negative pole end of the second diode D2 and the minion of the 4th switches set 125 pass E3 respectively.The positive terminal of the second diode D2 is connected with the other end of the secondary coil Ns2 of the second transformer 122.The opposite side that the minion of the 4th switches set 125 is closed E3 is connected with the positive terminal of corresponding battery pack M.The opposite side of the 8th switch E4 of the 4th switches set 125 is connected with the negative pole end of corresponding battery pack M.
One end of primary coil Np2 of the second transformer 122 is connected with a side of one end of the 4th capacitor C 4 and the 5th switch E1 of the 3rd switches set 124 respectively.The other end of primary coil Np2 of the second transformer 122 is connected with the first pin of the second triode Q2 with the other end of the 4th capacitor C 4 respectively.The second pin of the second triode Q2 is connected with the other end of the 6th capacitor C 6.A side of the 6th switch E2 of the three-prong of the second triode Q2 and the 3rd switches set 124 is connected.The opposite side of the 5th switch E1 of the 3rd switches set 124 is connected with the positive terminal of battery pack M.The opposite side of the 6th switch E2 of the 3rd switches set 124 is connected with the negative pole end of battery pack M.
In the present embodiment, the second triode Q2 is NMOS pipe, and the first pin of the second triode Q2 is drain electrode, and the second pin of the second triode Q2 is grid, i.e. control end, and the three-prong of the second triode Q2 is source electrode.
Below in conjunction with embodiment, the operation principle of battery management system is described.
In battery pack M organizes and between group, during electric quantity balancing, the minion of the 5th switch E1 of the 3rd switch A3 of the first switch A1 of the first switches set 114 and second switch A2, second switch group 115 and the 4th switch A4, the 3rd switches set 124 and the 6th switch E2 and the 4th switches set 125 is not closed E3 and the 8th switch E4 disconnects.
When battery pack M organizes interior electric quantity balancing: the first microcontroller 111 gathers the state information of each battery cell B in battery pack M.The first microcontroller 111 is determined the battery cell B that need carry out electric quantity balancing according to the state information of battery cell B.As determined, the first battery cell B1 is the battery cell B that electric weight is high, and the 12 battery cell B12 is the battery cell B that electric weight is low.The first switch A1 and second switch A2 that the first microcontroller 111 is controlled the first switches set 114 that the first battery cell B1 is corresponding are closed; The 3rd switch A3 and the 4th switch A4 that the first microcontroller 111 is controlled the second switch group 115 that the 12 battery cell B12 is corresponding are closed.The first microcontroller 111 is exported the first duty ratio to the three capacitor C 3 simultaneously, the first triode Q1 conducting when the first level of the first duty ratio so that the first battery cell B1 the first triode Q1 conducting phase by electrical power storage primary coil Np1 at the first transformer 112; The first not conducting of triode Q1 when the second electrical level of the first duty ratio, so that at the first triode Q1 dwell period, the secondary coil Ns1 by the first transformer 112 is that the 12 battery cell B12 charges.
In addition, in the first feedback unit 113 Real-time Feedback groups, the first transformer 112 is current information to the first microcontroller 111 of the 12 battery cell B12 charging, the first microcontroller 111 is controlled the first duty ratio of the first triode Q1 according to the current information of the first feedback unit 113 feedbacks, so that control the first transformer 112 output constant currents, be the 12 battery cell B12 charging.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 need to be set to low level by the first level according to controlling, second electrical level is high level.
Between battery pack M organizes during electric quantity balancing: the second microcontroller 121 initiatively in real time obtains total state information of each battery pack M by a CAN bus 131 and the 2nd CAN bus 132 from the first microcontroller 111, or the first microcontroller 111 actives send total state information of each battery pack M to second microcontroller 121 by a CAN bus 131 and the 2nd CAN bus 132 in real time.The second microcontroller 121 is determined the battery pack M that need carry out electric quantity balancing according to total state information of battery pack M.As determined, the first battery pack M1 is the battery pack M that electric weight is high, and N battery pack Mn is the battery pack M that electric weight is low.The 5th switch E1 and the 6th switch E2 that the second microcontroller 121 is controlled the 3rd switches set 124 that the first battery pack M1 is corresponding are closed; Minion pass E3 and the 8th switch E4 that the second microcontroller 121 is controlled the 4th switches set 125 that N battery pack Mn is corresponding are closed.The second microcontroller 121 is exported the second duty ratio to the six capacitor C 6 simultaneously, the second triode Q2 conducting when the first level of the second duty ratio so that the first battery pack M1 the second triode Q2 conducting phase by electrical power storage primary coil Np2 at the second transformer 122; The second not conducting of triode Q2 when the second electrical level of the second duty ratio, so that at the second triode Q2 dwell period, the secondary coil Ns2 by the second transformer 122 is that N battery pack Mn charges.
In addition, between the second feedback unit 123 Real-time Feedback groups, the second transformer 122 is current information to the second microcontroller 121 of N battery pack Mn charging, the second microcontroller 121 is controlled the second duty ratio of the second triode Q2 according to the current information of the second feedback unit 123 feedbacks, so that control the second transformer 122 output constant currents, be N battery pack Mn charging.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, can also need to be set to low level by the first level according to controlling, second electrical level is high level.
In the present embodiment, battery management system based on CAN bus 13, by on line real-time monitoring battery pack M, can realize separately electric quantity balancing between the interior electric quantity balancing of group of battery pack M and the group of battery pack M, also can realize electric quantity balancing between the interior electric quantity balancing of group of battery pack M and the group of battery pack M simultaneously.The features such as CAN bus 13 is a kind of many host computer control local area network standards, has the procotol of physical layer and data link layer, and many host nodes, harmless arbitration, high reliability and expansion performance are good.Battery management system based on CAN bus 13 can continuous and effective to carry out large-current electric amount balanced, and can control the whole service life of battery cell B and battery pack M.Operating state and the health status of the battery management system reliably on-line monitoring battery pack M of while based on CAN bus 13, be convenient to the maintenance of battery pack M and ensure security of operation, in the situation that there is no thermal losses, realize larger electric quantity balancing, not only solve the reliable on-line monitoring of battery pack M, also solved the electric quantity balancing problem between battery cell B and battery pack M.
In sum, battery management unit of the present utility model is by gathering the state information of each battery cell in battery pack, according to the state information of battery cell, determine and need carry out the battery cell of electric quantity balancing, and control the battery cell that electric weight is high the low battery cell of electric weight is charged; Simultaneously, central control unit obtains total state information of each battery pack from battery management unit by CAN bus, according to total state information of battery pack, determine and need carry out the battery pack of electric quantity balancing, and control the battery pack that electric weight is high the low battery pack of electric weight is charged.By the way, battery management system of the present utility model can be realized more accurately electric quantity balancing in battery pack group and between group in the situation that not affecting the normal work of battery pack, and cost is low, reliability is high, can effectively promote electric quantity balancing effect.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model specification and accompanying drawing content to do; or be directly or indirectly used in other relevant technical fields, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. a battery management system, for at least two Battery pack groups are carried out to electric quantity balancing, described in each, battery pack comprises at least two battery cells, it is characterized in that, described battery management system comprises central control unit and corresponding to the battery management unit of battery pack described in each, described central control unit with described in each, between battery management unit, by CAN bus, be connected, described battery management unit is for organizing interior electric quantity balancing to the battery cell in corresponding described battery pack, described central control unit is for electric quantity balancing between described battery pack is organized.
2. battery management system according to claim 1, it is characterized in that, described battery management unit is for gathering in described battery pack the state information of battery cell described in each, and according to the state information of described battery cell, determine the described battery cell that need carry out electric quantity balancing, and control the described battery cell that electric weight is high the low described battery cell of electric weight is organized to interior electric quantity balancing.
3. battery management system according to claim 2, is characterized in that, described state information at least comprises a kind of in magnitude of voltage, current value and temperature value.
4. battery management system according to claim 2, it is characterized in that, described central control unit is for obtaining total state information of battery pack described in each from described battery management unit by described CAN bus, and according to total state information of described battery pack, determine the described battery pack need carry out electric quantity balancing, and control described battery pack that electric weight is high the low described battery pack of electric weight is organized between electric quantity balancing.
5. battery management system according to claim 4, it is characterized in that, described battery management unit comprises the first microcontroller, the first transformer, the first triode, the first electric capacity, the second electric capacity, the 3rd electric capacity, at least two the first switches set and at least two second switch groups that quantity is corresponding with battery cell in described battery pack, described the first transformer comprises primary coil and secondary coil, the two ends of primary coil of described the first transformer are connected with the two ends of described the first electric capacity respectively, and be connected with the two poles of the earth of battery cell described in each by described first switches set of correspondence, the two ends of the secondary coil of described the first transformer are connected with the two ends of described the second electric capacity respectively, and be connected with the two poles of the earth of battery cell described in each by the described second switch group of correspondence, described the first triode is series between described a plurality of the first switches set and primary coil of described the first transformer, described the first microcontroller connects respectively described battery pack, described the first switches set and described second switch group, and the control end that connects described the first triode by described the 3rd electric capacity connects,
The state information of battery cell described in described the first microcontroller collects in described battery pack each, and in the time of need carrying out the described battery cell of electric quantity balancing according to the state information of described battery cell is definite, described the first switches set corresponding to described battery cell that described the first microprocessor controls electric weight is high is connected to primary coil of described the first transformer, and control the secondary coil that second switch group corresponding to described battery cell that electric weight is low is connected to described the first transformer, and by controlling described the first triode intermittent conduction, so that the high described battery cell of electric weight described the first triode conducting phase by electrical power storage the primary coil at described the first transformer, and at described the first triode dwell period, secondary coil by described the first transformer is that the described battery cell that electric weight is low charges.
6. battery management system according to claim 5, it is characterized in that, described battery management unit further comprises the first feedback unit, described the first feedback unit is series between the secondary coil and described second switch group of described the first transformer, described the first microcontroller connects described the first feedback unit, and control the first duty ratio of described the first triode according to the current information of described the first feedback unit feedback, so that the conducting by the first triode described in described the first Duty ratio control and closing.
7. battery management system according to claim 6, it is characterized in that, described battery management unit further comprises the first diode, described the first diode is series between the secondary coil and described second switch group of described the first transformer, to avoid the electric current of described battery cell to pour in down a chimney to the secondary coil of described the first transformer.
8. battery management system according to claim 5, it is characterized in that, described central control unit comprises the second microcontroller, the second transformer, the second triode, the 4th electric capacity, the 5th electric capacity, the 6th electric capacity, at least two the 3rd switches set and at least two the 4th switches set that quantity is corresponding with described battery pack, described the second transformer comprises primary coil and secondary coil, the two ends of primary coil of described the second transformer are connected with the two ends of described the 4th electric capacity respectively, and be connected with the two poles of the earth of battery pack described in each by described the 3rd switches set of correspondence, the two ends of the secondary coil of described the second transformer are connected with the two ends of described the 5th electric capacity respectively, and be connected with the two poles of the earth of battery pack described in each by described the 4th switches set of correspondence, described the second triode is series between described a plurality of the 3rd switches set and primary coil of described the second transformer, described the second microcontroller connects respectively described the first microcontroller, described the 3rd switches set and described the 4th switches set, and the control end that connects described the second triode by described the 6th electric capacity connects,
At described central control unit, by described CAN bus, from described battery management unit, obtain total state information of battery pack described in each, and in the time of need carrying out the described battery pack of electric quantity balancing according to total state information of described battery pack is definite, described the 3rd switches set corresponding to described battery pack that described the second microprocessor controls electric weight is high is connected to primary coil of described the second transformer, and control the secondary coil that the 4th switches set corresponding to described battery pack that electric weight is low is connected to described the second transformer, and by controlling described the second triode intermittent conduction, so that the high described battery pack of electric weight described the second triode conducting phase by electrical power storage the primary coil at described the second transformer, and at described the second triode dwell period, secondary coil by described the second transformer is the described batteries charging that electric weight is low.
9. battery management system according to claim 8, it is characterized in that, described central control unit further comprises the second feedback unit, described the second feedback unit is series between the secondary coil and described the 4th switches set of described the second transformer, described the second microcontroller connects described the second feedback unit, and control the second duty ratio of described the second triode according to the current information of described the second feedback unit feedback, so that the conducting by the second triode described in described the second Duty ratio control and closing.
10. battery management system according to claim 9, it is characterized in that, described central control unit further comprises the second diode, described the second diode is series between the secondary coil and described the 4th switches set of described the second transformer, to avoid the electric current of described battery pack to pour in down a chimney to the secondary coil of described the second transformer.
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| CN201420182153.8U CN203896002U (en) | 2014-04-15 | 2014-04-15 | Battery management system |
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| CN201420182153.8U CN203896002U (en) | 2014-04-15 | 2014-04-15 | Battery management system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104659870A (en) * | 2014-10-29 | 2015-05-27 | 无锡中星微电子有限公司 | Battery balance management circuit and system |
| CN105098845A (en) * | 2014-04-15 | 2015-11-25 | 东莞钜威新能源有限公司 | Battery management system |
| CN107863798A (en) * | 2017-06-19 | 2018-03-30 | 广州汇安科技有限公司 | A kind of highly reliable adaptable intelligent movable power supplies and system |
-
2014
- 2014-04-15 CN CN201420182153.8U patent/CN203896002U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105098845A (en) * | 2014-04-15 | 2015-11-25 | 东莞钜威新能源有限公司 | Battery management system |
| CN104659870A (en) * | 2014-10-29 | 2015-05-27 | 无锡中星微电子有限公司 | Battery balance management circuit and system |
| CN107863798A (en) * | 2017-06-19 | 2018-03-30 | 广州汇安科技有限公司 | A kind of highly reliable adaptable intelligent movable power supplies and system |
| CN107863798B (en) * | 2017-06-19 | 2019-05-07 | 广州汇安科技有限公司 | A kind of intelligent movable power supplies and system |
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Effective date of registration: 20160222 Address after: 523808, Guangdong District, Songshan hi tech Industrial Development Zone, Dongguan, seven industrial North Road, 1 force science and technology center, 3 floor, B District Patentee after: Dongguan Powerwise Technology Co., Ltd. Address before: 523808 productivity building, Songshan science and Technology Industrial Park, Guangdong, Dongguan Province, room 401-403 Patentee before: Dongguan PowerWise New Energy Co., Ltd. |
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