CN203933086U - A kind of battery balanced device - Google Patents
A kind of battery balanced device Download PDFInfo
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- CN203933086U CN203933086U CN201420249503.8U CN201420249503U CN203933086U CN 203933086 U CN203933086 U CN 203933086U CN 201420249503 U CN201420249503 U CN 201420249503U CN 203933086 U CN203933086 U CN 203933086U
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- battery balanced
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- 238000004804 winding Methods 0.000 claims abstract description 16
- 230000008878 coupling Effects 0.000 claims abstract description 10
- 238000010168 coupling process Methods 0.000 claims abstract description 10
- 238000005859 coupling reaction Methods 0.000 claims abstract description 10
- 230000001360 synchronised effect Effects 0.000 claims description 6
- 230000003245 working effect Effects 0.000 claims description 2
- 230000008901 benefit Effects 0.000 abstract description 3
- 239000000178 monomer Substances 0.000 description 10
- 238000000034 method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 3
- 230000009466 transformation Effects 0.000 description 3
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 2
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052744 lithium Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The utility model provides a kind of battery balanced device, and this battery balanced device comprises many group balance modules, battery module; Described balance module comprises transformer unit and many group power converter cells; Described battery module comprises many group cells, organizes between cell more and is connected in series; Described converter is connected one to one with cell; Described transformer unit primary side comprises multipair armature winding; The a pair of armature winding of the corresponding connection of described power converter cells, according to transformer unit, coupling discharges and recharges cell described power converter cells; The battery balanced device providing by the utility model has been realized the electric voltage equalization between the corresponding cell of different balance modules.Have volume little, combo is flexible, is convenient to centralized control, advantage that cost is low.
Description
Technical field
The utility model relates to new energy field, espespecially a kind of can be for the battery balanced device in battery active equalization system.
Background technology
In the electric automobile of new energy field, wind power generation, solar power system, there is energy storage device, in energy storage device, include a large amount of energy storage devices, common are storage battery (as lead-acid battery, lithium battery), super capacitor etc.
The used for electric vehicle dynamic lithium battery group of take is example, and power battery pack is composed in series by organizing cell more, and every group of cell is formed in parallel by several cells.Because bulk properties between battery cell there are differences, after discharging and recharging, several times can cause the imbalance of the performance such as capacity, voltage between every group of cell, finally cause decay and the lost of life of battery pack overall permanence.When reality is used for this reason, all need to increase supporting equalizing system, with solving the equalization problem of cell in battery pack.Active equalization system is representing the development trend of industry at present, and passive equalizing system is eliminated gradually.
Utility model content
The utility model provides a kind of battery balanced device, and object is to solve the equalization problem of cell in battery pack, and the battery balanced device that the utility model provides is for can be for the balance module circuit in battery active equalization system, specific as follows:
The utility model provides a kind of battery balanced device, and described battery balanced device comprises: organize balance module, battery module more; Described balance module comprises transformer unit and many group power converter cells; Described battery module comprises many group cells, organizes between cell more and is connected in series; Described converter is connected one to one with cell; Described transformer unit primary side comprises multipair armature winding; Described power converter cells is corresponding connects a pair of armature winding, and coupling discharges and recharges cell according to transformer unit.
In technique scheme, the secondary side output terminal of described transformer unit is connected with equalizing bus bar.
In technique scheme, described many group balance modules also connect a driver module, by this driver module, control described many group power converter cells synchronous workings.
In technique scheme, described driver module is PWM unit, in order to export PWMA, PWMB and PWMGND signal.
In technique scheme, described transformer unit is multi-source driver transformer.
Useful technique effect of the present utility model is: the battery balanced device providing by the utility model has been realized the electric voltage equalization between the corresponding cell of different balance modules.Have volume little, combo is flexible, is convenient to centralized control, advantage that cost is low.
Accompanying drawing explanation
Fig. 1 is active equalization system composition frame chart;
Fig. 2 is balanced unit circuit theory diagrams;
Fig. 3 is balance module multi-source driver transformer equivalent circuit diagram.
Embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with execution mode and accompanying drawing, the utility model is described in further details.At this, exemplary embodiment of the present utility model and explanation thereof are used for explaining the utility model, but not as to restriction of the present utility model.
The utility model embodiment provides a kind of battery balanced device, below in conjunction with accompanying drawing, the utility model is elaborated.
Please refer to shown in Fig. 1, this battery balanced device specifically comprises following part: organize balance module, battery module more; Described balance module comprises many group power converter cells and transformer unit; Described battery module comprises many group cells, organizes between cell more and is connected in series; Described converter is connected one to one with cell; Described transformer unit primary side comprises multipair armature winding; Described power converter cells is corresponding connects a pair of armature winding, and coupling discharges and recharges cell according to transformer unit.
In such scheme, battery balanced device is to be in series by a plurality of balance modules and corresponding battery cell, is illustrated in fig. 1 shown below.For convenience of description, suppose that equalizing system comprises n balance module, corresponding 2 cells of each balance module, in practical application, 1 balance module can corresponding 2 above monomers, and each monomer in figure can be by one group of cell parallel with one another composition.When the converter in balance module is worked, can realize by the DC/DC two-way changing of transformer primary the electric voltage equalization of inner cell.Realize the electric voltage equalization between a plurality of cells, with this, solved cell imbalance of the performance such as capacity, voltage between a plurality of cells in battery pack, extended the life-span of battery pack integral body, lowered the loss of battery.
In the utility model one preferred embodiment, a plurality of balance modules can also be according to such scheme, a corresponding equalizing bus bar, this bus also can be carried out DC/AC two-way changing by the coupling of transformer, thereby realizes the electric voltage equalization of the cell between different balance modules.Make the voltage between a plurality of battery pack that a plurality of balance modules are corresponding maintain balance, further extend the life-span of more massive battery pack integral body, lower the loss of battery.
In the utility model one preferred embodiment, PWMA, PWMB, PWMGND are the common drive signal of all balance modules, can control the power converter cells synchronous working of all balance modules inside.When the converter in balance module is worked, can realize by the DC/DC two-way changing of transformer primary the electric voltage equalization of inner cell.Meanwhile, the secondary side output terminal BUSA/BUSB connection equalizing bus bar due to transformer, can carry out DC/AC two-way changing by the coupling of transformer by this bus, thereby realize the electric voltage equalization of the cell between different balance modules.
For making technique scheme more clear, please refer to shown in Fig. 2 the circuit theory diagrams that Fig. 2 is balance module.
In upper figure, balance module inside comprises the T1 of winding high frequency transformer more than, also can be called multi-source driver transformer, T1 has 2n armature winding (N1A/N1B, N2A/N2B that the number of turn is identical,-----NnA/NnB) He 1 secondary winding N0, YiT1Wei circle, can be divided into circuit primary side and primary side two parts.
Wherein, primary side can be divided into n power converter cells, and (armature winding N1A/N1B as corresponding in power converter cells 1, power converter cells adopts and recommends transformation topology 1 corresponding 1 pair of armature winding of power converter cells, so there is 1 pair of armature winding.This is the feature of sort circuit topology.) each unit all adopts and recommend transformation topology, externally connects a battery cell.Take unit 1 as example, be described as follows:
Unit 1 comprises following main element: armature winding N1A, the N1B of transformer, and switch mosfet pipe Q1A, Q1B, power filtering capacitor C1, resistance R1A, R1B, grid bleeder resistance R1C, R1D, every straight coupling capacitance C1A, C1B, insurance F1.B1+/B1-is for connecting the both positive and negative polarity of cell, PWMA/PWMB is that external driving signal, PWNGND are for driving signal with reference to ground, this is communicated with B1-with reference to ground, there has is this with reference to ground, drive signal PWMA/PWMB just can for each unit provides, drive signal by capacitance, and drive signal positive and negative two-way, be convenient to opening and turn-offing action of reliable control switch pipe.
Wherein, primary side comprises: in Fig. 2, primary side BUSA/BUSB is equalizing bus bar, for realizing the equilibrium of the monomer battery voltage between different units.
In such scheme, it is specific as follows that it realizes balanced principle:
According to the operation principle of push-pull topology, it is reverse driving signal PWMA and PWMB, and duty ratio is adjustable.Driving under the effect of signal PWMA/PWMB, the converter of all unit is synchronous working all, because magnetic core of transformer shares, it is multi-source driver transformer working method, like this by the coupling of transformer, the high unit of two-way DC/DC conversion, monomer voltage can be carried out and will, to the low unit output electric energy of monomer voltage, finally the balance of voltage between inside modules cell can be realized.
For further illustrating balanced operation principle, please refer to shown in Fig. 3 the equivalent circuit diagram that Fig. 3 is converter.In figure, V1, V2, Vn are respectively the terminal voltage of cell 1, cell 2, cell n, and Va represents the average voltage of cell, the comprehensive internal resistance of Ri1, Ri2, Rin difference representation transformation device unit and cell.Coupling by multi-source driver transformer, a current path has been set up in equivalence between different monomer voltages, if monomer voltage is higher than average voltage, by output current (electric discharge), if monomer voltage is lower than average voltage, by input current (charging), finally can realize the balance of voltage between monomer.
For example:
If V1>Va, cell 1 electric discharge, discharging current: I1=(V1-Va)/Ri1;
If V1<Va, cell 1 charging, charging current: I1=(Va-V1)/Ri1;
Simultaneously, when converter synchronous working, on the secondary winding of transformer, having synchronous AC voltage produces, voltage magnitude is directly proportional with the average voltage of the corresponding all monomers of this balance module, when the equalizing bus bar of different balance modules is interconnected, by the coupling of bus, can realize two-way DC/AC conversion, finally realize the balance of voltage between the corresponding cell of disparate modules.Principle is to above-mentioned similar.
Only the above person, is only specific embodiment of the utility model, can not limit the scope that the utility model is implemented with it.Therefore the amplification of its equivalent assemblies, dwindle, replace, or the equivalent variations of making according to the utility model scope of patent protection and modification, all still belong to the covering scope of the utility model claims.
Claims (5)
1. a battery balanced device, is characterized in that, described battery balanced device comprises: organize balance module, battery module more;
Described balance module comprises transformer unit and many group power converter cells;
Described battery module comprises many group cells, organizes between cell more and is connected in series;
Described converter is connected one to one with cell; Described transformer unit primary side comprises multipair armature winding;
Described power converter cells is corresponding connects a pair of armature winding, and coupling discharges and recharges cell according to transformer unit.
2. battery balanced device according to claim 1, is characterized in that, the secondary side output terminal of described transformer unit is connected with equalizing bus bar.
3. battery balanced device according to claim 1, is characterized in that, described many group balance modules also connect a driver module, by this driver module, controls described many group power converter cells synchronous workings.
4. battery balanced device according to claim 3, is characterized in that, described driver module is PWM unit, in order to export PWMA, PWMB and PWMGND signal.
5. battery balanced device according to claim 1, is characterized in that, described transformer unit is multi-source driver transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249503.8U CN203933086U (en) | 2014-05-15 | 2014-05-15 | A kind of battery balanced device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420249503.8U CN203933086U (en) | 2014-05-15 | 2014-05-15 | A kind of battery balanced device |
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| CN203933086U true CN203933086U (en) | 2014-11-05 |
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| CN201420249503.8U Expired - Lifetime CN203933086U (en) | 2014-05-15 | 2014-05-15 | A kind of battery balanced device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359670A (en) * | 2017-08-21 | 2017-11-17 | 上海空间电源研究所 | A kind of space high-voltage batteries bidirectional equalization circuit and its bidirectional equalization method |
| CN108110859A (en) * | 2018-01-25 | 2018-06-01 | 成都特隆美储能技术有限公司 | In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system |
-
2014
- 2014-05-15 CN CN201420249503.8U patent/CN203933086U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107359670A (en) * | 2017-08-21 | 2017-11-17 | 上海空间电源研究所 | A kind of space high-voltage batteries bidirectional equalization circuit and its bidirectional equalization method |
| CN107359670B (en) * | 2017-08-21 | 2020-06-09 | 上海空间电源研究所 | Bidirectional equalization circuit and bidirectional equalization method for space high-voltage storage battery pack |
| CN108110859A (en) * | 2018-01-25 | 2018-06-01 | 成都特隆美储能技术有限公司 | In a kind of battery pack with Redundancy Design and Homogeneity between groups manage system |
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Granted publication date: 20141105 |
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| CX01 | Expiry of patent term |