CN204578140U - A kind of equalizing circuit based on normal shock bi-directional DC-DC module - Google Patents
A kind of equalizing circuit based on normal shock bi-directional DC-DC module Download PDFInfo
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- CN204578140U CN204578140U CN201520192606.XU CN201520192606U CN204578140U CN 204578140 U CN204578140 U CN 204578140U CN 201520192606 U CN201520192606 U CN 201520192606U CN 204578140 U CN204578140 U CN 204578140U
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- 230000035939 shock Effects 0.000 title claims abstract description 86
- 230000005669 field effect Effects 0.000 claims description 42
- 239000003990 capacitor Substances 0.000 claims description 24
- 238000004146 energy storage Methods 0.000 claims description 16
- 230000001681 protective effect Effects 0.000 claims description 8
- 230000017525 heat dissipation Effects 0.000 abstract description 4
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
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Abstract
The utility model discloses a kind of equalizing circuit based on normal shock bi-directional DC-DC module, it comprises the battery pack comprising multiple battery cell, voltage acquisition module, switching over module, controller and at least one normal shock bi-directional DC-DC module, described voltage acquisition module, switching over module and normal shock bi-directional DC-DC module are all connected with controller, described multiple battery cell is all connected with voltage acquisition module, one end of described normal shock bi-directional DC-DC module is connected with battery cell by switching over module, the other end of described normal shock bi-directional DC-DC module is connected with battery pack.There is not heat dissipation problem in equalizing circuit of the present utility model, but also has that euqalizing current is large, balancing speed is fast, capacity usage ratio is high, structure is simple, be easy to the advantages such as realization operation.The utility model can be widely used in battery balanced field as a kind of equalizing circuit based on normal shock bi-directional DC-DC module.
Description
Technical field
The utility model relates to equalizing circuit, particularly relates to a kind of equalizing circuit based on normal shock bi-directional DC-DC module.
Background technology
In the actual use of battery, the voltage of battery cell and capacity often cannot meet the demand of load, therefore often need by multiple battery cell through series and parallel in groups after use.But, different battery cell in manufacturing process due to the limitation of production technology, often there is the difference (capacity has minute differences) using initial condition, in addition in use, different condition of work (difference as temperature and degree of aging) also will cause, between battery cell, performance exists difference.After carrying out repeatedly discharge and recharge, if these difference are without control, to expand gradually, form short-board effect simultaneously, namely the capacity that capacity relative is low is more and more less, difference between electricity also can be increasing, thus cause overcharging or excessively putting of battery cell, greatly affects performance and the life-span of whole Battery pack.Therefore, need to carry out the battery balanced electricity difference effectively reducing different battery cell and in use occur.
Current existing balanced way is mainly divided into two kinds, passive equilibrium and active equalization.Described passive balanced way refers to, by sealing in resistance constant power consumers (load) in circuit, the form of the excess energy of battery cell high for electricity by heat is dissipated.But passive balanced way has the following four obvious defects in aspect: 1, because unnecessary energy is dissipated in the form of heat by load, consequent heat will bring very large problem to heat radiation, the overheated inconsistency that also can increase battery on the contrary of battery simultaneously, forms vicious circle; 2, the euqalizing current of passive equilibrium is less, and therefore time for balance is longer, also can only be applied in small-capacity cells; 3, the energy owing to being consumed cannot be utilized by system, causes the waste on energy, causes whole system capacity usage ratio low.Described active equalization mode refers to, by the energy-storage travelling wave tube such as inductance, electric capacity, is mutually shifted by energy between battery, thus completes equalization function.Because energy does not dissipate in the form of heat, therefore compared with traditional passive equilibrium, active equalization has euqalizing current and greatly, there is not heat dissipation problem, capacity usage ratio advantages of higher.Described active equalization mode is divided into distributed and centralized.Described distributed active equalization mode refers to, energy mutually flows between battery cell and battery cell.Common distributed active equalization method is, energy-storage travelling wave tube (electric capacity or inductance) is accessed between every two joint adjacent cell, energy-storage travelling wave tube is connected with switch, when detecting that between battery cell, voltage there are differences, closed all switches, make to carry out equilibrium successively by energy-storage travelling wave tube between adjacent battery cell successively.Distributed active equalization circuit has the defect of following two aspects: 1, because equilibrium will be carried out at all adjacent cell monomer parts, therefore euqalizing current is little, and balancing speed is slow; 2, because energy has carried out repeatedly transmitting between different battery cell, therefore energy loss is large, and capacity usage ratio is still comparatively low.
Utility model content
In order to solve the problems of the technologies described above, the purpose of this utility model is to provide a kind of equalizing circuit based on normal shock bi-directional DC-DC module.
The technical scheme that the utility model adopts is: a kind of equalizing circuit based on normal shock bi-directional DC-DC module, it comprises the battery pack comprising multiple battery cell, voltage acquisition module, switching over module, controller and at least one normal shock bi-directional DC-DC module, described voltage acquisition module, switching over module and normal shock bi-directional DC-DC module are all connected with controller, described multiple battery cell is all connected with voltage acquisition module, one end of described normal shock bi-directional DC-DC module is connected with battery cell by switching over module, the other end of described normal shock bi-directional DC-DC module is connected with battery pack.
Further, described normal shock bi-directional DC-DC module comprises normal shock transformer, the first field effect transistor, the second field effect transistor, the first diode, the second diode, the first electrochemical capacitor, the second electrochemical capacitor and energy storage inductor;
The source class in-phase end of described normal shock transformer is connected with the positive pole of battery pack, the source class out-phase end of described normal shock transformer is connected with the drain electrode of the first field effect transistor and the negative pole of the first diode respectively, the source electrode of described first field effect transistor is all connected with the negative pole of battery pack with the positive pole of the first diode, the grid of described first field effect transistor is connected with controller, and the positive pole of described first electrochemical capacitor and negative pole are connected with the positive pole of battery pack and negative pole respectively;
The secondary in-phase end of described normal shock transformer is connected with one end of energy storage inductor, the other end of described energy storage inductor is connected with the positive pole of the second electrochemical capacitor, the secondary out-phase end of described normal shock transformer is connected with the drain electrode of the second field effect transistor and the negative pole of the second diode respectively, the source electrode of described second field effect transistor is all connected with the negative pole of the second electrochemical capacitor with the positive pole of the second diode, and the positive pole of described second electrochemical capacitor and negative pole are connected with the positive pole of battery cell and negative pole respectively by switching over module.
Further; described normal shock bi-directional DC-DC module also comprises former limit switching tube active-clamp protective circuit; described former limit switching tube active-clamp protective circuit comprises the 3rd field effect transistor, the 3rd diode and electric capacity; the source class out-phase end of described normal shock transformer is connected with one end of electric capacity; the other end of described electric capacity is connected with the drain electrode of the 3rd field effect transistor and the negative pole of the 3rd diode respectively, and the source electrode of described 3rd field effect transistor is all connected with the negative pole of battery pack with the positive pole of the 3rd diode.
Further, described normal shock bi-directional DC-DC module is the normal shock bi-directional DC-DC module of modularized design.
The beneficial effects of the utility model are: equalizing circuit of the present utility model have employed voltage acquisition module, switching over module, controller and at least one normal shock bi-directional DC-DC module, and described normal shock bi-directional DC-DC model calling is between battery cell and battery pack, like this by normal shock bi-directional DC-DC module, energy just can two-way flow between battery cell and battery pack, thus reaches battery balanced effect.Can obtain thus, there is not heat dissipation problem in circuit of the present utility model, but also have that euqalizing current is large, balancing speed is fast, capacity usage ratio advantages of higher.In addition, because equalizing circuit of the present utility model adopts normal shock bi-directional DC-DC module, therefore, circuit of the present utility model also has the simple advantage with being easy to realization operation of structure.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, embodiment of the present utility model is described further:
Fig. 1 is a kind of equalizing circuit structured flowchart based on normal shock bi-directional DC-DC module of the utility model;
Fig. 2 is a kind of electronic circuit schematic based on normal shock bi-directional DC-DC module in the equalizing circuit of normal shock bi-directional DC-DC module of the utility model.
Embodiment
As shown in Figure 1, a kind of equalizing circuit based on normal shock bi-directional DC-DC module, it comprises the battery pack comprising multiple battery cell, voltage acquisition module, switching over module, controller and at least one normal shock bi-directional DC-DC module, described voltage acquisition module, switching over module and normal shock bi-directional DC-DC module are all connected with controller, described multiple battery cell is all connected with voltage acquisition module, one end of described normal shock bi-directional DC-DC module is connected with battery cell by switching over module, the other end of described normal shock bi-directional DC-DC module is connected with battery pack.
Be further used as preferred embodiment, described normal shock bi-directional DC-DC module comprises normal shock transformer, the first field effect transistor, the second field effect transistor, the first diode, the second diode, the first electrochemical capacitor, the second electrochemical capacitor and energy storage inductor;
The source class in-phase end of described normal shock transformer is connected with the positive pole of battery pack, the source class out-phase end of described normal shock transformer is connected with the drain electrode of the first field effect transistor and the negative pole of the first diode respectively, the source electrode of described first field effect transistor is all connected with the negative pole of battery pack with the positive pole of the first diode, the grid of described first field effect transistor is connected with controller, and the positive pole of described first electrochemical capacitor and negative pole are connected with the positive pole of battery pack and negative pole respectively;
The secondary in-phase end of described normal shock transformer is connected with one end of energy storage inductor, the other end of described energy storage inductor is connected with the positive pole of the second electrochemical capacitor, the secondary out-phase end of described normal shock transformer is connected with the drain electrode of the second field effect transistor and the negative pole of the second diode respectively, the source electrode of described second field effect transistor is all connected with the negative pole of the second electrochemical capacitor with the positive pole of the second diode, and the positive pole of described second electrochemical capacitor and negative pole are connected with the positive pole of battery cell and negative pole respectively by switching over module.
Be further used as preferred embodiment; described normal shock bi-directional DC-DC module also comprises former limit switching tube active-clamp protective circuit; described former limit switching tube active-clamp protective circuit comprises the 3rd field effect transistor, the 3rd diode and electric capacity; the source class out-phase end of described normal shock transformer is connected with one end of electric capacity; the other end of described electric capacity is connected with the drain electrode of the 3rd field effect transistor and the negative pole of the 3rd diode respectively, and the source electrode of described 3rd field effect transistor is all connected with the negative pole of battery pack with the positive pole of the 3rd diode.
A specific embodiment of the present utility model
A kind of equalizing circuit based on normal shock bi-directional DC-DC module, it comprises the battery pack, voltage acquisition module, switching over module, controller and at least one the normal shock bi-directional DC-DC module that comprise multiple battery cell, described voltage acquisition module, switching over module and normal shock bi-directional DC-DC module are all connected with controller, described multiple battery cell is all connected with voltage acquisition module, one end of described normal shock bi-directional DC-DC module is connected with battery cell by switching over module, and the other end of described normal shock bi-directional DC-DC module is connected with battery pack.
The operation principle of above-mentioned equalizing circuit is: the voltage of described voltage acquisition module to multiple battery cell gathers, then the multiple voltages collected are sent to controller, described controller according to obtain multiple voltage thus judge whether to need to carry out equilibrium to battery cell, when judging to need to carry out equilibrium to battery cell, controller just can carry out switching over by control switch handover module, make one end of normal shock bi-directional DC-DC module carry out balanced battery cell with needs to be electrically connected, then controller exports control signal and makes normal shock bi-directional DC-DC module work, such energy just can need to carry out two-way flow between balanced battery cell and battery pack, energy as the battery cell higher than average voltage flows into battery pack by normal shock bi-directional DC-DC module, or, the energy of battery pack is by the battery cell of normal shock bi-directional DC-DC module inflow lower than average voltage, thus realize battery balanced.Can obtain thus, battery balanced by adopting above-mentioned equalizing circuit to realize, not only there is not heat dissipation problem like this, but also have that euqalizing current is large, balancing speed is fast, capacity usage ratio advantages of higher.In addition because the utility model adopts normal shock bi-directional DC-DC module to realize, therefore circuit of the present utility model also have structure simple, be easy to the advantages such as realization operation.Further, by increasing the number of normal shock bi-directional DC-DC module, multichannel equilibrium can be realized.
As shown in Figure 2, described normal shock bi-directional DC-DC module comprises normal shock transformer T1, the first field effect transistor Q1, the second field effect transistor Q2, the first diode D1, the second diode D2, the first electrochemical capacitor C1, the second electrochemical capacitor C2 and energy storage inductor L1;
The source class in-phase end of described normal shock transformer T1 is connected with the positive pole of battery pack, the source class out-phase end of described normal shock transformer T1 is connected with the drain electrode of the first field effect transistor Q1 and the negative pole of the first diode D1 respectively, the source electrode of described first field effect transistor Q1 is all connected with the negative pole of battery pack with the positive pole of the first diode D1, the grid of described first field effect transistor Q1 is connected with controller, and the positive pole of described first electrochemical capacitor C1 and negative pole are connected with the positive pole of battery pack and negative pole respectively;
The secondary in-phase end of described normal shock transformer T1 is connected with one end of energy storage inductor L1, the other end of described energy storage inductor L1 is connected with the positive pole of the second electrochemical capacitor C2, the secondary out-phase end of described normal shock transformer T1 is connected with the drain electrode of the second field effect transistor Q2 and the negative pole of the second diode D2 respectively, the source electrode of described second field effect transistor Q2 is all connected with the negative pole of the second electrochemical capacitor C2 with the positive pole of the second diode D2, and the positive pole of described second electrochemical capacitor C2 and negative pole are connected with the positive pole of battery cell and negative pole respectively by switching over module.
In addition; for described normal shock bi-directional DC-DC module; it also comprises former limit switching tube active-clamp protective circuit; described former limit switching tube active-clamp protective circuit comprises the 3rd field effect transistor Q3, the 3rd diode D3 and electric capacity C3; the source class out-phase end of described normal shock transformer T1 is connected with one end of electric capacity C3; the other end of described electric capacity C3 is connected with the drain electrode of the 3rd field effect transistor Q3 and the negative pole of the 3rd diode D3 respectively, and the source electrode of described 3rd field effect transistor Q3 is all connected with the negative pole of battery pack with the positive pole of the 3rd diode D3.The grid of described second field effect transistor Q2 and the 3rd field effect transistor Q3 is all unsettled.
Preferably, described normal shock bi-directional DC-DC module is the normal shock bi-directional DC-DC module of modularized design.Described normal shock bi-directional DC-DC module adopts modularized design, to change or the increase of number reduces therefore, it is possible to be convenient to staff to normal shock bi-directional DC-DC module.
Finally it should be noted that, the utility model only relates to structural improvement, do not relate to the improvement on software approach, although the controller in the utility model relates to the content of control and signal transacting, but it all can adopt prior art means to realize, in data processing method, there is not any improvement, therefore, the utility model does not relate to the improvement in the methods such as data processing, does not namely relate to the improvement on any software.
More than that better enforcement of the present utility model is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to the utility model spirit, and these equivalent distortion or replacement are all included in the application's claim limited range.
Claims (4)
1. the equalizing circuit based on normal shock bi-directional DC-DC module, it is characterized in that: it comprises the battery pack comprising multiple battery cell, voltage acquisition module, switching over module, controller and at least one normal shock bi-directional DC-DC module, described voltage acquisition module, switching over module and normal shock bi-directional DC-DC module are all connected with controller, described multiple battery cell is all connected with voltage acquisition module, one end of described normal shock bi-directional DC-DC module is connected with battery cell by switching over module, the other end of described normal shock bi-directional DC-DC module is connected with battery pack.
2. a kind of equalizing circuit based on normal shock bi-directional DC-DC module according to claim 1, is characterized in that: described normal shock bi-directional DC-DC module comprises normal shock transformer, the first field effect transistor, the second field effect transistor, the first diode, the second diode, the first electrochemical capacitor, the second electrochemical capacitor and energy storage inductor;
The source class in-phase end of described normal shock transformer is connected with the positive pole of battery pack, the source class out-phase end of described normal shock transformer is connected with the drain electrode of the first field effect transistor and the negative pole of the first diode respectively, the source electrode of described first field effect transistor is all connected with the negative pole of battery pack with the positive pole of the first diode, the grid of described first field effect transistor is connected with controller, and the positive pole of described first electrochemical capacitor and negative pole are connected with the positive pole of battery pack and negative pole respectively;
The secondary in-phase end of described normal shock transformer is connected with one end of energy storage inductor, the other end of described energy storage inductor is connected with the positive pole of the second electrochemical capacitor, the secondary out-phase end of described normal shock transformer is connected with the drain electrode of the second field effect transistor and the negative pole of the second diode respectively, the source electrode of described second field effect transistor is all connected with the negative pole of the second electrochemical capacitor with the positive pole of the second diode, and the positive pole of described second electrochemical capacitor and negative pole are connected with the positive pole of battery cell and negative pole respectively by switching over module.
3. a kind of equalizing circuit based on normal shock bi-directional DC-DC module according to claim 2, it is characterized in that: described normal shock bi-directional DC-DC module also comprises former limit switching tube active-clamp protective circuit, described former limit switching tube active-clamp protective circuit comprises the 3rd field effect transistor, 3rd diode and electric capacity, the source class out-phase end of described normal shock transformer is connected with one end of electric capacity, the other end of described electric capacity is connected with the drain electrode of the 3rd field effect transistor and the negative pole of the 3rd diode respectively, the source electrode of described 3rd field effect transistor is all connected with the negative pole of battery pack with the positive pole of the 3rd diode.
4. a kind of equalizing circuit based on normal shock bi-directional DC-DC module according to any one of claim 1-3, is characterized in that: described normal shock bi-directional DC-DC module is the normal shock bi-directional DC-DC module of modularized design.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520192606.XU CN204578140U (en) | 2015-03-31 | 2015-03-31 | A kind of equalizing circuit based on normal shock bi-directional DC-DC module |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520192606.XU CN204578140U (en) | 2015-03-31 | 2015-03-31 | A kind of equalizing circuit based on normal shock bi-directional DC-DC module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110048614A (en) * | 2019-05-31 | 2019-07-23 | 重庆大学 | The forward converter and its working method of isolated equalizing circuit based on bus type equalising network |
| CN110323794A (en) * | 2019-02-01 | 2019-10-11 | 成都汇云创科技有限公司 | A kind of control method and circuit of active equalization |
-
2015
- 2015-03-31 CN CN201520192606.XU patent/CN204578140U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110323794A (en) * | 2019-02-01 | 2019-10-11 | 成都汇云创科技有限公司 | A kind of control method and circuit of active equalization |
| CN110048614A (en) * | 2019-05-31 | 2019-07-23 | 重庆大学 | The forward converter and its working method of isolated equalizing circuit based on bus type equalising network |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 |