CN204905967U - Harmless balanced management system of high -power group battery of modularization - Google Patents
Harmless balanced management system of high -power group battery of modularization Download PDFInfo
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- CN204905967U CN204905967U CN201520714004.6U CN201520714004U CN204905967U CN 204905967 U CN204905967 U CN 204905967U CN 201520714004 U CN201520714004 U CN 201520714004U CN 204905967 U CN204905967 U CN 204905967U
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Abstract
The utility model provides a harmless balanced management system of high -power group battery of modularization, including balanced charging and discharging module, be connected with the group battery to to needing balanced battery cell to charge or discharge in the group battery, battery parameter acquisition module, every battery cell's battery information in the collection group battery, microprocessor for the battery information of receiving battery parameter acquisition module, the state of charge to each battery cell judges according to the battery information of gathering, if surpass and predetermine the threshold values, then need to confirm balanced battery cell and need the balanced time according to the battery information of gathering to it charges or discharges the balanced battery cell of needs to control balanced charging and discharging module with this. The utility model discloses a mode of centralized management realizes the flow of energy between battery cell, accomplishes the function of balanced management, through balanced charging and discharging module to the charging, discharging or stewing that to implement developments online harmless balanced of battery cell, accomplish the harmless balanced management of group battery.
Description
Technical field
The utility model relates to electric automobile or battery management system field, large power energy storage power station, is specifically related to a kind of non-dissipative equalizing management system of modular high-power battery pack.
Background technology
Electric automobile has the features such as zero discharge, no pollution, low noise, becomes the vehicles that China from now on greatly develops.Lithium battery, due to characteristics such as its high power density, monomer voltage height, is conventional electric powered motor source.In dynamic lithium battery group, the inconsistency of cell, can reduce the effective energy of lithium battery group, affects the performance of electric automobile.Therefore reliable, the efficient lithium battery group balanced management system of research, reduce the otherness of cell in battery pack, ensure reliability and the fail safe of dynamic lithium battery management system, extend the useful life of dynamic lithium battery group, have great meaning to electric automobile.Lithium battery group balanced management system is the important component part of battery management system, its objective is and ensure that the state-of-charge of cell in battery pack is identical, to prevent in use procedure owing to overcharging, cross the infringement that cell of being rivals in a contest causes, reduce the performance of lithium battery group.
At present, conventional lithium battery balanced way is divided into two kinds, and one damages equilibrium, is also called passive equilibrium, usually adopts the method with cell parallel resistance, bypasses unnecessary electric energy.Damage balanced way and also there is the shortcomings such as energy consumption is large, efficiency is low, balancing speed is slow, heat radiation is difficult simultaneously.Another kind is non-dissipative equalizing, be also called active equalization, usual employing switched inductors, capacitance method, with inductance and electric capacity as energy-storage travelling wave tube, switching circuit controls as the selection of each cell of battery pack, but the method balancing speed is slow, efficiency is low, and control switch complex structural designs, system reliability is not high.
Utility model content
For solving the problems of the technologies described above, the utility model provides a kind of non-dissipative equalizing management system of modular high-power battery pack, and design cost non-dissipative equalizing that is low, that can realize battery pack fast and efficiently manages.
For achieving the above object, the technical solution of the utility model is as follows: a kind of non-dissipative equalizing management system of modular high-power battery pack, and described battery pack has n the cell be sequentially connected in series, and it is characterized in that: it comprises
Balance charge/discharge module, is connected with battery pack, with to needing balanced cell to carry out charge or discharge in battery pack;
Battery parameter acquisition module, gathers the battery information of each cell in battery pack;
Microprocessor, for battery pack enter charging, electric discharge or static condition time, receive the battery information of described battery parameter acquisition module, judge according to the state-of-charge of the battery information collected to each cell, if exceed pre-set threshold value, then determine need balanced cell and need the balanced time according to the battery information that collects, and control balance charge/discharge module with this and carry out charge or discharge to needing balanced cell.
In a preferred embodiment of the present utility model, comprise described balance charge/discharge module further and comprise electrical connection successively and overall switch arrays, bi-directional DC-DC converter and the ultracapacitor C forming major loop with described battery pack,
Switch arrays, are controlled by described microprocessor, for selecting cell each in battery pack;
Ultracapacitor: for carrying out charge or discharge to selected cell;
Bi-directional DC-DC converter, is controlled by described microprocessor, for mating the voltage between the ultracapacitor cell balanced with needs.
In a preferred embodiment of the present utility model, comprise described battery information further and at least comprise all cell state-of-charges, all monomer battery voltages, all cell electric currents, and all cell temperature.
In a preferred embodiment of the present utility model, comprise described microprocessor further and comprise memory cell, for storing the list of the state-of-charge of all cells-need time for balance.
In a preferred embodiment of the present utility model, when the state-of-charge comprising microprocessor judges cell further exceeds pre-set threshold value, corresponding state-of-charge reads the time of corresponding needs equilibrium from described memory cell.
In a preferred embodiment of the present utility model, comprise according to battery behavior test of many times further, obtain cell and be issued in phase induced current, relevant temperature condition the time that concrete state-of-charge needs, obtain the list of the state-of-charge of described cell-need time for balance with this.
In a preferred embodiment of the present utility model, comprise it further and also comprise heat treatment module, be controlled by microprocessor, for carrying out cooling process when the temperature of cell exceedes preset value to cell.
In a preferred embodiment of the present utility model, the charging pre-set threshold value comprising state-of-charge is further 80 ~ 95% of the full electric state of batteries monomer battery, and electric discharge pre-set threshold value is 10 ~ 30% of the full electric state of batteries monomer battery.
In a preferred embodiment of the present utility model, comprise described switch arrays further and have single-pole double-throw switch (SPDT) and n the single knife switch be connected with n cell respectively, two conversion terminations of described single-pole double-throw switch (SPDT) are connected with all odd numbers cells of n cell, all even numbers cells respectively.
In a preferred embodiment of the present utility model, comprise described balance charge/discharge module further and also comprise two diodes be connected on major loop, be respectively the first diode Q1 and the second diode Q2, the positive pole of the first diode Q1 connects bi-directional DC-DC converter, its negative pole connects the positive pole of ultracapacitor C, the positive pole of the second diode Q2 connects the negative pole of ultracapacitor C, and its negative pole connects bi-directional DC-DC converter.
The beneficial effects of the utility model are: the non-dissipative equalizing management system of a kind of modular high-power battery pack of the present invention, the flowing of energy between cell is realized by the mode of centralized management, complete the function of balanced management, by balance charge/discharge module to the charging of cell, electric discharge or leave standstill and implement dynamically online non-dissipative equalizing, simultaneously necessary in real time control, complete the non-dissipative equalizing management of battery pack, improve dependability and the fail safe of modular high-power battery pack, have that structural design is simple, the feature of low cost of manufacture simultaneously.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in embodiment of the present invention technology, be briefly described to the accompanying drawing used required in the description of embodiment technology below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the theory diagram of the balanced management system of the preferred embodiment of the present invention;
The circuit diagram of the balance charge/discharge module of preferred embodiment of the present invention during Fig. 2.
Wherein: 10-battery pack, 11-cell, 20-switch arrays, 30-bi-directional DC-DC converter.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment as shown in Figure 1, a kind of non-dissipative equalizing management system of modular high-power battery pack is disclosed in the present embodiment, described battery pack has n the cell be sequentially connected in series, it is balanced management object of the present utility model, it is connected with management of charging and discharging, it is charged normally, discharges, non-dissipative equalizing management system is started in charge and discharge process, management maintenance carried out to the battery pack in charge and discharge process, to prevent in charge and discharge process owing to overcharging, cross battery pack of being rivals in a contest and damage.
Non-dissipative equalizing management system comprises,
Balance charge/discharge module, is connected with battery pack 10, with to needing balanced cell 11 to carry out charge or discharge in battery pack 10;
Battery parameter acquisition module, gather the battery information of each cell 11 in battery pack, wherein battery information at least comprises all cell state-of-charges, all monomer battery voltages, all cell electric currents, and all cell temperature;
Microprocessor, for battery pack enter charging, electric discharge or static condition time, receive the battery information of described battery parameter acquisition module, judge according to the state-of-charge of the battery information collected to each cell, if exceed pre-set threshold value, then determine need balanced cell and need the balanced time according to the battery information that collects, and control balance charge/discharge module with this and carry out charge or discharge to needing balanced cell;
Heat treatment module, is controlled by microprocessor, for carrying out cooling process when the temperature of cell exceedes preset value to cell;
Carry out exchanges data by digital signal processor and balance charge/discharge module, battery parameter acquisition module, heat treatment module, digital signal processor completes transfer of data by CAN and micro-process.
Based on the above-mentioned composition structure of management system, its process completing the management of battery pack non-dissipative equalizing is as follows: the battery information of all cells of collection when charging, electric discharge, static condition that battery parameter acquisition module is real-time, wherein digital signal processor transfers to microprocessor by CAN, microprocessor after simulated battery information is carried out digitlization conversion
Judge according to the state-of-charge of the battery information collected to each cell, if exceed pre-set threshold value, determine need balanced cell and need the balanced time according to the battery information collected, and control balance charge/discharge module with this and carry out charge or discharge to needing balanced cell, the pre-set threshold value wherein preferably arranged is: the charging pre-set threshold value of state-of-charge is 80 ~ 95% of the full electric state of batteries monomer battery, electric discharge pre-set threshold value is 10 ~ 30% of the full electric state of batteries monomer battery, in order to shorten match time, memory cell is provided with in microprocessor, the list of the state-of-charge of all cells-need time for balance is stored in memory cell, when the state-of-charge detected exceeds pre-set threshold value, the real-time state-of-charge that correspondence collects reads the time of corresponding needs equilibrium from memory cell, microprocessor controls according to carrying out management to balance charge/discharge module for controlling to need the time of balanced cell numbering and corresponding needs equilibrium, to reach the non-dissipative equalizing management of expection.
The utility model, according to battery behavior test of many times, obtains cell and is issued in phase induced current, relevant temperature condition the time that concrete state-of-charge needs, and obtains the list of the state-of-charge of described cell-need time for balance with this.
As shown in Figure 2, balance charge/discharge module of the present utility model comprises electrical connection successively and overall switch arrays, bi-directional DC-DC converter and the ultracapacitor C forming major loop with described battery pack,
Switch arrays 20, are controlled by described microprocessor, for selecting cell each in battery pack;
Ultracapacitor: for carrying out charge or discharge to selected cell;
Bi-directional DC-DC converter 30, is controlled by described microprocessor, for mating the voltage between the ultracapacitor cell balanced with needs.
Wherein, described switch arrays 20 have single-pole double-throw switch (SPDT) and n the single knife switch be connected with n cell respectively, and two conversion terminations of described single-pole double-throw switch (SPDT) are connected with all odd numbers cells of n cell, all even numbers cells respectively.
Based on the said structure of balance charge/discharge module, utilize bi-directional DC-DC converter 30, by ultracapacitor C as energy transfer unit, realize energy and flow between cell 11, complete the non-dissipative equalizing management of battery pack.
Bi-directional DC-DC converter 30 of the present utility model adopts the circuit module being integrated with boost chopper (Boost circuit) and buck circuit (Buck circuit), can by purchasing acquisition on the market, when bi-directional DC-DC converter 30 is operated in Boost state, charge to ultracapacitor C by battery pack 10; When bi-directional DC-DC converter 30 is operated in Buck state, discharged to battery pack 10 by ultracapacitor C, switch arrays 20 select according to microprocessor-based control signal the cell 11 completing discharge and recharge with ultracapacitor C, wherein by single knife switch H
1, H
2, H
n-1, H
nselect single cell 11, select all odd numbers cells 11 or all even numbers cells 11 by single-pole double-throw switch (SPDT) Ka, Kb simultaneously.
The utility model by ultracapacitor C as energy transfer unit, realize energy to flow between cell 11, complete the non-dissipative equalizing management of battery pack 10, the utility model preferably adopt ultracapacitor C as energy as energy transition transfer original paper, it has not consumed energy, the advantage that balancing speed is fast, overcome the shortcoming that the loss of resistance balanced energy is high, the balancing speed that simultaneously can overcome existing non-dissipative equalizing is slow, efficiency is low, and control switch complex structural designs, the shortcoming that system reliability is not high.Simultaneously by bi-directional DC-DC converter, make the energy flow speed between ultracapacitor C and cell to be equalized can control adjustable by external control circuit.
In order to improve the controlling of power conversion between the utility model battery pack 10 and ultracapacitor C further, it also comprises two diodes be connected on major loop, be respectively the first diode Q1 and the second diode Q2, the positive pole of the first diode Q1 connects bi-directional DC-DC converter 30, its negative pole connects the positive pole of ultracapacitor C, the positive pole of the second diode Q2 connects the negative pole of ultracapacitor C, and its negative pole connects bi-directional DC-DC converter 30.During the first diode Q1 conducting, bi-directional DC-DC converter 30 enters Boost state, and battery pack 10 charges to ultracapacitor C, and during the second diode Q2 conducting, bi-directional DC-DC converter 30 enters Buck state, and ultracapacitor C discharges to battery pack 10.
In order to the Long-distance Control, the high accuracy that realize the utility model switch arrays 20 control, described single knife switch and single-pole double-throw switch (SPDT) are respectively hilted broadsword relay, single-pole double-throw relay, have the feature that switch speed is fast simultaneously.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (10)
1. a non-dissipative equalizing management system for modular high-power battery pack, described battery pack has n the cell be sequentially connected in series, and it is characterized in that: it comprises
Balance charge/discharge module, is connected with battery pack, with to needing balanced cell to carry out charge or discharge in battery pack;
Battery parameter acquisition module, gathers the battery information of each cell in battery pack;
Microprocessor, for battery pack enter charging, electric discharge or static condition time, receive the battery information of described battery parameter acquisition module, judge according to the state-of-charge of the battery information collected to each cell, if exceed pre-set threshold value, then determine need balanced cell and need the balanced time according to the battery information that collects, and control balance charge/discharge module with this and carry out charge or discharge to needing balanced cell.
2. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 1, it is characterized in that: described balance charge/discharge module comprises electrical connection successively and overall switch arrays, bi-directional DC-DC converter and the ultracapacitor (C) forming major loop with described battery pack
Switch arrays, are controlled by described microprocessor, for selecting cell each in battery pack;
Ultracapacitor: for carrying out charge or discharge to selected cell;
Bi-directional DC-DC converter, is controlled by described microprocessor, for mating the voltage between the ultracapacitor cell balanced with needs.
3. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 1, it is characterized in that: described battery information at least comprises all cell state-of-charges, all monomer battery voltages, all cell electric currents, and all cell temperature.
4. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 2, is characterized in that: described microprocessor comprises memory cell, for storing the list of the state-of-charge of all cells-need time for balance.
5. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 4, it is characterized in that: when the state-of-charge of microprocessor judges cell exceeds pre-set threshold value, corresponding state-of-charge reads the time of corresponding needs equilibrium from described memory cell.
6. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 4, it is characterized in that: according to battery behavior test of many times, obtain cell and be issued in phase induced current, relevant temperature condition the time that concrete state-of-charge needs, obtain the list of the state-of-charge of described cell-need time for balance with this.
7. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 2, it is characterized in that: it also comprises heat treatment module, be controlled by microprocessor, for carrying out cooling process when the temperature of cell exceedes preset value to cell.
8. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 1, it is characterized in that: the charging pre-set threshold value of state-of-charge is 80 ~ 95% of the full electric state of batteries monomer battery, electric discharge pre-set threshold value is 10 ~ 30% of the full electric state of batteries monomer battery.
9. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 2, it is characterized in that: described switch arrays have single-pole double-throw switch (SPDT) and n the single knife switch be connected with n cell respectively, two conversion terminations of described single-pole double-throw switch (SPDT) are connected with all odd numbers cells of n cell, all even numbers cells respectively.
10. the non-dissipative equalizing management system of a kind of modular high-power battery pack according to claim 2, it is characterized in that: described balance charge/discharge module also comprises two diodes be connected on major loop, be respectively the first diode (Q1) and the second diode (Q2), the positive pole of the first diode (Q1) connects bi-directional DC-DC converter, its negative pole connects the positive pole of ultracapacitor (C), the positive pole of the second diode (Q2) connects the negative pole of ultracapacitor (C), and its negative pole connects bi-directional DC-DC converter.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105449296A (en) * | 2015-12-30 | 2016-03-30 | 苏州科纽普新能源科技有限公司 | Nondestructive equilibrium management system of modular high-power battery pack |
| CN107492917A (en) * | 2016-09-28 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Electric quantity balancing method, battery management system and the power electric car of electrokinetic cell |
| CN109428357A (en) * | 2017-08-31 | 2019-03-05 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN109435778A (en) * | 2017-08-31 | 2019-03-08 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN110061531A (en) * | 2018-01-19 | 2019-07-26 | 丰郅(上海)新能源科技有限公司 | The equalization methods of energy-storage battery |
| CN116154924A (en) * | 2023-04-14 | 2023-05-23 | 苏州大学 | Active equalization system and method for lithium battery based on double-layer topology |
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2015
- 2015-09-15 CN CN201520714004.6U patent/CN204905967U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105449296A (en) * | 2015-12-30 | 2016-03-30 | 苏州科纽普新能源科技有限公司 | Nondestructive equilibrium management system of modular high-power battery pack |
| CN107492917A (en) * | 2016-09-28 | 2017-12-19 | 宝沃汽车（中国）有限公司 | Electric quantity balancing method, battery management system and the power electric car of electrokinetic cell |
| CN109428357A (en) * | 2017-08-31 | 2019-03-05 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| WO2019042411A1 (en) * | 2017-08-31 | 2019-03-07 | 比亚迪股份有限公司 | Battery equalization method and system, vehicle, storage medium, and electronic device |
| CN109435778A (en) * | 2017-08-31 | 2019-03-08 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic equipment |
| CN109428357B (en) * | 2017-08-31 | 2020-11-20 | 比亚迪股份有限公司 | Battery equalization method, system, vehicle, storage medium and electronic device |
| CN110061531A (en) * | 2018-01-19 | 2019-07-26 | 丰郅(上海)新能源科技有限公司 | The equalization methods of energy-storage battery |
| CN110061531B (en) * | 2018-01-19 | 2023-03-14 | 丰郅(上海)新能源科技有限公司 | Energy storage battery equalization method |
| CN116154924A (en) * | 2023-04-14 | 2023-05-23 | 苏州大学 | Active equalization system and method for lithium battery based on double-layer topology |
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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: 20151223 Termination date: 20170915 |