CN204615434U - The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter - Google Patents
The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter Download PDFInfo
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- CN204615434U CN204615434U CN201520189705.2U CN201520189705U CN204615434U CN 204615434 U CN204615434 U CN 204615434U CN 201520189705 U CN201520189705 U CN 201520189705U CN 204615434 U CN204615434 U CN 204615434U
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- ion batteries
- switch
- module
- batteries piles
- converter
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- 229910001416 lithium ion Inorganic materials 0.000 title claims abstract description 40
- 230000035939 shock Effects 0.000 claims abstract description 26
- 238000003491 array Methods 0.000 claims description 12
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 claims description 7
- 238000000034 method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000004146 energy storage Methods 0.000 description 2
- 239000000178 monomer Substances 0.000 description 2
- 238000005070 sampling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Abstract
The utility model proposes the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter, comprise Li-ion batteries piles to be equalized, switch mosfet array door driver module, normal shock DC/DC converter module and MCU module; Described Li-ion batteries piles to be equalized is electrically connected with described switch mosfet array door driver module, described switch mosfet array door driver module is electrically connected with described normal shock DC/DC converter module, described normal shock DC/DC converter module is electrically connected with described MCU module, and described MCU module is electrically connected with described switch mosfet array door driver module.The two-way active balanced way that the utility model realizes, can realize almost loss-free energy trasfer, maximum euqalizing current can reach 5A, thus greatly can improve the service efficiency of Li-ion batteries piles and extend the useful life of battery pack.
Description
Technical field
The utility model relates to electric automobile or large power energy storage power station battery management system technical field, specifically the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter.
Background technology
Electric automobile or large power energy storage system are composed in series by a large amount of battery module; due to the charge-discharge characteristic of battery, particularly lithium ion battery; battery pack needs independent battery management system effectively manage it and protect, thus ensures use safety and the life-span of battery.
In battery pack, monomer battery voltage difference is the conforming important indicator of characterizing battery, in charging and discharging process, keeping monomer voltage difference in a rational scope, can ensure that battery is not by super-charge super-discharge, is ensure battery pack use safety and the important means in life-span.
At present, the mode of the passive equilibrium of the battery balanced main employing of Li-ion batteries piles, which euqalizing current is little, and efficiency is low, and balancing procedure energy becomes the heat energy of resistance completely and loses.
Utility model content
The utility model proposes the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter, efficiently solve the mode of the passive equilibrium of the battery balanced main employing of Li-ion batteries piles.
The technical solution of the utility model is achieved in that
The two-way active equalization system of Li-ion batteries piles based on forward converter, comprises Li-ion batteries piles to be equalized, switch mosfet array door driver module, normal shock DC/DC converter module and MCU module;
Described Li-ion batteries piles to be equalized is electrically connected with described switch mosfet array door driver module, described switch mosfet array door driver module is electrically connected with described normal shock DC/DC converter module, described normal shock DC/DC converter module is electrically connected with described MCU module, and described MCU module is electrically connected with described switch mosfet array door driver module.
Further, described Li-ion batteries piles to be equalized comprises the lithium ion battery of some series connection.
Further, described switch mosfet array door driver module comprises cell switch array, polarity switch and switch arrays gate driver; Described Li-ion batteries piles to be equalized is connected with described cell switch array electric, and described cell switch array is electrically connected with described polarity switch, and described polarity switch is electrically connected with described normal shock DC/DC converter module;
Described switch arrays gate driver is electrically connected with described cell switch array, polarity switch and MCU module respectively.
Further, described cell switch array comprises some cell switchs, and each cell switch comprises the NMOSFET of two series connection, and the source electrode of the NMOSFET of two series connection links together; The two ends of each NMOSFET are parallel with a diode, and the positive pole of described diode and the source electrode of NMOSFET link together.
Further, described polarity switch is made up of the NMOSFET of parallel connection and diode.
Further, described switch arrays gate driver is electrically connected with each NMOSFET.
Further, described normal shock DC/DC converter module comprises normal shock DC/DC converter and DC/DC converter controller.
The beneficial effects of the utility model are:
The two-way active balanced way that the utility model realizes, can realize almost loss-free energy trasfer, maximum euqalizing current can reach 5A, thus greatly can improve the service efficiency of Li-ion batteries piles and extend the useful life of battery pack.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, 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 structural representation of the utility model embodiment;
Fig. 2 is the electrical block diagram of embodiment in Fig. 1.
In figure:
1, Li-ion batteries piles to be equalized; 2, switch mosfet array door driver module; 3, normal shock DC/DC converter module; 4, MCU module.
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.
As depicted in figs. 1 and 2, the two-way active equalization system of the Li-ion batteries piles based on forward converter in the present embodiment, comprises Li-ion batteries piles 1 to be equalized, switch mosfet array door driver module 2, normal shock DC/DC converter module 3 and MCU module 4.
Wherein, Li-ion batteries piles 1 to be equalized is electrically connected with switch mosfet array door driver module 2, switch mosfet array door driver module 2 is electrically connected with normal shock DC/DC converter module 3, normal shock DC/DC converter module 3 is electrically connected with MCU module 4, and MCU module 4 is electrically connected with switch mosfet array door driver module 2.
In the present embodiment, Li-ion batteries piles 1 to be equalized comprises the lithium ion battery of some series connection.Switch mosfet array door driver module 2 comprises cell switch array, polarity switch and switch arrays gate driver; Li-ion batteries piles 1 to be equalized is connected with cell switch array electric, and cell switch array is electrically connected with polarity switch, and polarity switch is electrically connected with normal shock DC/DC converter module 3; Switch arrays gate driver is electrically connected with cell switch array, polarity switch and MCU module 4 respectively.
Cell switch array comprises some cell switchs, and each cell switch comprises the NMOSFET of two series connection, and the source electrode of the NMOSFET of two series connection links together; The two ends of each NMOSFET are parallel with a diode, and the positive pole of diode and the source electrode of NMOSFET link together.Cell switch controls balanced direction.
Polarity switch is made up of the NMOSFET of parallel connection and diode, and it is a direction that polarity switch controls sense of current.Switch arrays gate driver is electrically connected with each NMOSFET, and each MOSFET that switch arrays gate driver is cell switch and polarity switch provides and drives and control.
Normal shock DC/DC converter module 3 comprises normal shock DC/DC converter and DC/DC converter controller, normal shock DC/DC converter comprises pulse transformer, switch mosfet, sampling resistor etc., pulse transformer realizes the transfer of energy, by the energy feedback of a certain joint lithium ion battery to battery pack or by the energy trasfer of battery pack to a certain joint lithium ion battery, sampling resistor realizes the feedback stability euqalizing current of euqalizing current.DC/DC converter controller produces pwm signal.Normal shock DC/DC converter controller realizes that MOSFET drives, the control of the frequency of pwm signal, amplitude and euqalizing current.
The course of work of the present embodiment is described for CELL1 below:
Equalization discharge: when CELL1 cell voltage is higher than this battery voltage certain value (can set), starts CELL1 battery discharge balanced.First, MCU module 4 sends equalization command, corresponding MOSFET cell switch Q11 in CELL1 battery two terminated line, Q22 opens under the driving of switch arrays gate driver, corresponding polarity switch Qp1, Qp4 also opens, DC/DC converter controller receives MCU module 4 and orders, produce PWM drive singal, the switch mosfet in normal shock DC/DC converter and pulse transformer is driven to realize the forward conversion of DC/DC, by the energy trasfer of CELL1 battery to battery pack, until CELL1 cell voltage and this battery voltage difference reach allowed band, so just realize the equalization discharge of this batteries.
Charge balancing: when CELL1 cell voltage is lower than this battery voltage certain value (can set), starts CELL1 battery charge balancing.First, MCU module 4 sends equalization command, corresponding MOSFET cell switch Q12 in CELL1 battery two terminated line, Q21 opens under the driving of switch arrays gate driver, corresponding polarity switch Qp2, Qp3 also opens, DC/DC converter controller receives MCU module 4 and orders, produce PWM drive singal, the switch mosfet in normal shock DC/DC converter and pulse transformer is driven to realize the forward conversion of DC/DC, by the energy trasfer of battery pack to CELL1 battery, until CELL1 cell voltage and this battery voltage difference reach allowed band, so just realize the charge balancing of this batteries.
The same CELL1 of bidirectional modulation Principle of Process of other lithium ion battery, no longer repeats.
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 (7)
1. based on the two-way active equalization system of Li-ion batteries piles of forward converter, it is characterized in that, comprise Li-ion batteries piles to be equalized, switch mosfet array door driver module, normal shock DC/DC converter module and MCU module;
Described Li-ion batteries piles to be equalized is electrically connected with described switch mosfet array door driver module, described switch mosfet array door driver module is electrically connected with described normal shock DC/DC converter module, described normal shock DC/DC converter module is electrically connected with described MCU module, and described MCU module is electrically connected with described switch mosfet array door driver module.
2. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 1, it is characterized in that, described Li-ion batteries piles to be equalized comprises the lithium ion battery of some series connection.
3. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 2, it is characterized in that, described switch mosfet array door driver module comprises cell switch array, polarity switch and switch arrays gate driver; Described Li-ion batteries piles to be equalized is connected with described cell switch array electric, and described cell switch array is electrically connected with described polarity switch, and described polarity switch is electrically connected with described normal shock DC/DC converter module;
Described switch arrays gate driver is electrically connected with described cell switch array, polarity switch and MCU module respectively.
4. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 3, it is characterized in that, described cell switch array comprises some cell switchs, each cell switch comprises the NMOSFET of two series connection, and the source electrode of the NMOSFET of two series connection links together; The two ends of each NMOSFET are parallel with a diode, and the positive pole of described diode and the source electrode of NMOSFET link together.
5. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 4, is characterized in that, described polarity switch is made up of the NMOSFET of parallel connection and diode.
6. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 5, it is characterized in that, described switch arrays gate driver is electrically connected with each NMOSFET.
7. the two-way active equalization system of a kind of Li-ion batteries piles based on forward converter as claimed in claim 6, it is characterized in that, described normal shock DC/DC converter module comprises normal shock DC/DC converter and DC/DC converter controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520189705.2U CN204615434U (en) | 2015-03-31 | 2015-03-31 | The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520189705.2U CN204615434U (en) | 2015-03-31 | 2015-03-31 | The two-way active equalization system of a kind of Li-ion batteries piles based on forward converter |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978108A (en) * | 2016-07-13 | 2016-09-28 | 江西迪比科股份有限公司 | Automobile power battery buffer type active equalization circuit and equalization method |
| CN106655305A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Voltage active equalization circuit for a single battery of storage batteries |
| CN108539816A (en) * | 2018-04-24 | 2018-09-14 | 深圳市斯玛特新能源技术有限公司 | A kind of lithium battery module series equalizer |
| CN109742459A (en) * | 2018-12-20 | 2019-05-10 | 中国电子科技集团公司第四十八研究所 | A kind of lithium battery management system of unmanned plane quick charge |
-
2015
- 2015-03-31 CN CN201520189705.2U patent/CN204615434U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655305A (en) * | 2015-10-30 | 2017-05-10 | 北京精密机电控制设备研究所 | Voltage active equalization circuit for a single battery of storage batteries |
| CN105978108A (en) * | 2016-07-13 | 2016-09-28 | 江西迪比科股份有限公司 | Automobile power battery buffer type active equalization circuit and equalization method |
| CN108539816A (en) * | 2018-04-24 | 2018-09-14 | 深圳市斯玛特新能源技术有限公司 | A kind of lithium battery module series equalizer |
| CN109742459A (en) * | 2018-12-20 | 2019-05-10 | 中国电子科技集团公司第四十八研究所 | A kind of lithium battery management system of unmanned plane quick charge |
| CN109742459B (en) * | 2018-12-20 | 2021-12-14 | 中国电子科技集团公司第四十八研究所 | Lithium battery management system for rapid charging of unmanned aerial vehicle |
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