CN103137935B - Conversion device for mutually converting serial connection and parallel connection among monomers or modules in battery pack - Google Patents
Conversion device for mutually converting serial connection and parallel connection among monomers or modules in battery pack Download PDFInfo
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- CN103137935B CN103137935B CN201310079745.7A CN201310079745A CN103137935B CN 103137935 B CN103137935 B CN 103137935B CN 201310079745 A CN201310079745 A CN 201310079745A CN 103137935 B CN103137935 B CN 103137935B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The invention discloses a conversion device for mutually converting serial connection and parallel connection among monomers or modules in a battery pack. The conversion device comprises a fixed part and a rotating part, wherein the fixed part and the rotating part are disk-shaped, connecting sheets are arranged on the fixed part and are uniformly arranged around the center of the fixed part, the rotating part and the fixed part are coaxially connected, parallel connection contacts and serial connection contacts are arranged on the rotating part and are uniformly arranged around the center of the rotating part, the surface of the fixed part, which is provided with the connecting sheets, is opposite to the surface of the rotating part, which is provided with the parallel connection contacts and the serial connection contacts, when monomers or modules in the battery pack are connected in parallel, the parallel connection contacts are in contact with the connecting sheets, and the serial connection contacts are separated from the connecting sheets; and when the monomers or modules in the battery pack are serially connected, the serial connection contacts are in contact with the connecting sheets and the parallel connection contacts are separated from the connecting sheets. The conversion device for mutually converting serial connection and parallel connection among the monomers or modules in the battery pack is simple in structure, and is capable of rapidly and conveniently realizing conversion of serial connection and parallel connection among the monomers or modules in the battery pack.
Description
Technical field
The present invention relates to monomer or intermodule in a kind of battery pack to connect and the conversion equipment mutually changed in parallel.
Background technology
Along with country is to the progressively enhancing of the pay attention to day by day of environmental protection and people's environmental consciousness, bicycle major part replace by electric bicycle, new-energy automobile also has the trend progressively replacing fuel-engined vehicle.No matter electric bicycle or electric automobile all be unable to do without a core component---power-supply system, and this power-supply system is not all like mobile phone, only with one piece of battery, but combined by a lot of battery series-parallel connection.Current everybody common concern lithium ion battery in the power supply system.But still there is certain problem when connecting and using in lithium ion battery.For lithium ion battery classification ferric phosphate lithium cell, the cycle life of single ferric phosphate lithium cell can reach more than 2000 substantially, but when 12 conspire to create group use, its performance is but had a greatly reduced quality, life-span only has 800-1000 time substantially, and what have is even lower.This is due to higher to the requirement of battery consistency when battery uses in groups.Use in groups and only use some difference such with single: 1. capacity volume variance between monomer in battery pack: when using in groups, if certain battery capacity is less than normal, then when charging, the constant current charge later stage, this cell voltage was the highest, when other battery does not reach constant voltage value, it likely overcharges, and single only use does not exist this problem; 2. self discharge difference: when battery list only uses, if its self discharge is large, discharges after shelving a period of time, and just discharge capacity is this time lower, and when again charging, its capacity can add to again the capacity before shelving, and does not affect later discharge performance.But when using in groups, if some self-discharge of battery are excessive, when discharging after shelving a period of time, it is discharged at first, and now other battery capacity does not discharge yet, can not be full of by the battery that the restriction self discharge of other battery charge capacity is large when charging, so As time goes on, the capacity that the battery that self discharge is large can fill is fewer and feweri compared with other battery, finally causes whole battery capacity defective; 3. polarization difference between each monomer in battery pack: even if Performance comparision is close when each battery in battery pack is initial, but each battery polarization state after Long-Time Service in battery pack will inevitably be variant, when connecting constant current charge, no matter battery polarization size, all equal by the charging current of each battery, like this will Accelerated polarization large battery life decay.In order to solve the problem; to carry out matching to reduce between batteries monomer except initial difference except selecting the good battery of consistency when battery combo as far as possible as far as possible; the common practice solving self discharge difference and capacity volume variance is the mode adopting equilibrium+charge protection; though can effective head it off in this kind of mode principle, there is when implementing the drawback that cost is high, reliability is still to be tested and the difficult problem of polarization difference between monomer cannot be solved.
Someone then adopts another mode to solve above problem: adopt charged in parallel.When charged in parallel; the charging voltage of battery pack is with composition monomer whose or module voltage is consistent; then the now charging of battery pack is the equal of just monomer or module charging; and charged in parallel has individual advantage; automatic shunt can be carried out consistent to reach voltage according to the polarization situation of its each branch road; as large in the polarization of certain monomer, then its electric current got is corresponding will be less, makes it be protected like this.
Therefore, monomer or intermodule in a kind of battery pack is needed to connect with the conversion equipment mutually changed in parallel to solve the problem.
Summary of the invention
Goal of the invention: the present invention is directed to particularly eccentric overload effect and the defect that the bridge superstructure that causes topples of traffic loading in prior art, to provide in a kind of battery pack monomer or intermodule series connection and the conversion equipment mutually changed in parallel.
Technical scheme: for solving the problems of the technologies described above, in battery pack of the present invention, monomer or intermodule series connection adopt following technical scheme with the conversion equipment mutually changed in parallel:
In a kind of battery pack, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, comprise fixed part and rotating parts, described fixed part and rotating parts are disc, described fixed part is provided with brace, described brace is evenly distributed around the center of described fixed part, described rotating parts is coaxially connected with described fixed part, described rotating parts is provided with collateral contact and series connection contact, described collateral contact is evenly distributed with the series connection center of contact all around described rotating parts, the face of described fixed part band brace is oppositely arranged with the face of described rotating parts band collateral contact and contact of connecting, when monomer in battery pack or intermodule parallel connection, described collateral contact contacts with described brace, described series connection contact is separated with described brace, when monomer in battery pack or intermodule series connection, described series connection contact contacts with described brace, and described collateral contact is separated with described brace.
Further, the number of described brace is 2 times of the number of monomer or module in described battery pack.
Further, the number of described collateral contact is identical with the number of described brace.
Further, fewer than the number of described brace two of the number of described series connection contact.
Further, described brace comprises positive strap and negative straps, described positive strap connects the positive pole of described monomer or module, described negative straps connects the negative pole of described monomer or module, described positive strap arranges the side of described fixed part center line, and described negative straps is arranged on the opposite side of described fixed part center line.
Further, described collateral contact comprises cathode contact in parallel and cathode contact in parallel, described cathode contact in parallel is arranged on the side of described rotating parts center line, described cathode contact in parallel is arranged on the opposite side of described rotating parts center line, be interconnected between described cathode contact in parallel, be interconnected between described cathode contact in parallel.
Further, a described series connection contact is provided with between two adjacent described collateral contacts.
Further, described series connection contact comprises series connection cathode contact and series connection cathode contact, described series connection cathode contact is arranged on the side of described rotating parts center line, described series connection cathode contact is arranged on the opposite side of described rotating parts center line, and described series connection cathode contact connects corresponding described series connection cathode contact.
Further, described series connection contact is arranged on the outside of described collateral contact.
Beneficial effect: in battery pack of the present invention monomer or intermodule series connection simple with the conversion device structure mutually changed in parallel, dependable performance, simple to operate, batteries monomer or intermodule can be realized quickly and easily and connect and switch with in parallel.
Accompanying drawing explanation
Fig. 1 is the series circuit figure of four batteries;
Fig. 2 is the parallel circuits figure of four batteries;
Fig. 3 is the structural representation of the fixed part of embodiment 1;
Fig. 4 is the structural representation of the rotating parts of embodiment 1;
The fixed part of conversion equipment and rotating parts position corresponding diagram when Fig. 5 is electric discharge, now cell/module is in series connection;
The fixed part of conversion equipment and rotating parts position corresponding diagram when Fig. 6 is charging, now cell/module is in parallel connection.
Embodiment
Below in conjunction with the drawings and specific embodiments, illustrate the present invention further, these embodiments should be understood only be not used in for illustration of the present invention and limit the scope of the invention, after having read the present invention, the amendment of those skilled in the art to the various equivalent form of value of the present invention has all fallen within the application's claims limited range.
In battery pack of the present invention, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, comprise fixed part and rotating parts.Fixed part and rotating parts are disc.
Wherein, fixed part is provided with brace, brace is evenly distributed around the center of fixed part.The number of brace is 2 times of the number of monomer or module in battery pack.Brace comprises positive strap and negative straps, positive strap connects the positive pole of monomer or module, negative straps connects the negative pole of monomer or module, and positive strap arranges the side of fixed part center line, and negative straps is arranged on the opposite side of fixed part center line.
Rotating parts is coaxially connected with fixed part, and rotating parts is provided with collateral contact and series connection contact, collateral contact is evenly distributed with the series connection center of contact all around rotating parts.Series connection contact is arranged on the outside of collateral contact.Wherein, the number of collateral contact is identical with the number of brace.Fewer than the number of brace two of the number of series connection contact.The face of fixed part band brace is oppositely arranged with the face of rotating parts band collateral contact and contact of connect, is realized monomer or intermodule in battery pack by the contact of collateral contact or connect contact and brace and connects and mutually to change with in parallel with being separated.
When monomer in battery pack or intermodule parallel connection, collateral contact contacts with brace, and series connection contact is separated with brace; When monomer in battery pack or intermodule series connection, series connection contact contacts with brace, and collateral contact is separated with brace.
Collateral contact comprises cathode contact in parallel and cathode contact in parallel, and cathode contact in parallel is arranged on the side of rotating parts center line, and cathode contact in parallel is arranged on the opposite side of rotating parts center line.Be interconnected between cathode contact in parallel, be interconnected between cathode contact in parallel.A collateral contact is provided with between two adjacent collateral contacts.Series connection contact comprises series connection cathode contact and series connection cathode contact, and series connection cathode contact is arranged on the side of rotating parts center line, and series connection cathode contact is arranged on the opposite side of rotating parts center line, and series connection cathode contact connects corresponding series connection cathode contact.
embodiment 1
Refer to shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6,
Fig. 1 is the series circuit figure of four batteries;
Fig. 2 is the parallel circuits figure of four batteries;
Fig. 3 is the structural representation of the fixed part of the conversion equipment corresponding with four batteries or monomer;
Fig. 4 is the structural representation of the rotating parts of the conversion equipment corresponding with four batteries or monomer;
The fixed part of conversion equipment and rotating parts position corresponding diagram when Fig. 5 is electric discharge, now cell/module is in series connection;
The fixed part of conversion equipment and rotating parts position corresponding diagram when Fig. 6 is charging, now cell/module is in parallel connection.
Concrete using method:
1. the both positive and negative polarity of 4 batteries is designated as 1+/1-, 2+/2-, 3+/3-, 4+/4-respectively;
2. 8 braces in the fixed part of conversion equipment are labeled as 1+ brace, 2+ brace, 3+ brace, 4+ brace, 2-brace, 3-brace, 4-brace, 1-brace respectively according to clock-wise order;
3. connect corresponding with the brace of 8 in the fixed part of conversion equipment in order respectively for 8 of 4 batteries both positive and negative polarities;
4. the rotating parts of conversion equipment and fixed part coaxial cooperation good; Wherein, fixed part and rotating parts are disc;
5., when the rotating parts of conversion equipment rotates to position as shown in Figure 5, series connection contact contacts with brace, and collateral contact is separated with brace, and 4 monomers are for being connected in series, and its circuit theory diagrams as shown in Figure 1;
6. when the rotating parts of conversion equipment rotates to position as shown in Figure 6, collateral contact contacts with brace, and series connection contact is separated with brace; 4 monomers are for being connected in parallel, and its circuit theory diagrams as shown in Figure 2.
In battery pack of the present invention monomer or intermodule series connection simple with the conversion device structure mutually changed in parallel, dependable performance, simple to operate, batteries monomer or intermodule can be realized quickly and easily and connect and switch with in parallel.
Claims (8)
1. in a battery pack, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, it is characterized in that, comprise fixed part and rotating parts, described fixed part and rotating parts are disc, described fixed part is provided with brace, described brace is evenly distributed around the center of described fixed part, described rotating parts is coaxially connected with described fixed part, described rotating parts is provided with collateral contact and series connection contact, described collateral contact is evenly distributed with the series connection center of contact all around described rotating parts, the face of described fixed part band brace is oppositely arranged with the face of described rotating parts band collateral contact and contact of connecting, when monomer in battery pack or intermodule parallel connection, described collateral contact contacts with described brace, described series connection contact is separated with described brace, when monomer in battery pack or intermodule series connection, described series connection contact contacts with described brace, and described collateral contact is separated with described brace.
2. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, and it is characterized in that, the number of described brace is 2 times of the number of monomer or module in described battery pack.
3. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, and it is characterized in that, the number of described collateral contact is identical with the number of described brace.
4. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, it is characterized in that, fewer than the number of described brace two of the number of described series connection contact.
5. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, it is characterized in that, described brace comprises positive strap and negative straps, described positive strap connects the positive pole of described monomer or module, described negative straps connects the negative pole of described monomer or module, described positive strap arranges the side of described fixed part center line, and described negative straps is arranged on the opposite side of described fixed part center line.
6. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, it is characterized in that, described collateral contact comprises cathode contact in parallel and cathode contact in parallel, described cathode contact in parallel is arranged on the side of described rotating parts center line, described cathode contact in parallel is arranged on the opposite side of described rotating parts center line, be interconnected between described cathode contact in parallel, be interconnected between described cathode contact in parallel.
7. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, it is characterized in that, described series connection contact comprises series connection cathode contact and series connection cathode contact, described series connection cathode contact is arranged on the side of described rotating parts center line, described series connection cathode contact is arranged on the opposite side of described rotating parts center line, and described series connection cathode contact connects corresponding described series connection cathode contact.
8. in battery pack as claimed in claim 1, monomer or intermodule are connected and the conversion equipment mutually changed in parallel, and it is characterized in that, described series connection contact is arranged on the outside of described collateral contact.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079745.7A CN103137935B (en) | 2013-03-13 | 2013-03-13 | Conversion device for mutually converting serial connection and parallel connection among monomers or modules in battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310079745.7A CN103137935B (en) | 2013-03-13 | 2013-03-13 | Conversion device for mutually converting serial connection and parallel connection among monomers or modules in battery pack |
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| CN103137935A CN103137935A (en) | 2013-06-05 |
| CN103137935B true CN103137935B (en) | 2015-06-10 |
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| CN201310079745.7A Active CN103137935B (en) | 2013-03-13 | 2013-03-13 | Conversion device for mutually converting serial connection and parallel connection among monomers or modules in battery pack |
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Families Citing this family (13)
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| CN105428581B (en) * | 2015-11-27 | 2017-11-14 | 上海航天电源技术有限责任公司 | The lithium ionic cell module and its switching method of a kind of switching regulator |
| AU2016366842B9 (en) * | 2015-12-11 | 2019-10-24 | Milwaukee Electric Tool Corporation | Method and apparatus for connecting a plurality of battery cells in series or parallel |
| CN107482924A (en) * | 2016-06-08 | 2017-12-15 | 苏州宝时得电动工具有限公司 | Conversion equipment, electric supply installation and electric power system |
| CN106655329A (en) * | 2016-08-31 | 2017-05-10 | 黄银山 | Multi-storage battery serial-parallel circuit conversion assembly |
| CN107874319B (en) | 2016-09-30 | 2020-11-03 | 卓尔悦欧洲控股有限公司 | Electronic cigarette and power supply structure thereof |
| CN106571669B (en) * | 2016-11-03 | 2023-08-08 | 东莞市麦斯莫科电子科技有限公司 | Battery switching device |
| KR102178946B1 (en) | 2018-01-30 | 2020-11-13 | 주식회사 엘지화학 | Apparatus for converting between serial and parallel and battery module including the same |
| CN108711645B (en) * | 2018-06-07 | 2020-04-03 | 安徽海锂子新能源科技股份有限公司 | Pointer type circuit group serial-parallel control device |
| CN108565364B (en) * | 2018-06-07 | 2021-02-23 | 安徽风驰新能源科技股份有限公司 | Freely-changing position changing series-parallel connection device |
| CN109638210B (en) * | 2019-01-18 | 2024-04-16 | 黄银山 | Series-parallel converter for storage battery pack |
| CN111916580A (en) * | 2019-05-08 | 2020-11-10 | 浙江鼎能电气有限公司 | Battery pack system for improving transportation safety |
| KR20210004187A (en) * | 2019-07-03 | 2021-01-13 | 주식회사 엘지화학 | Battery pack and energy storage system comprising the same |
| CN111301225B (en) * | 2019-12-05 | 2021-02-09 | 常州机电职业技术学院 | Universal equalizing charging system and universal equalizing charging method |
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| CN203232919U (en) * | 2013-03-13 | 2013-10-09 | 江苏华富储能新技术股份有限公司 | Conversion device for mutually converting serial connection and parallel connection between single bodies or modules of battery pack |
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Patent Citations (4)
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