CN201690248U - Accumulator charging and discharging connection device - Google Patents
Accumulator charging and discharging connection device Download PDFInfo
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- CN201690248U CN201690248U CN2010201763695U CN201020176369U CN201690248U CN 201690248 U CN201690248 U CN 201690248U CN 2010201763695 U CN2010201763695 U CN 2010201763695U CN 201020176369 U CN201020176369 U CN 201020176369U CN 201690248 U CN201690248 U CN 201690248U
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- voltage bus
- accumulator
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- discharging
- negative pole
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Abstract
The utility model provides an accumulator charging and discharging connection device, which has simple structure and is convenient and practical, and comprises at least an accumulator and two-way dc-dc converters which have the same number with the accumulators, wherein all accumulators are connected together in series, positive poles of an accumulator group is connected with the positive pole of a high voltage bus, a negative pole thereof is connected with the negative pole of the high voltage bus, each accumulator is connected with like polarity on one side of the two-way dc-dc converters, the positive poles of the other sides of the two-way dc-dc converters are connected with the positive poles of a low voltage bus, and the negative poles thereof are connected with the negative pole of the low voltage bus. The accumulator charging and discharging connection device can synchronously complete charging and discharging of the accumulator group through connecting each accumulator and the two-way dc-dc converters, and has higher practical value.
Description
Technical field
The utility model relates to a kind of jockey of accumulator cell charging and discharging.
Background technology
At present, the device of accumulator cell charging and discharging has been applied in each power electronics industry more and more widely, but because there is following shortcoming in storage battery: initial capacity difference when make (1); (2) capacity is in the rate of decay difference of use; (3) self-discharge rate difference, when making the cell series connection application of same nominal capacity, the actual carrying capacity difference of each monomer, can not be full of simultaneously, put simultaneously, cause the waste of battery capacity, and this situation can constantly be aggravated along with the increase of battery charging and discharging cycle-index and charged time.
For overcoming the problems referred to above, some storage batterys (as lead-acid battery) adopt the way of all filling, and promptly by the monomer that has been full of is overcharged other monomers are full of, and this is a cost with waste electric energy and sacrifice battery cycle life.Other batteries (as lithium ion battery, double electric layer capacitor etc.), its Structure Mechanism decision can not overcharge or cross puts, otherwise can cause expendable destruction, must take special safeguard measure.
Existing super-charge super-discharge safeguard measure (measure of the charge and discharge balancing of title is also arranged) mainly contains the shunt resistance method, pressure limiting circuit shunt method, Uniderectional DC-DC shunt method, switching capacity method for equalizing voltage etc.Preceding two kinds of need consumed powers, though back two kinds of energy recovery section power, efficient is low and control is complicated, realizes the cost height.The utility model need not be special control, the charging or discharging current that just can in the overall process that discharges and recharges, distribute each monomer automatically, the unanimity that keeps each cell terminal voltage, each cell is full of synchronously or has put synchronously, and conversion efficiency height, the utility model also can provide low-pressure port simultaneously in addition, can save special buck DC-DC converter in application such as electric automobile.
The utility model content
In order to solve the problem that exists in the above-mentioned accumulator cell charging and discharging, the utility model provides the jockey of accumulator cell charging and discharging a kind of simple in structure, convenient and practical, and it thes contents are as follows:
A kind of jockey of accumulator cell charging and discharging, this device comprises at least one storage battery, reach the bidirectional, dc identical rheology parallel operation always with the storage battery number, wherein all storage batterys are cascaded, the positive pole of batteries links to each other with the positive pole of high voltage bus, its negative pole links to each other with the negative pole of high voltage bus, and a side same polarity of each storage battery and a two-way DC-DC converter links, the opposite side positive pole of this two-way DC-DC converter links to each other with the positive pole of low-voltage bus bar, and its negative pole links to each other with the negative pole of low-voltage bus bar.
From the above, the utility model can finish discharging and recharging of batteries by each storage battery is linked to each other with two-way DC-DC converter synchronously, has higher utility.
Description of drawings
Fig. 1 is a jockey schematic diagram of the present utility model;
Fig. 2 is the equivalent circuit diagram of bidirectional DC-DC converter.
Specific embodiment
Below with reference to accompanying drawing the utility model is elaborated.As shown in Figure 1, B1, B2, B3 to Bn are n single storage battery, P1, P2, P3 to Pn are n two-way isolated form DC-DC converter, after the positive and negative electrodes in same polarity of the A side ports of each converter and single corresponding battery connects, again each single battery series connection is constituted high direct voltage bus VH, the B side ports same polarity of each converter connects the low-voltage bus bar VL that constitutes in parallel.
Fig. 2 is the equivalent electric circuit of bidirectional DC-DC converter, wherein T is an ideal transformer, R is an equivalent internal resistance of converting the A side, its intrinsic transmission characteristic is that maintenance B side voltage is M times of A side voltage, be VB=M*VA, as VB during less than M*VA, power is transmitted by A side direction B side, otherwise then by the transmission of B side direction A side, the maximum power of transmission or electric current can be limited.After each DC-DC converter B side parallel connection, B side voltage is VL, then all terminal voltages single battery being higher than VL/M is emitted power by the DC-DC of correspondence to low-voltage bus bar, single the battery that all terminal voltages are lower than VL/M passes through corresponding DC-DC from the low-voltage bus bar absorbed power, the terminal voltage of each single battery is equal to VL/M during balance, and each single battery is full of simultaneously, emptying simultaneously thereby make.DC-DC selects suitable voltage transmission ratio, and the low-voltage electric system that can obtain suitable low-voltage bus bar voltage VL (about 12V, 24V is last inferior) and be electric automobile etc. is powered.When from the low-voltage bus bar power output, each single battery is emitted power to low-voltage bus bar simultaneously, and when to the low-voltage bus bar input power, each single battery is simultaneously from the low-voltage bus bar received power.
Below in conjunction with Fig. 1 to the storage battery that is applicable to the small-sized electric car in groups the embodiment of scheme describe.B1, B2, B3 to BN are 100Ah lithium ion single battery, totally 80 save, and the battery cell terminal voltage is 3.0V to 4.1V, and back high voltage bus voltage is 240V to 328V in groups.DC-DC converter P1, P2, P3 to PN (totally 80) voltage transmission are 4 than M, and then low-voltage bus bar voltage is 12V to 16.4V.According to related standards, dispatch from the factory maximum capacity and the minimum value of lithium ion battery differ 10%, promptly differ with mean value ± 5%, consider battery use in capacity attenuation and self discharge inconsistent, if actual capacity and mean value differs ± and 10%, if the maximum charging and discharging currents of battery is 100A, then DC-DC converter A side maximum current is that 10A gets final product, the maximum transform power that is the DC-DC converter is 41W, but the about 3KW of maximum power of low-voltage bus bar port input and output.
More than a kind of accumulator cell charging and discharging jockey provided by the utility model is described in detail, used specific case herein principle of the present utility model and execution mode are set forth, the explanation of above example just is used for helping to understand method of the present utility model and core concept; Simultaneously, for this area
As the technical staff, according to thought of the present utility model, the part that all can change in specific embodiments and applications, the content of this specification should not be construed as restriction of the present utility model.
Claims (1)
1. the jockey of an accumulator cell charging and discharging, this device comprises at least one storage battery, reach two-way DC-DC converter with the storage battery same number, it is characterized in that: all storage batterys are cascaded, the positive pole of batteries links to each other with the positive pole of high voltage bus, its negative pole links to each other with the negative pole of high voltage bus, and a side same polarity of each storage battery and a two-way DC-DC converter links, the opposite side positive pole of this two-way DC-DC converter links to each other with the positive pole of low-voltage bus bar, and its negative pole links to each other with the negative pole of low-voltage bus bar.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201763695U CN201690248U (en) | 2010-04-30 | 2010-04-30 | Accumulator charging and discharging connection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201763695U CN201690248U (en) | 2010-04-30 | 2010-04-30 | Accumulator charging and discharging connection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201690248U true CN201690248U (en) | 2010-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201763695U Expired - Lifetime CN201690248U (en) | 2010-04-30 | 2010-04-30 | Accumulator charging and discharging connection device |
Country Status (1)
| Country | Link |
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| CN (1) | CN201690248U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684273A (en) * | 2011-03-10 | 2012-09-19 | 三星Sdi株式会社 | Rechargeable battery charge-discharge system and driving method thereof |
| CN106655294A (en) * | 2015-07-31 | 2017-05-10 | 比亚迪股份有限公司 | Charging conversion device used for vehicle and charging conversion method thereof |
| CN107696863A (en) * | 2016-08-08 | 2018-02-16 | 比亚迪股份有限公司 | EMS and its control method, the electric automobile of electric automobile |
-
2010
- 2010-04-30 CN CN2010201763695U patent/CN201690248U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684273A (en) * | 2011-03-10 | 2012-09-19 | 三星Sdi株式会社 | Rechargeable battery charge-discharge system and driving method thereof |
| CN102684273B (en) * | 2011-03-10 | 2015-11-25 | 三星Sdi株式会社 | Rechargeable battery charge-discharge system and driving method thereof |
| CN106655294A (en) * | 2015-07-31 | 2017-05-10 | 比亚迪股份有限公司 | Charging conversion device used for vehicle and charging conversion method thereof |
| CN107696863A (en) * | 2016-08-08 | 2018-02-16 | 比亚迪股份有限公司 | EMS and its control method, the electric automobile of electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Anhui Dynamic Power Co., Ltd. Assignor: Beijing Power Producer Science and Technology Co., Ltd. Contract record no.: 2012340000022 Denomination of utility model: Accumulator charging and discharging connection device Granted publication date: 20101229 License type: Exclusive License Record date: 20120319 |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101229 |
|
| CX01 | Expiry of patent term |