CN102623766A - Battery pack - Google Patents
Battery pack Download PDFInfo
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- CN102623766A CN102623766A CN2012100842602A CN201210084260A CN102623766A CN 102623766 A CN102623766 A CN 102623766A CN 2012100842602 A CN2012100842602 A CN 2012100842602A CN 201210084260 A CN201210084260 A CN 201210084260A CN 102623766 A CN102623766 A CN 102623766A
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- battery pack
- voltage
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- output
- modular converter
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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
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Abstract
The invention discloses a battery pack, which solves the problem of low cost performance of a battery pack in the prior art. The battery pack comprises a battery pack module and a DC/DC (direct current/direct current) conversion module, the battery pack module comprises a plurality of cells which are connected with each other, the positive electrode of the battery pack module is connected with an input end of the DC/DC conversion module, the negative electrode of the battery pack module is connected with a ground terminal of the DC/DC conversion module, and an output end and the ground terminal of the DC/DC conversion module serve as a voltage output port and a current output port of the battery pack. Accordingly, the DC/DC conversion module of the battery pack can convert numerical values of the voltage and the current output by the battery pack module, so that the connection mode and the number of the cells in the battery pack module can be free of limit of the output voltage and current of the battery pack, and the battery pack is simple in structure and solves the above problems.
Description
Technical field
The present invention relates to the battery design field, particularly relate to a kind of battery pack.
Background technology
The voltage and current that battery pack need be exported when operate as normal has different requirement under condition of different.At present,, that is: a plurality of electric cores are connected mutually, make the voltage and current of its output satisfy the demand of electric elements, then it is carried out the PACK encapsulation when the battery structure that needs high voltage and high electric current to adopt often is the PACK structure.Wherein, the connected mode of electric core comprises following three kinds: a plurality of electric cores all are connected in series, a plurality of electric cores all are connected in parallel, a plurality of electric cores are done the connection in series-parallel connection.
In practical application, no matter adopt above-mentioned which kind of connected mode, the voltage and current of battery pack output can only be the voltage and current after above-mentioned a plurality of electric core directly connects.Therefore, can cause the volume of battery pack excessive during up to certain degree when required voltage and electric current; Figure place after required voltage and electric current will be accurate to decimal point more for a long time; The connected mode that is used to form a plurality of electric cores of battery pack also can receive certain restriction; Make the connected mode of a plurality of electric cores too complicated; Thereby cause the structural design of battery pack too complicated, cause the cost performance of conventional battery group lower.
Summary of the invention
In view of this, the invention provides a kind of battery pack, with the complex structural designs of the battery pack that solves prior art, the problem that the cost performance of battery pack is lower.
In order to address the above problem, the technical scheme of proposition is following:
A kind of battery pack comprises:
Battery PACK module, said battery PACK module comprises a plurality of interconnected electric cores;
The DC/DC modular converter is exported behind the dc voltage value transforming numerical with said battery PACK module output;
The positive pole of said battery PACK module is connected with the input of said DC/DC modular converter;
The negative pole of said battery PACK module is connected with the earth terminal of said DC/DC modular converter;
The output and ground of said DC/DC modular converter is as the output port of the voltage and current of this battery pack.
Preferably, the magnitude of voltage of said DC/DC modular converter output is a stable voltage, and said stable voltage concrete numerical value under different imposing a condition is different.
Preferably, in the said battery PACK module connected mode of a plurality of interconnected electric cores for being connected in series.
Preferably, the specification of said a plurality of interconnected electric cores is identical.
Can find out that from above-mentioned technical scheme the disclosed battery pack of the embodiment of the invention has the DC/DC modular converter, and the DC/DC modular converter can be changed to voltage, the electric current of the output of battery PACK module, with output fixed value voltage and current.Therefore the connected mode and the electric core quantity of electric core can not receive the restriction of battery pack output voltage and electric current in the battery PACK module, thereby the structural design of electric core in the battery PACK module is become simply, and the cost performance of battery pack is had increased significantly.
Description of drawings
In order to be illustrated more clearly in the embodiment of the invention or technical scheme of the prior art; To do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below; Obviously, the accompanying drawing in describing below only is some embodiments of the present invention, for those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the disclosed battery pack of the embodiment of the invention;
Fig. 2 is the structural representation that the electric core of battery pack in the prior art is connected in parallel;
Fig. 3 is the structural representation of the electric core connection in series-parallel module of battery pack in the prior art;
Fig. 4 is the structural representation that the electric core of battery pack in the prior art is connected in series.
Embodiment
For quote and know for the purpose of, the technical term that hereinafter uses, write a Chinese character in simplified form or abridge to sum up and be explained as follows.
DC/DC transducer: DC, Direct Current, the expression DC power supply is like dry cell, on-vehicle battery etc.; The DC/DC transducer converts a direct voltage to another direct voltage with the form of circuit.
BMS:Battery Management System, battery management system.
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is the present invention's part embodiment, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
The disclosed battery pack of the embodiment of the invention has increased the DC/DC transducer on the basis of existing technology.Fig. 1 shows a kind of structure of above-mentioned battery pack, comprising: battery PACK module 11, and DC/DC modular converter 12, the positive pole of above-mentioned battery PACK module 11 is connected with the input of above-mentioned DC/DC modular converter 12; The negative pole of above-mentioned battery PACK module 11 is connected with the earth terminal of above-mentioned DC/DC modular converter 12, and the output and ground of above-mentioned DC/DC modular converter 12 is as the output port of the voltage and current of battery pack.
Wherein:
Above-mentioned battery PACK module 11 comprises a plurality of interconnected electric cores.
Above-mentioned DC/DC modular converter 12 is exported after can changing the direct voltage of battery PACK module 11 output and electric current into numerical value.Also promptly, as long as the direct voltage of battery PACK module 11 output and electric current be in DC/DC modular converter 12 acceptable scopes, DC/DC modular converter 12 can convert thereof into fixing direct voltage and current value.For example, the battery PACK module 11 that can adopt output 3V direct voltage or 4V direct voltage is connected with the DC/DC modular converter 12 of exportable fixing 5V direct voltage, realizes exporting the 5V direct voltage.It is thus clear that; The connected mode of electric core and electric core quantity can not receive the restriction of battery pack output voltage and electric current in the battery PACK module 11; Thereby make its structural design simple and flexible that becomes, improved the versatility of battery PACK module 11, and then improved the cost performance of whole battery group.
In other embodiments of the invention, concrete, the magnitude of voltage of above-mentioned DC/DC modular converter 12 outputs is a stable voltage, and the aforementioned stable magnitude of voltage is under the setting of different condition, and numerical value is different.Therefore the different stable voltage of the exportable a plurality of numerical value of this battery pack, thus the versatility and the cost performance of above-mentioned battery pack improved.
By way of example, the industrial electric tool working voltage of medium-priced is the battery-powered of 12V to 19.2V; Senior electric tool working voltage is the battery pack of 24V to 36V.In the hybrid automobile in early days, the battery voltage that is used to supply power is generally 148V; The employed battery pack of newer vehicle, voltage is up to 450V to 500V.Present embodiment can be when not changing battery PACK module 11, through DC/DC modular converter 12 output different voltages with different values.Therefore, the connected mode of a plurality of electric cores can reach fully and not receive the electric current that battery pack will export and the restriction of magnitude of voltage in the above-mentioned battery PACK module 11, thereby selects the connected mode of best electric core.
Above-mentioned a plurality of interconnected electric core can have three kinds of connected modes, is connected in series, is connected in parallel and the connection in series-parallel connection.
Preferably, in other embodiments of the invention, the connected mode of a plurality of interconnected electric cores is for being connected in series in the above-mentioned battery PACK module 11.
This be because: if the mode that adopts is for being connected in parallel; As shown in Figure 2, the lithium-ion electric core that four voltage is 1.2V is connected in parallel, and the fault of short circuit occurs when an electric core; The electric core that breaks down can exhaust the electric weight of other electric cores that are connected in parallel with it rapidly, very easily causes fire.
Connect if the mode that adopts is connection in series-parallel, connection in series-parallel module as shown in Figure 3 comprises 2 strings 2,4 electric cores also.If there are a plurality of modules as shown in Figure 3 to be connected in series mutually; In the then this connection in series-parallel syndeton, will cause 4 electric cores to lose efficacy simultaneously during an electric core short circuit, bigger to the influence of the capacity of battery PACK module 11 and voltage; And complex structure is not easy to discharge fault and keeps in repair.
For these reasons, the embodiment of the invention has adopted the connected mode that is connected in series.
In other embodiments of the invention, the specification of the electric core of above-mentioned a plurality of series connection is identical.This is to consider:
When above-mentioned a plurality of interconnected electric cores are connected in series, if the specification of above-mentioned a plurality of interconnected electric cores is different, then the performance of above-mentioned battery pack will depend on that electric core that performance is the poorest.
By way of example, as shown in Figure 4, in the battery pack of forming by four electric cores, suppose that the voltage of the 3rd electric core is 0.6V, and the voltage of other three electric cores is 1.2V.When practical application, along with the decline of operating voltage, the 3rd electric core will reach the critical point that discharge finishes faster than other electric core.In case equipment is cut off the electricity supply because of brownout; Its excess-three still intact electric core also just can not have been seen the electric weight of being stored come off; And this moment, the 3rd electric core presented very big internal resistance, if this battery pack has load, will cause the output voltage of this battery pack to descend significantly.
Based on above-mentioned consideration, the specification of a plurality of electric cores that are connected in series in the disclosed battery pack of the embodiment of the invention is identical.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the present invention.Multiple modification to these embodiment will be conspicuous concerning those skilled in the art, and defined General Principle can realize under the situation that does not break away from the spirit or scope of the present invention in other embodiments among this paper.Therefore, the present invention will can not be restricted to these embodiment shown in this paper, but will meet and principle disclosed herein and features of novelty the wideest corresponding to scope.
Claims (4)
1. a battery pack is characterized in that, comprising:
Battery PACK module, said battery PACK module comprises a plurality of interconnected electric cores;
The DC/DC modular converter is exported behind the dc voltage value transforming numerical with said battery PACK module output;
The positive pole of said battery PACK module is connected with the input of said DC/DC modular converter;
The negative pole of said battery PACK module is connected with the earth terminal of said DC/DC modular converter;
The output and ground of said DC/DC modular converter is as the output port of the voltage and current of this battery pack.
2. battery pack according to claim 1 is characterized in that, the magnitude of voltage of said DC/DC modular converter output is a stable voltage, and said stable voltage concrete numerical value under different imposing a condition is different.
3. battery pack according to claim 1 is characterized in that, the connected mode of a plurality of interconnected electric cores is for being connected in series in the said battery PACK module.
4. battery pack according to claim 1 is characterized in that the specification of said a plurality of interconnected electric cores is identical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100842602A CN102623766A (en) | 2012-03-27 | 2012-03-27 | Battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100842602A CN102623766A (en) | 2012-03-27 | 2012-03-27 | Battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102623766A true CN102623766A (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100842602A Pending CN102623766A (en) | 2012-03-27 | 2012-03-27 | Battery pack |
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| CN (1) | CN102623766A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101187680A (en) * | 2007-10-24 | 2008-05-28 | 重庆大学 | AC power system voltage sensor |
| CN101421901A (en) * | 2007-02-14 | 2009-04-29 | 株式会社理光 | Power supply circuit, charging unit having the power supply circuit, and power supply method |
| WO2011015900A1 (en) * | 2009-08-05 | 2011-02-10 | Nxp B.V. | A battery pack with integral dc-dc converter(s) |
-
2012
- 2012-03-27 CN CN2012100842602A patent/CN102623766A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101421901A (en) * | 2007-02-14 | 2009-04-29 | 株式会社理光 | Power supply circuit, charging unit having the power supply circuit, and power supply method |
| CN101187680A (en) * | 2007-10-24 | 2008-05-28 | 重庆大学 | AC power system voltage sensor |
| WO2011015900A1 (en) * | 2009-08-05 | 2011-02-10 | Nxp B.V. | A battery pack with integral dc-dc converter(s) |
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Application publication date: 20120801 |