CN104600766A - Mobile power supply with series connection design - Google Patents

Mobile power supply with series connection design Download PDF

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Publication number
CN104600766A
CN104600766A CN201310534515.5A CN201310534515A CN104600766A CN 104600766 A CN104600766 A CN 104600766A CN 201310534515 A CN201310534515 A CN 201310534515A CN 104600766 A CN104600766 A CN 104600766A
Authority
CN
China
Prior art keywords
battery
voltage
serial connection
electric power
mobile electric
Prior art date
Application number
CN201310534515.5A
Other languages
Chinese (zh)
Inventor
张文祥
杨俊良
林明杰
郭融
徐盟贵
Original Assignee
恒耀能源股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 恒耀能源股份有限公司 filed Critical 恒耀能源股份有限公司
Priority to CN201310534515.5A priority Critical patent/CN104600766A/en
Publication of CN104600766A publication Critical patent/CN104600766A/en

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Classifications

    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0063Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with circuits adapted for supplying loads from the battery
    • H02J2007/0067Discharge management, i.e. discharge current reduction at low state of charge, sequential battery discharge in systems with a plurality of battery
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2207/00Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J2207/20Charging or discharging characterised by the power electronics converter

Abstract

The invention discloses a mobile power supply with a series connection design, which is applied to providing a discharge voltage to charge an electronic product, and includes a plurality of rechargeable batteries and a voltage regulation circuit. The batteries are mutually serially connected end to end between a first battery end and a second battery end. The voltage regulation circuit is electrically connected with the first battery end and a second battery end for receiving the voltage difference between the first battery end and the second battery end, and providing voltage to the electronic product after reducing the voltage to be the discharge voltage. Through serially connecting the batteries and combining with the voltage regulation circuit to perform voltage reduction output, the current load and the risk in use when charging can be reduced, and the better energy utilization rate can be obtained.

Description

The Mobile electric power of application serial connection design

Technical field

The present invention relates to a kind of Mobile electric power, particularly relate to the Mobile electric power of a kind of application serial connection design

Background technology

Consult Fig. 1, the battery 11 of inside can use and connect design by current Mobile electric power, but when will increase the quantity of battery 11 when the charge capacity that will increase Mobile electric power, just external charging circuit 12 can be caused when charging to Mobile electric power, larger charging current can be needed, for in Fig. 1, when supposing to only have single battery, required charging current is 1A, and connect when being two batteries 11, then altogether need the charging current of 2A, that is twice when charging current increases to an originally battery 11, if and battery 11 quantity connect increases to three, four ... individual, then required charging current more can rise to originally three, four ... doubly, this can cause the burden of charging circuit 12 significantly to improve, moreover, big current easily causes circuit to generate heat, cause scorification and cause danger time even serious.

Summary of the invention

The object of the present invention is to provide a kind of Mobile electric power of the application serial connection design solved the problem.

The present invention applies the Mobile electric power of serial connection design, is applicable to provide a discharge voltage with to an electronic product charging, this action power supply comprise multiple can the battery of recharge.

Described battery is serially connected with between first battery-end and second battery-end mutually end to end.

This action power supply also comprises a voltage-regulating circuit, and this voltage-regulating circuit is electrically connected this first battery-end and this second battery-end, receives the voltage difference between this first battery-end and this second battery-end, and provide this electronic product after step-down is for this discharge voltage.

The Mobile electric power of application serial connection of the present invention design, described battery is iron lithium phosphate battery.

The Mobile electric power of application serial connection of the present invention design, described number of batteries is two.

The Mobile electric power of application of the present invention serial connection design, the voltage difference between this first battery-end and this second battery-end and the ratio of this discharge voltage are greater than 1.2.

The Mobile electric power of application of the present invention serial connection design, this number of battery serial connection of recharge can be more than or equal to two.

The Mobile electric power of application of the present invention serial connection design, the voltage difference between this first battery-end and this second battery-end and the ratio of this discharge voltage are greater than 2.

The Mobile electric power of application of the present invention serial connection design, this number of battery serial connection of recharge can be more than or equal to four.

Beneficial effect of the present invention is: by described battery serial connection being arranged, and this voltage-regulating circuit of arranging in pairs or groups makes reduced output voltage, the danger that electric current when can reduce charging is born and used, and obtains preferably energy utilization rate.

Accompanying drawing explanation

Fig. 1 is the schematic diagram of existing a kind of Mobile electric power;

Fig. 2 is the schematic diagram of a preferred embodiment when discharging that the present invention applies the Mobile electric power of serial connection design;

Fig. 3 is the schematic diagram of this preferred embodiment when charging; And

Fig. 4 is the schematic diagram of another form of this preferred embodiment.

Embodiment

Below in conjunction with drawings and Examples, the present invention is described in detail:

Consult Fig. 2 and Fig. 3, the preferred embodiment that the present invention applies the Mobile electric power of serial connection design is applicable to provide a discharge voltage to charge to an electronic product 8, and be applicable to charge by a charging circuit 9, this charging circuit 9 provides a charging current, this action power supply comprise multiple can the battery 2 of recharge and a voltage-regulating circuit 3.

Described battery 2 is serially connected with between first battery-end 21 and second battery-end 22 mutually end to end.

In the present embodiment, described battery 2 is iron lithium phosphate battery (Lithium ironphosphate, molecular formula: LiFePO4, be called for short LFP, also known as LiFePO4, lithium iron phosphorus), because iron lithium phosphate battery has the characteristic of quickly-chargeable and big current, holding concurrently to have, price is large compared with capacitance under low, Unit Weight, stability is high, the advantage of long service life, therefore extremely has the advantage that field of power supplies in action develops.

This voltage-regulating circuit 3 is electrically connected this first battery-end 21 and this second battery-end 22, receives the voltage difference between this first battery-end 21 and this second battery-end 22, and after step-down is for this discharge voltage, provides this electronic product 8.

During general use, the electric energy stored by battery 2 of this action power supply can be sent to this voltage-regulating circuit 3 by this first battery-end 21 and this second battery-end 22, because the voltage of general iron lithium phosphate battery 2 is about 3.2V, therefore as shown in Figure 2, after being connected in series two iron lithium phosphate batteries 2, be 6.4V in the voltage difference of this first battery-end 21 and this second battery-end 22, and general electronic products uses universal serial bus standard (the UniversalSerial Bus of 5V, be abbreviated as USB) as transport interface, therefore again electronic product 8 is charged after must carrying out step-down via this voltage-regulating circuit 3, when series connection two batteries 2, voltage difference between this first battery-end 21 and this second battery-end 22 and the ratio of this discharge voltage are (3.2Vx2)/5V=1.28 (being greater than 1.2).

By boost conversion, the voltage of 3.2V must be risen to 5V in prior art, the conversion efficiency of step-down conversion is higher, can obtain preferably energy utilization rate.

As shown in Figure 3, after the reserve of electricity of this action power supply reduces, then charge by this action power supply being connected to this charging circuit 9, because described battery 2 is serial connection design, even if when therefore will increase the charge capacity of Mobile electric power and increase the quantity of battery 2 serial connection, this charging current still can maintain current value during serial connection single battery 2 substantially, for in Fig. 3, when only having single battery, required charging current is 1A, serial connection is two batteries 2 or three, four ... when individual battery more than 2, required charging current is still 1A, must not rise with battery 2 quantity of serial connection.

When being applied to fast mold filling formula, with the capacity of a battery 2 for 2500mAh is as explanation, when serial connection two batteries 2 and when using fast mold filling formula, required charging current is 5A; When serial connection three or four batteries 2, required charging current still remains 5A.

If as existing use Parallel Design, when battery 2 quantity of parallel connection is two, and when using fast mold filling formula, required charging current will be 10A; When battery 2 quantity of parallel connection is three, when using fast mold filling formula, required charging current then can up to 15A.

From the above, compared to prior art, the charging current significantly increased of not only can avoiding the present embodiment causes the burden of this charging circuit 9 and the danger used, the degree of difficulty reduced in circuit design, and can not increase and in fact battery 2 is filled the full charging interval.

Consult Fig. 4, in fail safe with under the design consideration not increasing battery 2 volume, under the restriction maintaining total capacity 5000mAh and total charging current 5A, battery 2 number is increased, such as series connection two capacity are the battery 2 of 2500mAh originally, replace with the battery 2 of series connection four 1250mAh, so can be constant in the total capacity of battery 2, when charging current 5A also remains unchanged substantially, reduce the charging interval of about half, effect of quick charge can be reached, now, voltage difference between this first battery-end 21 and this second battery-end 22 and the ratio of this discharge voltage are (3.2Vx4)/5V=2.56 (being greater than 2).

If use existing Parallel Design on the contrary, suppose the battery (not shown) of four 1250mAh in parallel, but the restriction of total current 5A makes the charging current of each battery remain 1.25A, so can't accelerate charging rate.

It is worth mentioning that, the object that battery 2 is connected in series by the present invention, is not because single battery 2 voltage 3.2V is not enough to required discharge voltage 5V and is purely connected in series boosting.The present invention will reach by being connected in series to charge to multiple battery 2 simultaneously, to reach the effect reducing charging current and accelerate charging rate, also the voltage difference between this first battery-end 21 and this second battery-end 22 therefore can be made far to exceed the discharge voltage of demand, so when battery 2 number of serial connection increases, the ratio of the voltage difference between this first battery-end 21 and this second battery-end 22 and this discharge voltage can be made to be greater than to a certain degree (as 1.2 or 2), also to represent that the advantage that serial connection produces and effect can be more obvious.

In sum, the present invention not only can reduce this charging circuit 9 electric current burden and the danger used, the degree of difficulty reduced in circuit design, obtain preferably energy utilization rate, also the charging interval can be reduced, and after collocation iron lithium phosphate battery, have more the advantage that field of power supplies in action develops, so really object of the present invention can be reached.

Claims (7)

1. apply a Mobile electric power for serial connection design, be applicable to provide a discharge voltage with to an electronic product charging, this action power supply comprise multiple can the battery of recharge; It is characterized in that:
Described battery is serially connected with between first battery-end and second battery-end mutually end to end;
This action power supply also comprises a voltage-regulating circuit, and this voltage-regulating circuit is electrically connected this first battery-end and this second battery-end, receives the voltage difference between this first battery-end and this second battery-end, and provide this electronic product after step-down is for this discharge voltage.
2. the Mobile electric power of application serial connection as claimed in claim 1 design, is characterized in that: described battery is iron lithium phosphate battery.
3. the Mobile electric power of application serial connection as claimed in claim 2 design, is characterized in that: described number of batteries is two.
4. the Mobile electric power of application serial connection as claimed in claim 2 design, is characterized in that: the voltage difference between this first battery-end and this second battery-end and the ratio of this discharge voltage are greater than 1.2.
5. the Mobile electric power of application serial connection as claimed in claim 4 design, is characterized in that: this number of battery serial connection of recharge can be more than or equal to two.
6. the Mobile electric power of application serial connection as claimed in claim 2 design, is characterized in that: the voltage difference between this first battery-end and this second battery-end and the ratio of this discharge voltage are greater than 2.
7. the Mobile electric power of application serial connection as claimed in claim 6 design, is characterized in that: this number of battery serial connection of recharge can be more than or equal to four.
CN201310534515.5A 2013-11-01 2013-11-01 Mobile power supply with series connection design CN104600766A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201310534515.5A CN104600766A (en) 2013-11-01 2013-11-01 Mobile power supply with series connection design

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201310534515.5A CN104600766A (en) 2013-11-01 2013-11-01 Mobile power supply with series connection design

Publications (1)

Publication Number Publication Date
CN104600766A true CN104600766A (en) 2015-05-06

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101685974A (en) * 2008-09-28 2010-03-31 徐建华 Mobile power supply
CN202651818U (en) * 2012-05-09 2013-01-02 厦门广开电子有限公司 Multipath output mobile power supply
CN103094958A (en) * 2012-12-28 2013-05-08 肖俊仙 Multifunctional mobile power supply and multifunctional mobile power supply circuit
CN103138345A (en) * 2013-01-23 2013-06-05 蔡吕乾 Mobile power supply and conversion device thereof
CN103219778A (en) * 2013-05-02 2013-07-24 杭州电子科技大学 5V output mobile power supply

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101685974A (en) * 2008-09-28 2010-03-31 徐建华 Mobile power supply
CN202651818U (en) * 2012-05-09 2013-01-02 厦门广开电子有限公司 Multipath output mobile power supply
CN103094958A (en) * 2012-12-28 2013-05-08 肖俊仙 Multifunctional mobile power supply and multifunctional mobile power supply circuit
CN103138345A (en) * 2013-01-23 2013-06-05 蔡吕乾 Mobile power supply and conversion device thereof
CN103219778A (en) * 2013-05-02 2013-07-24 杭州电子科技大学 5V output mobile power supply

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