CN206865182U - A kind of binodal lithium battery charging system - Google Patents
A kind of binodal lithium battery charging system Download PDFInfo
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- CN206865182U CN206865182U CN201720665695.4U CN201720665695U CN206865182U CN 206865182 U CN206865182 U CN 206865182U CN 201720665695 U CN201720665695 U CN 201720665695U CN 206865182 U CN206865182 U CN 206865182U
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- lithium battery
- charging system
- charge management
- charging
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Abstract
The utility model discloses a kind of binodal lithium battery charging system, belong to communication technical field.The binodal lithium battery charging system includes：For connecting the USB charging inlets of external power source, one DC/DC for being used for conversion dc voltage, two Charge Management IC for being used to manage charging and discharging lithium battery, two lithium batteries for being used to save electricity, above-mentioned USB charging inlets connect two lithium batteries respectively by one end of the Charge Management IC of DC/DC connections two, the two Charge Management IC other end.The utility model solves that binodal lithium cell charging present in prior art is unbalanced, and the battery for causing first to be filled usually is in overcharging state, influences the technical problem of battery life；Two section lithium battery charge independences are realized, no matter which section lithium battery first full of can then stop charging, effectively prevents from overcharging the technique effect for bringing infringement to lithium battery.
Description
Technical field
Communication technical field is the utility model is related to, more particularly to a kind of binodal lithium battery charging system.
Background technology
With scientific and technological progress and social development, such as smart mobile phone, notebook computer, bluetooth earphone, Intelligent bracelet, MP3
The portable mobile apparatus such as player, DV are increasingly popularized, and this electronic product is nearly all charged using USB interface
Mode, but problems be present in the binodal lithium cell charging scheme for being currently based on 5V-USB interfaces：
Scheme one is current binodal lithium battery (or multisection lithium battery), as shown in figure 1, more when being charged by 5V-USB interfaces
After boosting to 9V or 12V using Boost circuit, Charge Management IC, Charge Management IC is given to be charged directly to the battery of two section series connection.
If the initial quantity of electricity of two batteries differs greatly, a batteries can be caused first to be filled, now another batteries do not have also
It is full of, the battery being filled then is in overcharging state, influences battery life.
Second scheme is to realize the charging modes of relative equilibrium using resistance on the basis of scheme one, as shown in Fig. 2
But the charging modes ability of equalization for setting up resistance is limited, and Boost circuit output voltage ripple is larger, the effect of charge balancing compared with
Difference, serious efficiency of generating heat are low.
Utility model content
Unbalanced in order to solve binodal lithium cell charging present in prior art, the battery for causing first to be filled usually is located
In overcharging state, the technical problem of battery life is influenceed, the utility model embodiment provides a kind of binodal lithium cell charging system
System.The technical scheme is as follows：
A kind of binodal lithium battery charging system, the charging system include：
For connecting the USB charging inlets of external power source, a DC/DC for being used for conversion dc voltage, two are used to manage
The Charge Management IC of charging and discharging lithium battery is managed, two lithium batteries for being used to save electricity, above-mentioned USB charging inlets pass through described
The Charge Management IC of DC/DC connections two one end, the two Charge Management IC other end connect described in two respectively
Lithium battery.
The beneficial effect brought of technical scheme that the utility model embodiment provides is：
By binodal lithium battery charging system, including：For connecting the USB charging inlets of external power source, one is used to turn
Change the DC/DC of DC voltage, two Charge Management IC for being used to manage charging and discharging lithium battery, two lithium electricity for being used to save electricity
Pond, above-mentioned USB charging inlets pass through one end of the Charge Management IC of DC/DC connections two, two Charge Managements
The IC other end connects two lithium batteries respectively；It is unbalanced to solve binodal lithium cell charging present in prior art,
The battery for causing first to be filled usually is in overcharging state, influences the technical problem of battery life；It is only to realize two section lithium batteries
Vertical charging, no matter which section lithium battery first full of can then stop charging, effectively prevents from overcharging the technology for bringing infringement to lithium battery
Effect.
Brief description of the drawings
, below will be to needed for embodiment description in order to illustrate more clearly of the technical scheme in the embodiment of the utility model
The accompanying drawing to be used is briefly described, it should be apparent that, drawings in the following description are only some realities of the present utility model
Example is applied, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to these accompanying drawings
Obtain other accompanying drawings.
Fig. 1 is the circuit structure diagram that prior art one provides；
Fig. 2 is the circuit structure diagram that prior art two provides；
Fig. 3 is the circuit structure diagram for the binodal lithium battery charging system that the utility model embodiment one provides；
Fig. 4 is the circuit structure diagram for the binodal lithium battery charging system that the utility model embodiment two provides.
Embodiment
It is new to this practicality below in conjunction with accompanying drawing to make the purpose of this utility model, technical scheme and advantage clearer
Type embodiment is described in further detail.
The utility model binodal lithium battery charging system, including：For connecting the USB charging inlets of external power source, one
For the DC/DC of conversion dc voltage, two Charge Management IC for being used to manage charging and discharging lithium battery, two are used to save electricity
Lithium battery, for above-mentioned USB charging inlets by two Charge Management IC of DC/DC connections one end, two Charge Management IC's is another
One end connects two lithium batteries respectively.
The utility model need not realize the Charge Management of two section lithium batteries by boosting principle, the method for realization be by
The scheme that the lithium battery of two section series connection charges according to single lithium battery is charged, it is only necessary to isolation processing is carried out in mains side,
Then the states of lithium cell chargings of two section series connection can be separate, and no matter which section lithium battery is first full of, all without occurring
Fill or charge unbalanced phenomenon.
Embodiment one
Fig. 3 is refer to, it illustrates the binodal lithium battery charging system that the utility model embodiment one provides, the binodal lithium
Batter-charghing system includes：
For connecting the USB charging inlets of external power source, a DC/DC for being used for conversion dc voltage, two are used to manage
The Charge Management IC of charging and discharging lithium battery, two lithium batteries for being used to save electricity are managed, above-mentioned DC/DC includes input and one all the way
Road exports, and USB charging inlets connect DC/DC input, and the input of the DC/DC connects the first Charge Management IC one end,
The first Charge Management IC other end connects the both ends of the first lithium battery；DC/DC output end connects the second Charge Management IC's
One end, the second Charge Management IC other end connect the both ends of the second lithium battery.
USB_5V points are two-way, are used to connect the Charge Management IC being connected with low-pressure side lithium battery (Battery_1) all the way,
The low-pressure side lithium battery realizes charge independence；Another way gives high-pressure side lithium battery (Battery_2), due to system earth
Low-pressure side lithium battery is connected, then high-pressure side needs to realize Charge Management IC power supply of the decompression to connection using DC-DC insulating power supplies
(being converted to 4.6V from 5V).After DC-DC is converted, output voltage 4.6V.
DC-DC can select current FlyBuck types structure or push-pull type topological structure to realize.
Wherein, DC-DC isolating transformer can use PCB plane transformer to realize or using the less EE16 magnetic cores of encapsulation
Skeleton transformer is realized.
Charging IC can be with selecting switch formula Charge Management IC (MPS2615) or linear-charging management IC (BQ24090).
Battery in figure has been battery for encapsulated MOS and IC, and realization principle is fairly simple, and project plan comparison is ripe, can be with
The suitable protection voltage of selection and protective current according to the actual requirements.
In summary, by binodal lithium battery charging system, including：For connecting the USB charging inlets of external power source, one
The individual DC/DC for conversion dc voltage, two Charge Management IC for being used to manage charging and discharging lithium battery, two are used to save electricity
The lithium battery of amount, above-mentioned USB charging inlets are by one end of the Charge Management IC of DC/DC connections two, described in two
The Charge Management IC other end connects two lithium batteries respectively；Solves binodal lithium cell charging present in prior art
Unbalanced, the battery for causing first to be filled usually is in overcharging state, influences the technical problem of battery life；Realize two section lithiums
Battery charge independence, no matter which section lithium battery first full of can then stop charging, effectively prevents from overcharging and brings infringement to lithium battery
Technique effect.
Embodiment two
Fig. 4 is refer to, it illustrates the binodal lithium battery charging system that the utility model embodiment two provides, the binodal lithium
Batter-charghing system includes：
For connecting the USB charging inlets of external power source, a DC/DC for being used for conversion dc voltage, two are used to manage
The Charge Management IC of charging and discharging lithium battery is managed, two lithium batteries for being used to save electricity, it is defeated with two-way that DC/DC includes input all the way
Going out, USB charging inlets connect DC/DC input, and DC/DC the first output end connects the first Charge Management IC one end, the
The one Charge Management IC other end connects the both ends of the first lithium battery；DC/DC the second output end connects the second Charge Management IC
One end, the second Charge Management IC other end connects the both ends of the second lithium battery.
USB_5V points are two-way, are used to connect the Charge Management IC being connected with low-pressure side lithium battery (Battery_1) all the way,
The low-pressure side lithium battery realizes charge independence；Another way gives high-pressure side lithium battery (Battery_2), due to system earth
Low-pressure side lithium battery is connected, then high-pressure side needs to realize Charge Management IC power supply of the decompression to connection using DC-DC insulating power supplies
(being converted to 4.6V from 5V).After DC-DC is converted, output voltage 4.6V.
DC-DC can select current FlyBuck types structure or push-pull type topological structure to realize.
Wherein, DC-DC isolating transformer can use PCB plane transformer to realize or using the less EE16 magnetic cores of encapsulation
Skeleton transformer is realized.
Charging IC can be with selecting switch formula Charge Management IC (MPS2615) or linear-charging management IC (BQ24090).
Battery in figure has been battery for encapsulated MOS and IC, and realization principle is fairly simple, and project plan comparison is ripe, can be with
The suitable protection voltage of selection and protective current according to the actual requirements.
In summary, by binodal lithium battery charging system, including：For connecting the USB charging inlets of external power source, one
The individual DC/DC for conversion dc voltage, two Charge Management IC for being used to manage charging and discharging lithium battery, two are used to save electricity
The lithium battery of amount, above-mentioned USB charging inlets are by one end of the Charge Management IC of DC/DC connections two, described in two
The Charge Management IC other end connects two lithium batteries respectively；Solves binodal lithium cell charging present in prior art
Unbalanced, the battery for causing first to be filled usually is in overcharging state, influences the technical problem of battery life；Realize two section lithiums
Battery charge independence, no matter which section lithium battery first full of can then stop charging, effectively prevents from overcharging and brings infringement to lithium battery
Technique effect.
Above-mentioned the utility model embodiment sequence number is for illustration only, does not represent the quality of embodiment.
One of ordinary skill in the art will appreciate that hardware can be passed through by realizing all or part of step of above-described embodiment
To complete, by program the hardware of correlation can also be instructed to complete, described program can be stored in a kind of computer-readable
In storage medium, storage medium mentioned above can be read-only storage, disk or CD etc..
Preferred embodiment of the present utility model is the foregoing is only, it is all in this practicality not to limit the utility model
Within new spirit and principle, any modification, equivalent substitution and improvements made etc., guarantor of the present utility model should be included in
Within the scope of shield.
Claims (9)
1. a kind of binodal lithium battery charging system, it is characterised in that the charging system includes：
For connecting the USB charging inlets of external power source, a DC/DC for being used for conversion dc voltage, two are used to manage lithium
The Charge Management IC of battery charging and discharging, two lithium batteries for being used to save electricity,
Above-mentioned USB charging inlets pass through one end of the Charge Management IC of DC/DC connections two, two Charge Managements
The IC other end connects two lithium batteries respectively.
2. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The DC/DC includes input all the way with exporting all the way,
The USB charging inlets connect the input of the DC/DC, and the input of the DC/DC connects the first Charge Management IC's
One end, the other end of the first Charge Management IC connect the both ends of the first lithium battery；The output end connection second of the DC/DC
Charge Management IC one end, the other end of the second Charge Management IC connect the both ends of the second lithium battery.
3. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The DC/DC includes input all the way and exported with two-way,
The USB charging inlets connect the input of the DC/DC, and the first output end of the DC/DC connects the first charging valve
IC one end is managed, the other end of the first Charge Management IC connects the both ends of the first lithium battery；The second output of the DC/DC
The second Charge Management IC of end connection one end, the other end of the second Charge Management IC connect the both ends of the second lithium battery.
4. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The DC/DC is FlyBuck type structures.
5. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The DC/DC is push-pull type topological structure.
6. the binodal lithium battery charging system according to claim 4 or 5, it is characterised in that the charging system also includes：
The isolating transformer of the DC/DC is PCB plane transformer.
7. the binodal lithium battery charging system according to claim 4 or 5, it is characterised in that the charging system also includes：
The isolating transformer of the DC/DC is magnetic core framework transformer.
8. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The Charge Management IC is switching regulator Charge Management IC.
9. binodal lithium battery charging system according to claim 1, it is characterised in that the charging system also includes：
The Charge Management IC is that linear-charging manages IC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720665695.4U CN206865182U (en) | 2017-06-08 | 2017-06-08 | A kind of binodal lithium battery charging system |
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| CN201720665695.4U CN206865182U (en) | 2017-06-08 | 2017-06-08 | A kind of binodal lithium battery charging system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192377A1 (en) * | 2019-03-27 | 2020-10-01 | 上海爻火微电子有限公司 | Earphone charging circuit, and earphone charging case |
-
2017
- 2017-06-08 CN CN201720665695.4U patent/CN206865182U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020192377A1 (en) * | 2019-03-27 | 2020-10-01 | 上海爻火微电子有限公司 | Earphone charging circuit, and earphone charging case |
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