CN207150191U - Lithium battery is used in series the mutual change-over circuit with charged in parallel - Google Patents
Lithium battery is used in series the mutual change-over circuit with charged in parallel Download PDFInfo
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- CN207150191U CN207150191U CN201720335974.4U CN201720335974U CN207150191U CN 207150191 U CN207150191 U CN 207150191U CN 201720335974 U CN201720335974 U CN 201720335974U CN 207150191 U CN207150191 U CN 207150191U
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The utility model discloses a kind of lithium battery to be used in series the mutual change-over circuit with charged in parallel, more piece rechargeable battery including series-fed, first switch is serially connected between adjacent two sections rechargeable battery, the port that the first switch is connected with GND is connected by second switch with Charge Management IC negative output terminal, the port that the first switch is connected with anode is connected by the 3rd switch with Charge Management IC positive output end, the both positive and negative polarity at the end of more piece rechargeable battery two of the series-fed connects Charge Management IC positive-negative output end respectively, the first switch, second switch and the 3rd switch are controlled by Charge Management IC input；Under normality, the first switch conducting, second switch cut-off, the 3rd switch cut-off, when the input of the Charge Management IC has power input, the cut-off of control first switch, second switch conducting, the 3rd switch conduction.The utility model has the advantages of more efficient, charging current is bigger, volume is smaller.
Description
Technical field
Charging circuit is the utility model is related to, more particularly, to a kind of more efficient, charging current is bigger, volume is smaller
Lithium battery is used in series the mutual change-over circuit with charged in parallel.
Background technology
String lithium electric equilibrium is filled what is be adjusted using balance IC in the market, and the principle of balance is：As sent out during charging
Now a wherein battery is first filled full, then the resistance that the end of battery 2 opening first satisfied is connected in parallel on the battery-end is shunted, and treats what is do not satisfied
One battery reaches when filling full state, turns off the shunt resistance for battery of first satisfying, finally reaches 2 batteries while fill full effect
Fruit.It is preferable such as in charger baby, model plane that this technology, which is applied in the non-removable product of single battery, but if used in
When on the dismountable product of single battery, when 2 battery voltage values or capability value differ greatly, because wherein a battery is too early
Reach saturation state, another low current state filled in balance, can extend on the charging interval a lot, be not optimal
Method.Because 2 lithium batteries of series connection there may be the imbalance during the imbalance artificially placed or use, charging
During, it is necessary to voltage to have been reached to that battery of rated voltage, by way of parallel power shunt resistance, treat that voltage is low
Battery reach rated voltage after, the mode of constant-current charge could be entered together, can be very long the charging interval on, and because of adding
High-power resistance, cause pcb board area small, its volume taken is also just larger, cannot be used in some miniaturized products
The technology.
The content of the invention
The shortcomings that to overcome prior art, the utility model purpose be to provide a kind of more efficient, charging current it is bigger,
The smaller lithium battery of volume is used in series the mutual change-over circuit with charged in parallel.
The utility model realizes that a kind of lithium battery is used in series to be turned with the mutual of charged in parallel by following technical measures
Circuit is changed, includes the more piece rechargeable battery of series-fed, is serially connected with first switch between adjacent two sections rechargeable battery, described first
The port that is connected with GND is switched to be connected with Charge Management IC negative output terminal by second switch, the first switch and
The port of anode connection is connected by the 3rd switch with Charge Management IC positive output end, and the more piece of the series-fed is filled
The both positive and negative polarity at the end of battery two connects Charge Management IC positive-negative output end, the first switch, second switch and the 3rd respectively
Switch is controlled by Charge Management IC input；Under normality, the first switch conducting, second switch cut-off, the 3rd switch are cut
Only, when the input of the Charge Management IC has power input, the cut-off of control first switch, second switch conducting, the 3rd switch
Conducting.
As a kind of preferred embodiment, when the input of the Charge Management IC has power input, the first switch is cut
Only speed is at least faster than the conducting speed of the 3rd switch.
As a kind of preferred embodiment, during the power-off of the input of the Charge Management IC, the cut-off of the 3rd switch prior to
The conducting of first switch.
As a kind of preferred embodiment, during the power-off of the input of the Charge Management IC, the after the 3rd switch cut-off 1 second
One switch turns on again.
As a kind of preferred embodiment, the first switch, second switch and the 3rd switch are made up of multiple metal-oxide-semiconductors respectively.
The utility model is in power supply, and first switch conducting, second switch cut-off, the 3rd switch cut-off are more by what is connected
Batteries are powered for equipment；When needing to charge for battery, Charge Management IC input has power input, and makes first switch
Cut-off, second switch conducting, the 3rd switch conduction, multiple batteries go to charged in parallel state, so as to realize that it is full that Fast-Balance fills
Effect.In the utility model, no matter multiple batteries it is uneven in use or artificial placed different capabilities not
With the lithium battery of voltage, as long as plugging charging voltage, all batteries can be switched to parallel way by circuit, by unbalanced more
Mutual charging inside batteries, all batteries are reached into an interim poised state, then, then the essence by Charge Management IC
Close control, reach all batteries and all quickly fill full effect.This charging circuit is switch power supply type single lithium battery charging scheme,
Compared in the market linear-charging IC have it is more efficient (more than 93%, linear-charging scheme is less efficient, less than 80%), fill
Electric current bigger (more than 3A, linear-charging scheme maximum current can only accomplish 1A), the advantages that volume is smaller.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the utility model embodiment.
Fig. 2 is the physical circuit principle schematic of another embodiment change-over circuit of the utility model.
Embodiment
With reference to embodiment and compare accompanying drawing the utility model is described in further detail.
A kind of lithium battery is used in series the mutual change-over circuit with charged in parallel, with reference to two sections of figure 1, including series-fed
Rechargeable battery BAT1, BAT2, first switch K1, the first switch K1 and battery BAT1 negative poles are serially connected between two rechargeable batteries
The port of connection is connected by second switch K2 with Charge Management IC negative output terminal, and the first switch K1 and battery BAT2 is just
The port of pole connection is connected by the 3rd switch K3 with Charge Management IC positive output end, the positive pole and battery of the battery BAT1
BAT2 negative pole connects Charge Management IC positive and negative output end, the first switch K1, second switch K2 and the 3rd switch respectively
K3 is controlled by Charge Management IC input；Under normality, the first switch K1 conductings, second switch K2 cut-offs, the 3rd switch
K3 ends, when the input of the Charge Management IC has power input, control first switch K1 ends, second switch K2 is turned on,
3rd switch K3 conductings.It is in the present embodiment two section 3.7V batteries being connected in series, in other embodiments, or more
The battery of multi-section serial, charging voltage in the present embodiment is 5V.
In this circuit, usually, first switch K1 conductings, second switch K2 cut-offs, the 3rd switch K3 cut-offs, by what is connected
Multiple batteries are powered for equipment；When needing to charge for battery, 5V inputs connect cradle, and Charge Management IC input has electricity
Source inputs, and makes first switch K1 cut-offs, second switch K2 conductings, the 3rd switch K3 conductings, and 2 lithium batteries go to charged in parallel
State, so as to realize that Fast-Balance fills full effect.In this circuit, no matter 2 section lithium batteries it is uneven in use or
Artificial placed the lithium battery of different capabilities difference voltage, as long as plugging charging voltage, circuit can switch to 2 batteries simultaneously
Connection mode, by the mutual charging of unbalanced 2 inside batteries, 2 batteries are reached into an interim poised state, then,
Again by Charge Management IC (SY6935) accurate control, reach 2 batteries and all quickly fill full effect.This charging circuit is to open
Close power type single lithium battery charging scheme, compared in the market linear-charging IC have it is more efficient (more than 93%, linearly fill
Electric scheme is less efficient, less than 80%), charging current bigger (more than 3A, linear-charging scheme maximum current can only accomplish 1A),
The advantages that volume is smaller.
In the present embodiment, it is specific on the basis of previous technique scheme it is also possible that the control of the 3rd switch with reference to figure 1
Access one first electric capacity between end and ground, and be connected with one in first switch K1 control terminal and formed by resistance and the second electric capacity
Delay circuit, when Charge Management IC input has power input, first charged before the switch of control the 3rd K3 to the first electric capacity,
So that first switch K1 quick cut-off is fast, the 3rd switch K3 slow conducting；When Charge Management IC input power-off,
Turned on again after first switch K1 delays.
Fig. 2 is the physical circuit principle schematic of another embodiment change-over circuit, is had on the basis of previous technique scheme
Body is also possible that first switch K1 is made up of multiple metal-oxide-semiconductor Q3 and Q4, and second switch K2 is made up of multiple metal-oxide-semiconductor Q1 and Q2, the
Three switch K3 are made up of multiple metal-oxide-semiconductor Q5, Q6 and Q7.
The process that series connection turns in parallel is as follows：
1. as shown in Fig. 2 when the 5V that charges is accessed, Q1, Q2 fast conducting, Q3, Q4 quickly end, serial lithium battery BAT1
Intermediate loop with BAT2 is cut off.
2. at the same time, when the 5V that charges is accessed, Q5, Q6 and Q7 are turned on slowly, and lithium battery BAT1 negative pole is connected into ground, will
Lithium battery BAT2 positive pole is connected to lithium battery BAT1 positive pole, so as to reach the lithium battery that 2 are connected and the process connect.
3. by controlling SY6935EN (PIN7 pin) to open charge function, you can start to charge up.
4. as long as charging 5V signals exist always, 2 batteries mode in parallel is constant always
The process that parallel connection turns series connection is as follows：
5. when the 5V that charges is pulled out, Q1 and Q2 are rapidly switched off, and Q3 and Q4 are because the R3 and C1 of G poles form an about 1ms left side
Right delay circuit, i.e. Q3 and Q4 are just opened after 1ms,
6. at the same time, when the 5V that charges is pulled out, the voltage on C1 completes repid discharge by D1, then Q5, Q6 and Q7
Rapidly switch off, complete the series connection of 2 batteries.
It is set forth, uses with the mutual change-over circuit of charged in parallel above is being used in series to the utility model lithium battery
In helping to understand the utility model, but embodiment of the present utility model and be not restricted to the described embodiments, it is any without departing from
Change, modification, replacement, combination, the simplification made under the utility model principle, should be equivalent substitute mode, are included in
Within the scope of protection of the utility model.
Claims (2)
1. a kind of lithium battery is used in series the mutual change-over circuit with charged in parallel, it is characterised in that：Including the more of series-fed
Rechargeable battery is saved, first switch, the end that the first switch is connected with GND are serially connected between adjacent two sections rechargeable battery
Mouth is connected by second switch with Charge Management IC negative output terminal, and the port that the first switch is connected with anode passes through
3rd switch is connected with Charge Management IC positive output end, the both positive and negative polarity difference at the end of more piece rechargeable battery two of the series-fed
Charge Management IC positive-negative output end is connected, the first switch, second switch and the 3rd switch are controlled by Charge Management IC's
Input.
2. lithium battery according to claim 1 is used in series the mutual change-over circuit with charged in parallel, it is characterised in that：Institute
First switch, second switch and the 3rd switch is stated to be made up of multiple metal-oxide-semiconductors respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720335974.4U CN207150191U (en) | 2017-03-31 | 2017-03-31 | Lithium battery is used in series the mutual change-over circuit with charged in parallel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720335974.4U CN207150191U (en) | 2017-03-31 | 2017-03-31 | Lithium battery is used in series the mutual change-over circuit with charged in parallel |
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| CN207150191U true CN207150191U (en) | 2018-03-27 |
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| CN201720335974.4U Active CN207150191U (en) | 2017-03-31 | 2017-03-31 | Lithium battery is used in series the mutual change-over circuit with charged in parallel |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146831A (en) * | 2018-10-22 | 2020-05-12 | 凹凸电子（武汉）有限公司 | Mobile device, battery management circuit and battery management method |
| EP4131710A4 (en) * | 2020-06-09 | 2024-05-29 | ZTE Corporation | Hybrid battery system |
-
2017
- 2017-03-31 CN CN201720335974.4U patent/CN207150191U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111146831A (en) * | 2018-10-22 | 2020-05-12 | 凹凸电子（武汉）有限公司 | Mobile device, battery management circuit and battery management method |
| CN111146831B (en) * | 2018-10-22 | 2022-05-17 | 北京大瞬科技有限公司 | Mobile device, battery management circuit and battery management method |
| EP4131710A4 (en) * | 2020-06-09 | 2024-05-29 | ZTE Corporation | Hybrid battery system |
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| GR01 | Patent grant | ||
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Address after: 518000 2 / F and 3 / F, west side of building a, Xinghong science and Technology Park, 111 Reservoir Road, fenghuanggang community, Xixiang street, Bao'an District, Shenzhen City, Guangdong Province Patentee after: Shenzhen langheng Lighting Technology Co.,Ltd. Address before: 8 / F, building 2, dongfangming industrial city, 83 Dabao Road, Xin'an 33 District, Bao'an District, Shenzhen, Guangdong 518000 Patentee before: SHENZHEN LANGHENG ELECTRICAL Co.,Ltd. |