CN107863802B - Battery charging and discharging circuit - Google Patents
Battery charging and discharging circuit Download PDFInfo
- Publication number
- CN107863802B CN107863802B CN201711186630.2A CN201711186630A CN107863802B CN 107863802 B CN107863802 B CN 107863802B CN 201711186630 A CN201711186630 A CN 201711186630A CN 107863802 B CN107863802 B CN 107863802B
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- switch
- stage circuit
- power stage
- load
- battery pack
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- 238000007599 discharging Methods 0.000 title claims abstract description 21
- 230000002457 bidirectional effect Effects 0.000 claims description 4
- 230000000903 blocking effect Effects 0.000 claims description 4
- 238000004146 energy storage Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000010354 integration Effects 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0068—Battery or charger load switching, e.g. concurrent charging and load supply
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J2207/00—Indexing scheme relating to details of circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J2207/20—Charging or discharging characterised by the power electronics converter
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a battery charging and discharging circuit which comprises a power stage circuit, a first switch and a second switch, wherein a first input end of the power stage circuit is connected with a high-potential end of an input voltage, a second input end of the power stage circuit is connected with a low-potential end of the input voltage, a first output end of the power stage circuit is connected with one end of the first switch, the other end of the first switch is connected with a positive electrode of a battery pack, a negative electrode of the battery pack is connected with a second output end of the power stage circuit, a load is connected with an output end of the power stage circuit, one end of the second switch is connected with a common end of the first switch and the battery pack, and the other end of the second switch is connected with the first input end of the power stage circuit. The battery of the invention keeps the voltage at the two ends of the load stable when being charged and discharged.
Description
Technical Field
The invention relates to the technical field of power electronics, in particular to a battery charging and discharging circuit.
Background
In practical application, when a load such as a Bluetooth sound box is used, two lithium batteries in the load need to be charged, and then the load is powered by discharging the internal batteries. In the prior art, 2 lithium batteries are directly charged by using an input voltage of USB access 5V, and a load is directly supplied by using the lithium batteries.
As shown in fig. 1, the load takes a bluetooth speaker as an example, and the switching tubes M1 and M2 operate in a high-frequency switching state. The USB is used for introducing 5V input voltage, two lithium batteries V1 and V2 are charged through a Boost circuit, and then the battery pack consisting of V1 and V2 is used for charging the Bluetooth sound box.
However, when the battery pack consisting of V1 and V2 is used for supplying power to the sound box, the voltage at the two ends of the sound box is continuously reduced in the use process, and the sound emitted by the sound box is changed along with the change of the voltage of the battery, so that the sound emitted by the sound box is also continuously reduced.
Disclosure of Invention
In view of the above, the present invention provides a battery charging and discharging circuit for solving the problem that the voltage at both ends of the load is continuously changed when the battery is discharged in the prior art.
The invention provides a battery charging and discharging circuit which comprises a power level circuit, a first switch and a second switch, wherein a first input end of the power level circuit is connected with a high potential end of input voltage, a second input end of the power level circuit is connected with a low potential end of the input voltage, a first output end of the power level circuit is connected with one end of the first switch, the other end of the first switch is connected with a positive electrode of a battery pack, a negative electrode of the battery pack is connected with a second output end of the power level circuit, a load is connected with an output end of the power level circuit, one end of the second switch is connected with a common end of the first switch and the battery pack, and the other end of the second switch is connected with the first input end of the power level circuit.
Optionally, the first input end of the power stage circuit is an input high potential end of the power stage circuit, the second input end of the power stage circuit is an input low potential end of the power stage circuit, the first output end of the power stage circuit is an output high potential end of the power stage circuit, the second output end of the power stage circuit is an output low potential end of the power stage circuit, and the second input end and the second output end of the power stage circuit are the same end.
Optionally, the battery charging and discharging circuit includes a third switch, one end of the third switch is connected to the high potential end of the input voltage, and the other end of the third switch is connected to the first input end of the power stage circuit.
Optionally, when the battery is charged, the load is opened, the first switch and the third switch are both closed, and when the second switch is opened, the input voltage charges the battery pack through the power stage circuit;
when the first switch and the third switch are both opened and the second switch is closed, the battery pack discharges the load through the power stage circuit.
Optionally, the first switch, the second switch and the third switch are all switching tubes.
The utility model provides a battery charge-discharge circuit, includes power level circuit, first switch tube, second switch and third switch, the first input of power level circuit is through the high potential end of third switch connection input voltage, the second input of power level circuit is connected the low potential end of input voltage, the first output of power level circuit is connected the one end of first switch tube, the anodal of group battery is connected to the other end of first switch tube, the second output of power level circuit is connected to the negative pole of group battery, the load is connected the output of power level circuit, the one end of second switch is connected first switch tube with the public end of group battery, the other end of second switch is connected the first input of power level circuit.
Optionally, when the battery is charged, the load is opened, the first switch tube is turned on, the third switch is turned on, and when the second switch is opened, the input voltage charges the battery pack through the power stage circuit;
and when the first switch tube and the third switch are opened and the second switch is closed, the battery pack discharges the load through the power stage circuit.
Alternatively, when there is an input voltage, the voltage,
the input voltage is sufficient to power the load:
the third switch is opened, the second switch is closed, the battery pack supplies power to the load through the power stage circuit,
the third switch is closed, the second switch is opened, the input voltage supplies power to the load through the power stage circuit, the redundant energy charges the battery pack through the first switch tube,
the third switch is closed, the first switch tube is opened, the input voltage supplies power to the load through the power stage circuit, and the redundant energy charges the battery pack through the second switch;
the input voltage is insufficient to power the load:
the first switch tube is opened, the second switch and the third switch are closed, the input voltage and the battery pack supply power to the load through the power stage circuit,
the first switch tube and the third switch are opened, the second switch is closed, and the battery pack supplies power to the load through the power stage circuit.
Optionally, when no input voltage is applied, the first switch tube and the third switch are opened, and when the second switch is closed, the battery pack discharges the load through the power stage circuit.
Optionally, the voltage across the load is kept stable by adjusting the duty cycle of the power stage circuit.
Optionally, the first switch or the first switching tube and the second switch are bidirectional blocking switching tubes.
According to the invention, the battery and the power supply power to the load through the power stage circuit, and the voltage at two ends of the load is kept stable by adjusting the duty ratio of the power stage circuit, so that the invention can be more suitable for occasions with relatively stable voltage requirements at two ends of the load. The invention can finish the three conditions of a power supply, a battery, the power supply and the battery to supply power to the load respectively, and the battery keeps the voltage at two ends of the load stable when being charged and discharged.
Drawings
FIG. 1 is a schematic diagram of a portion of a prior art battery charge-discharge circuit;
fig. 2 is a schematic diagram of a portion of a battery charging/discharging circuit according to an embodiment of the present invention.
Fig. 3 is a schematic diagram of a part of a battery charging/discharging circuit according to a second embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, but the present invention is not limited to these embodiments only. The invention is intended to cover any alternatives, modifications, equivalents, and variations that fall within the spirit and scope of the invention.
In the following description of preferred embodiments of the invention, specific details are set forth in order to provide a thorough understanding of the invention, and the invention will be fully understood to those skilled in the art without such details.
The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. It should be noted that the drawings are in a simplified form and are not to scale precisely, but rather are merely intended to facilitate and clearly illustrate the embodiments of the present invention.
As shown in fig. 2, a schematic diagram of a part of the structure of a battery charging and discharging circuit according to a first embodiment of the present invention is shown. The battery charging and discharging circuit comprises a first switch S1, a second switch S2, a third switch S3 and a power stage circuit. One end of the third switch S3 is connected with a high potential end of an input voltage, the other end of the third switch S3 is connected with a first input end of the power stage circuit, a second input end of the power stage circuit is connected with a low potential end of the input voltage, a first output end of the power stage circuit is connected with one end of the first switch S1, the other end of the first switch S1 is connected with a positive electrode of the battery pack, a negative electrode of the battery pack is connected with a second output end of the power stage circuit, a load is connected with an output end of the power stage circuit, one end of the second switch S2 is connected with a public end of the first switch S1 and the battery pack, and the other end of the second switch S2 is connected with the first input end of the power stage circuit.
The first input end of the power stage circuit is an input high-potential end of the power stage circuit, the second input end of the power stage circuit is an input low-potential end of the power stage circuit, the first output end of the power stage circuit is an output high-potential end of the power stage circuit, the second output end of the power stage circuit is an output low-potential end of the power stage circuit, and the second input end and the second output end of the power stage circuit are the same end.
The battery pack shown in fig. 2 is formed by connecting two batteries V1 and V2 in series, but any number and manner of battery packs are within the scope of the present invention.
In a first embodiment, the power stage circuit is a Boost circuit, and includes an energy storage inductor, a second switching tube M2 and a third switching tube M3, a drain electrode of the second switching tube is a first output end of the power stage circuit, a source electrode of the first switching tube is connected to a drain electrode of the third switching tube, a source electrode of the third switching tube is a second output end and a second input end of the power stage circuit, one end of the energy storage inductor is connected to a common end of the first switching tube and the second switch, and the other end of the energy storage inductor is used as a first output end of the power stage circuit.
Embodiment one circuit may perform two functions:
1. and (3) charging a battery: the switching tubes M2, M3 operate in a high frequency switching mode, and when the load is opened, the switches S1, S3 are closed, and S2 is opened, the circuit is a boost circuit, the input is an input voltage, the output is batteries V1 and V2 (battery pack), and the input voltage charges the batteries V1, V2.
2. Discharging the battery: the switching tubes M2, M3 operate in a high frequency switching mode, and when the switches S1, S3 are opened and S2 is closed, the circuit is a boost circuit, the voltages of the batteries V1 and V2 (battery pack) are input, and the voltages of both sides of the load are output.
As shown in fig. 3, a schematic diagram of a part of the structure of a battery charging and discharging circuit according to a first embodiment of the present invention is shown. The battery charging and discharging circuit comprises a first switch tube M1, a second switch S2, a third switch S3 and a power stage circuit. One end of the third switch S3 is connected with a high potential end of an input voltage, the other end of the third switch S3 is connected with a first input end of the power stage circuit, a second input end of the power stage circuit is connected with a low potential end of the input voltage, a first output end of the power stage circuit is connected with one end of the first switch tube M1, the other end of the first switch tube M1 is connected with a positive electrode of a battery pack, a negative electrode of the battery pack is connected with a second output end of the power stage circuit, a load is connected with an output end of the power stage circuit, one end of the second switch S2 is connected with a common end of the first switch tube M1 and the battery pack, and the other end of the second switch S2 is connected with the first input end of the power stage circuit.
The first input end of the power stage circuit is an input high-potential end of the power stage circuit, the second input end of the power stage circuit is an input low-potential end of the power stage circuit, the first output end of the power stage circuit is an output high-potential end of the power stage circuit, the second output end of the power stage circuit is an output low-potential end of the power stage circuit, and the second input end and the second output end of the power stage circuit are the same end.
The battery pack shown in fig. 3 is formed by connecting two batteries V1 and V2 in series, but any number and manner of battery packs are within the scope of the present invention.
In a second embodiment, the power stage circuit is a Boost circuit, and includes an energy storage inductor, a second switching tube M2 and a third switching tube M3, a drain electrode of the second switching tube is a first output end of the power stage circuit, a source electrode of the first switching tube is connected to a drain electrode of the third switching tube, a source electrode of the third switching tube is a second output end and a second input end of the power stage circuit, one end of the energy storage inductor is connected to a common end of the first switching tube and the second switch, and the other end of the energy storage inductor is used as a first output end of the power stage circuit.
The second embodiment can complete the charge and discharge process of the battery under the two conditions of disconnection and non-disconnection of the load, and can ensure the voltage stability of the two ends of the load in the charge and discharge process of the battery under the two conditions.
1. Load disconnection during charging
And (3) charging a battery: the switching tubes M2 and M3 work in a high-frequency switching mode, the first switching tube M1 is conducted, the third switch S3 is closed, and when the second switch S2 is opened, the input voltage charges the battery pack through the power stage circuit;
discharging the battery: the switching tubes M2 and M3 work in a high-frequency switching mode, and when the first switching tube M1 and the third switching tube S3 are opened and the second switching tube S2 is closed, the battery pack discharges the load through the power stage circuit.
2. The load is not disconnected during charging
2.1 when there is an input voltage, the switching tube M2, M3 operates in high frequency switching mode:
2.1.1 said input voltage is sufficient to power the load:
when the voltage of the battery pack is greater than the input voltage, the third switch S3 is opened, the second switch S2 is closed, and the battery pack supplies power to the load through the power stage circuit.
When the voltage of the battery pack is smaller than the input voltage, the third switch S3 is closed, the second switch S2 is opened, the input voltage supplies power to the load through the power stage circuit, and the redundant energy charges the battery pack through the first switch tube M1; or the third switch S3 is closed, the first switch tube M1 is opened, the input voltage supplies power to the load through the power stage circuit, and the redundant energy charges the battery pack through the second switch S2.
2.1.2 said input voltage is insufficient to power the load:
the first switch tube M1 is opened, the second switch S2 and the third switch S3 are closed, and the input voltage and the battery pack supply power to the load through the power stage circuit; or the first switch M1 and the third switch S3 are opened, the second switch S2 is closed, and the battery pack supplies power to the load through the power stage circuit.
2.2 when there is no input voltage, the switching tube M2, M3 operates in high frequency switching mode:
and when the first switch tube and the third switch are opened and the second switch is closed, the battery pack discharges the load through the power stage circuit.
It should be noted that, in the first embodiment and the second embodiment, whether or not the third switch S3 is present depends on whether or not the power supply is turned off during the discharging of the battery pack, if the power supply is directly turned off, the switch S3 is not required, and if the power supply is not turned off, the third switch S3 is required to turn off the power supply during the discharging of the battery pack.
In the first embodiment and the second embodiment, although the voltage of the battery packs V1 and V2 is continuously reduced during the discharging process, the voltage at both sides of the sound box can be kept constant by adjusting the duty ratio of the boost circuit (i.e. the power stage circuit) at this time, and the voltage at both sides of the sound box can not be changed along with the change of the voltage of the battery.
Many methods for adjusting the duty ratio of the power stage circuit, such as introducing an operational amplifier, sampling the voltage at the common terminal of the battery pack and the first switch S1, inputting the voltage to one terminal of the operational amplifier, setting a reference voltage at the second terminal of the operational amplifier, and connecting the output terminal of the operational amplifier to the control terminal of the main power tube (in this circuit, the switching tube M1).
It should be noted that the embodiment of the present invention only shows one embodiment of the power stage circuit, and any type of power stage circuit applied in the present invention is within the scope of the present invention.
The switch in the invention refers to a broad sense switch, and can be a switch, a switch tube, or a combination of the switch and the switch tube. The switches can be replaced by switching tubes.
In addition, the first switch S1 or the first switch tube M1 and the second switch S2 may be bidirectional blocking switch tubes, where the bidirectional blocking switch tubes are used to prevent reverse connection of the battery during charging and discharging, which is an upgrade of fig. 2. Other specific operations are the same as those of fig. 2.
Although the embodiments have been described and illustrated separately above, and with respect to a partially common technique, it will be apparent to those skilled in the art that alternate and integration may be made between embodiments, with reference to one embodiment not explicitly described, and reference may be made to another embodiment described.
The above-described embodiments do not limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the above embodiments should be included in the scope of the present invention.
Claims (10)
1. The utility model provides a battery charge-discharge circuit, includes power level circuit, first switch and second switch, its characterized in that:
the first input end of the power stage circuit is connected with a high potential end of an input voltage, the second input end of the power stage circuit is connected with a low potential end of the input voltage, the first output end of the power stage circuit is connected with one end of the first switch, the other end of the first switch is connected with the positive electrode of the battery pack, the negative electrode of the battery pack is connected with the second output end of the power stage circuit, the load is connected with the output end of the power stage circuit, one end of the second switch is connected with the common end of the first switch and the battery pack, the other end of the second switch is connected with the first input end of the power stage circuit,
the battery pack supplies power to the load through the power stage circuit by controlling the on-off of the first switch and the second switch, and the voltage at two ends of the load is kept stable by adjusting the duty ratio of the power stage circuit.
2. The battery charge-discharge circuit of claim 1, wherein the first input terminal of the power stage circuit is an input high potential terminal of the power stage circuit, the second input terminal of the power stage circuit is an input low potential terminal of the power stage circuit, the first output terminal of the power stage circuit is an output high potential terminal of the power stage circuit, the second output terminal of the power stage circuit is an output low potential terminal of the power stage circuit, and the second input terminal and the second output terminal of the power stage circuit are the same terminal.
3. The battery charge-discharge circuit according to claim 1 or 2, wherein the battery charge-discharge circuit includes a third switch, one end of which is connected to a high potential end of the input voltage, and the other end of which is connected to a first input end of the power stage circuit.
4. The battery charge and discharge circuit according to claim 3, wherein,
when the battery is charged, the load is opened, the first switch and the third switch are both closed, and when the second switch is opened, the input voltage charges the battery pack through the power stage circuit;
when the first switch and the third switch are both opened and the second switch is closed, the battery pack discharges the load through the power stage circuit.
5. The battery charge-discharge circuit of claim 3, wherein the first switch, the second switch, and the third switch are switching tubes.
6. A battery charging and discharging circuit comprises a power stage circuit, a first switch tube, a second switch and a third switch, and is characterized in that,
the first input end of the power stage circuit is connected with a high potential end of an input voltage through the third switch, the second input end of the power stage circuit is connected with a low potential end of the input voltage, the first output end of the power stage circuit is connected with one end of the first switch tube, the other end of the first switch tube is connected with the positive electrode of the battery pack, the negative electrode of the battery pack is connected with the second output end of the power stage circuit, the load is connected with the output end of the power stage circuit, one end of the second switch is connected with the common end of the first switch tube and the battery pack, the other end of the second switch is connected with the first input end of the power stage circuit,
the battery pack supplies power to the load through the power stage circuit by controlling the on-off of the first switch tube, the second switch and the third switch, and the voltage at two ends of the load is kept stable by adjusting the duty ratio of the power stage circuit.
7. The battery charge and discharge circuit of claim 6 wherein,
when the battery is charged, the load is opened, the first switch tube is turned on, the third switch is turned on, and when the second switch is opened, the input voltage charges the battery pack through the power stage circuit;
and when the first switch tube and the third switch are opened and the second switch is closed, the battery pack discharges the load through the power stage circuit.
8. The battery charge and discharge circuit of claim 6 wherein,
when the battery pack is connected with the load, the input voltage is enough to supply power to the load, and the voltage of the battery pack is larger than the input voltage, the third switch is opened, the second switch is closed, and the battery pack supplies power to the load through the power stage circuit;
when the battery pack is connected with the load, the input voltage is enough to supply power to the load, and the voltage of the battery pack is smaller than the input voltage, the third switch is closed, the second switch is opened, the input voltage supplies power to the load through the power stage circuit, and the redundant energy charges the battery pack through the first switch tube; or when the battery pack is connected with the load, the input voltage is enough to supply power to the load, and the voltage of the battery pack is smaller than the input voltage, the third switch is closed, the first switch tube is opened, the input voltage supplies power to the load through the power stage circuit, and the redundant energy charges the battery pack through the second switch;
when the battery pack is connected with the load and the input voltage is insufficient to supply power to the load, the first switch tube is opened, the second switch and the third switch are closed, and the input voltage and the battery pack supply power to the load through the power stage circuit; or when the battery pack is connected with the load and the input voltage is insufficient to supply power to the load, the first switch tube and the third switch are opened, the second switch is closed, and the battery pack supplies power to the load through the power stage circuit.
9. The battery charge-discharge circuit of claim 6, wherein the first switch tube and the third switch are open when no input voltage is present, and wherein the battery pack discharges the load through the power stage circuit when the second switch is closed.
10. The battery charge-discharge circuit of claim 1 or 6, wherein the first switch or the first switch tube and the second switch are bidirectional blocking switch tubes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711186630.2A CN107863802B (en) | 2017-11-23 | 2017-11-23 | Battery charging and discharging circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711186630.2A CN107863802B (en) | 2017-11-23 | 2017-11-23 | Battery charging and discharging circuit |
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| CN107863802A CN107863802A (en) | 2018-03-30 |
| CN107863802B true CN107863802B (en) | 2024-02-20 |
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| US5206538A (en) * | 1991-04-03 | 1993-04-27 | At&T Bell Laboratories | Automatic system battery reconnect circuit responsive to insertion of new battery replacement |
| CN103825329A (en) * | 2014-03-03 | 2014-05-28 | 矽力杰半导体技术(杭州)有限公司 | Bidirectional power-switching circuit |
| CN104065119A (en) * | 2014-06-04 | 2014-09-24 | 南京矽力杰半导体技术有限公司 | Battery power supply circuit and method |
| CN104300605A (en) * | 2014-10-08 | 2015-01-21 | 青岛歌尔声学科技有限公司 | Power circuit and control method thereof |
| CN105305382A (en) * | 2015-11-23 | 2016-02-03 | 青岛歌尔声学科技有限公司 | Charge and discharge protective circuit for battery |
| CN106464006A (en) * | 2014-06-26 | 2017-02-22 | Fdk株式会社 | Uninterruptible power-supply system |
| CN107147350A (en) * | 2017-07-07 | 2017-09-08 | 天津理工大学 | A kind of hybrid energy-storing control system and its method of work |
| CN207603249U (en) * | 2017-11-23 | 2018-07-10 | 杰华特微电子（杭州）有限公司 | A kind of battery charge-discharge circuit |
-
2017
- 2017-11-23 CN CN201711186630.2A patent/CN107863802B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5206538A (en) * | 1991-04-03 | 1993-04-27 | At&T Bell Laboratories | Automatic system battery reconnect circuit responsive to insertion of new battery replacement |
| CN103825329A (en) * | 2014-03-03 | 2014-05-28 | 矽力杰半导体技术(杭州)有限公司 | Bidirectional power-switching circuit |
| CN104065119A (en) * | 2014-06-04 | 2014-09-24 | 南京矽力杰半导体技术有限公司 | Battery power supply circuit and method |
| CN106464006A (en) * | 2014-06-26 | 2017-02-22 | Fdk株式会社 | Uninterruptible power-supply system |
| CN104300605A (en) * | 2014-10-08 | 2015-01-21 | 青岛歌尔声学科技有限公司 | Power circuit and control method thereof |
| CN105305382A (en) * | 2015-11-23 | 2016-02-03 | 青岛歌尔声学科技有限公司 | Charge and discharge protective circuit for battery |
| CN107147350A (en) * | 2017-07-07 | 2017-09-08 | 天津理工大学 | A kind of hybrid energy-storing control system and its method of work |
| CN207603249U (en) * | 2017-11-23 | 2018-07-10 | 杰华特微电子（杭州）有限公司 | A kind of battery charge-discharge circuit |
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| CN107863802A (en) | 2018-03-30 |
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Address after: Room 901-23, 9 / F, west 4 building, Xigang development center, 298 Zhenhua Road, Sandun Town, Xihu District, Hangzhou City, Zhejiang Province, 310030 Applicant after: Jiehuate Microelectronics Co.,Ltd. Address before: Room 424, building 1, 1500 Wenyi West Road, Cangqian street, Yuhang District, Hangzhou City, Zhejiang Province Applicant before: JOULWATT TECHNOLOGY Inc.,Ltd. |
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