CN112994181B - Circuit structure suitable for parallel charging and serial use of batteries - Google Patents
Circuit structure suitable for parallel charging and serial use of batteries Download PDFInfo
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- CN112994181B CN112994181B CN202110422252.3A CN202110422252A CN112994181B CN 112994181 B CN112994181 B CN 112994181B CN 202110422252 A CN202110422252 A CN 202110422252A CN 112994181 B CN112994181 B CN 112994181B
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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
- H02J7/0024—Parallel/serial switching of connection of batteries to charge or load circuit
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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
- H02J7/0014—Circuits for equalisation of charge between batteries
- H02J7/0016—Circuits for equalisation of charge between batteries using shunting, discharge or bypass circuits
Abstract
The invention provides a circuit structure suitable for parallel charging and series use of batteries, which comprises: the device comprises a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a charging control module, a substrate selection module and a time sequence control module. The invention can effectively solve the problem of the balance of the two charging capacities caused by the charging of the traditional series batteries, ensure that the two batteries can be effectively fully charged and greatly improve the service life of the battery pack. The invention can effectively solve the problem that the traditional serial charging has limitation on the use of the USB system in low-voltage occasions especially in the prior art because the voltage of the input power supply of the whole system is high due to the high voltage of the battery after serial connection.
Description
Technical Field
The invention belongs to the field of battery circuit design, and particularly relates to a circuit structure suitable for parallel charging and serial use of batteries.
Background
A lithium battery is a battery using a nonaqueous electrolyte solution and lithium metal or a lithium alloy as a negative electrode material, and therefore such a battery is also called a lithium metal battery. Unlike other batteries, lithium batteries have the characteristics of high charge density, long service life, high unit cost and the like. Small lithium batteries are commonly used in small portable electronic devices such as PDAs, watches, video cameras, digital cameras, thermometers, calculators, computer BIOS, communication devices, and remote car locks. The characteristics of high current, high energy density, and longer-lasting high voltage than alkaline batteries make lithium batteries a particularly attractive choice.
The battery charging management of two lithium batteries currently used in the market adopts a series charging scheme, which has the following two disadvantages:
first, in the battery series charging scheme, a charger higher than the voltage of the series battery pack is required, and the voltage ratio of the input power system is required to be high, which limits the application of many standard 5V charging power systems on the market.
Secondly, because the batteries are charged in series, the charging and the ending of the charging of the two batteries connected in series are synchronously carried out, and because of the difference of the batteries, the charging capacities of the two batteries cannot be completely matched, so that when the battery with large capacity in the two batteries is fully charged in the charging process, the other battery with small capacity is repeatedly charged, the service life of the battery is influenced, and the problem of serious insufficient charging balance exists.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, an object of the present invention is to provide a circuit structure suitable for parallel charging and serial use of batteries, so as to solve the problems in the prior art that the serial charging of batteries results in a higher power supply voltage and limits the use of the battery, and the serial charging of batteries results in insufficient charge balance.
To achieve the above and other related objects, the present invention provides a circuit structure suitable for parallel charging and series connection of batteries, the circuit structure comprising: the circuit comprises a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a charging control module, a substrate selection module and a time sequence control module, wherein a first pole of the first MOS tube is connected with a power supply, a second pole of the first MOS tube is connected with a positive terminal of a first battery, a grid of the first MOS tube is connected with the charging control module, and a substrate is connected with the substrate selection module; the first pole of the second MOS tube is connected with a power supply, the second pole of the second MOS tube is connected with the positive end of the second battery and is connected with the negative end of the first battery, the grid of the second MOS tube is connected with the charging control module, and the substrate of the second MOS tube is connected with the substrate selection module; the first pole of the third MOS tube is grounded, the second pole of the third MOS tube is connected with the negative end of the first battery, the grid of the third MOS tube is connected with the time sequence control module, the first pole of the fourth MOS tube is connected with the negative end of the second battery, the second pole of the fourth MOS tube is connected with the second pole of the fifth MOS tube, the grid of the fourth MOS tube is connected with the time sequence control module, the first pole of the fifth MOS tube is grounded, and the grid of the fifth MOS tube is connected with the time sequence control module.
Optionally, the first MOS transistor and the second MOS transistor are PMOS transistors, and the third MOS transistor, the fourth MOS transistor and the fifth MOS transistor are NMOS transistors.
Optionally, the charging control module is configured to control turn-on and turn-off of the first MOS transistor and the second MOS transistor to control turn-on and turn-off of charging of the first battery and the second battery, and the timing control module is configured to control turn-on and turn-off of the third MOS transistor, the fourth MOS transistor, and the fifth MOS transistor to control grounding of negative terminals of the first battery and the second battery.
Optionally, the substrate selection module is configured to select a higher voltage from the voltage of the power supply and the positive terminal voltage of the first battery as the substrate voltage of the first MOS transistor, so that the substrate of the first MOS transistor operates at the highest voltage to reduce the leakage, and meanwhile, the substrate selection module is configured to select a higher voltage from the voltage of the power supply and the positive terminal voltage of the second battery as the substrate voltage of the second MOS transistor, so that the substrate of the second MOS transistor operates at the highest voltage to reduce the leakage.
Optionally, the third MOS transistor is a negative terminal control transistor of a first battery, when the first battery is charged, the charging control module controls the first MOS transistor to be turned on, the timing control module controls the third MOS transistor to be turned on, so that the negative terminal of the first battery is grounded, when the first battery is stopped being charged, the charging control module controls the first MOS transistor to be turned off, and the timing control module controls the third MOS transistor to be turned off; the fourth MOS tube and the fifth MOS tube jointly form a negative end control tube of the second battery, when the second battery is charged, the charging control module controls the second MOS tube to be conducted, the timing sequence control module controls the fourth MOS tube and the fifth MOS tube to be simultaneously opened so that the negative end of the second battery is grounded, when the second battery stops charging, the charging control module controls the second MOS tube to be closed, and the timing sequence control module controls the fourth MOS tube and the fifth MOS tube to be closed.
Optionally, the substrate and the source of the fourth MOS transistor are connected to the negative terminal of the second battery, the drain of the fourth MOS transistor is connected to the drain of the fifth MOS transistor, and the substrate and the source of the fifth MOS transistor are grounded, so as to avoid the risk of leakage caused by a negative voltage lower than the ground voltage occurring at the negative terminal of the second battery due to capacitance.
Optionally, the charging of the first battery and the second battery is realized in a time-sharing manner, when the first battery is in a charging state, the second battery is in a charging stop state, and when the second battery is in the charging state, the first battery is in the charging stop state.
Optionally, after one of the first battery and the second battery is charged, the charging control module controls the corresponding first MOS transistor or the corresponding second MOS transistor to be turned off; at the moment, the time-sharing control of the circuit structure cannot be stopped, the charged battery still has two states of a charging period and a charging stopping period, and the circuit structure stops charging after the first battery and the second battery are charged; and the circuit structure detects the state of the first battery or the second battery, and when the battery voltage of one battery or both batteries drops to a certain voltage value, the circuit structure restarts charging.
Optionally, the circuit structure includes a first lead-out terminal, a second lead-out terminal, and a third lead-out terminal, the first lead-out terminal is connected to the positive terminal of the first battery, the second lead-out terminal is connected to both the negative terminal of the first battery and the positive terminal of the second battery, and the third lead-out terminal is connected to the negative terminal of the second battery.
Optionally, the power supply voltage of the power supply is 5V.
As described above, the circuit structure of the present invention suitable for parallel charging and serial use of batteries has the following advantages:
the invention can solve two defects caused by series charging well, the system can use a low-voltage 5V power supply to supply power, the compatibility problem of standard 5V charging voltage in the current market is solved well, a time-sharing scheme is adopted to charge two batteries respectively when parallel charging is used, the charging of the two batteries is parallel controlled and does not affect each other, the system can automatically stop the charging of one battery after the battery is fully charged, but does not affect the charging of the other battery, and the charging end is displayed only when the two batteries are fully charged;
the invention can effectively solve the problem of the balance of the two charging capacities caused by the charging of the traditional series batteries, ensure that the two batteries can be effectively fully charged and greatly improve the service life of the battery pack.
The invention can effectively solve the problem that the traditional serial charging has limitation on the use of the USB system in low-voltage occasions especially in the prior art because the voltage of the input power supply of the whole system is high due to the high voltage of the battery after serial connection.
Drawings
Fig. 1 is a schematic diagram of a circuit structure suitable for parallel charging and series connection of batteries according to the present invention.
Element number description: 101 a first MOS transistor, 102 a second MOS transistor, 103 a third MOS transistor, 104 a fourth MOS transistor, 105 a fifth MOS transistor, 106 a first battery, 107 a second battery, 108 a charging control module, 109 a substrate selection module and 110 a time sequence control module.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
As in the detailed description of the embodiments of the present invention, the cross-sectional views illustrating the device structures are not partially enlarged in general scale for convenience of illustration, and the schematic views are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in the actual fabrication.
For convenience in description, spatial relational terms such as "below," "beneath," "below," "under," "over," "upper," and the like may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that these terms of spatial relationship are intended to encompass other orientations of the device in use or operation in addition to the orientation depicted in the figures. Further, when a layer is referred to as being "between" two layers, it can be the only layer between the two layers, or one or more intervening layers may also be present.
In the context of this application, a structure described as having a first feature "on" a second feature may include embodiments in which the first and second features are formed in direct contact, and may also include embodiments in which additional features are formed in between the first and second features, such that the first and second features may not be in direct contact.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the drawings only show the components related to the present invention rather than being drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of each component in actual implementation may be changed arbitrarily, and the layout of the components may be more complicated.
As shown in fig. 1, the present embodiment provides a circuit structure suitable for parallel charging and serial connection of batteries, the circuit structure includes: the circuit comprises a first MOS tube 101, a second MOS tube 102, a third MOS tube 103, a fourth MOS tube 104, a fifth MOS tube 105, a charging control module 108, a substrate selection module 109 and a time sequence control module 110, wherein a first pole of the first MOS tube 101 is connected with a power supply, a second pole of the first MOS tube is connected with a positive terminal of a first battery 106, a grid of the first MOS tube is connected with the charging control module 108, and a substrate is connected with the substrate selection module 109; a first pole of the second MOS transistor 102 is connected to a power supply, a second pole of the second MOS transistor is connected to a positive terminal of the second battery 107 and to a negative terminal of the first battery 106, a gate of the second MOS transistor is connected to the charging control module 108, and a substrate of the second MOS transistor is connected to the substrate selection module 109; the first pole of the third MOS 103 is grounded, the second pole is connected to the negative terminal of the first battery 106, the gate is connected to the timing control module 110, the first pole of the fourth MOS 104 is connected to the negative terminal of the second battery 107, the second pole is connected to the second pole of the fifth MOS 105, the gate is connected to the timing control module 110, the first pole of the fifth MOS 105 is grounded, and the gate is connected to the timing control module 110. The circuit structure comprises a first lead-out terminal BATU, a second lead-out terminal BATM and a third lead-out terminal BATD, wherein the first lead-out terminal BATU is connected with the positive terminal of the first battery 106, the second lead-out terminal BATM is simultaneously connected with the negative terminal of the first battery 106 and the positive terminal of the second battery 107, and the third lead-out terminal BATD is connected with the negative terminal of the second battery 107.
As an example, the first battery 106 and the second battery 107 are lithium batteries.
In this embodiment, the first MOS transistor 101 and the second MOS transistor 102 are PMOS transistors, and the third MOS transistor 103, the fourth MOS transistor 104 and the fifth MOS transistor 105 are NMOS transistors. In this embodiment, the first MOS transistor 101 and the second MOS transistor 102 are selected as PMOS transistors, which can improve the current intensity required for charging the battery, and on the other hand, can greatly reduce the leakage of the PMOS transistors by controlling the substrate voltage of the PMOS transistors when the battery stops charging. Because the negative end of the battery does not need to be driven by a large current, the third MOS transistor 103, the fourth MOS transistor 104 and the fifth MOS transistor 105 in this embodiment are selected as NMOS transistors, which can save the circuit area and improve the switching speed. Of course, the conductivity types of the first MOS transistor 101, the second MOS transistor 102, the third MOS transistor 103, the fourth MOS transistor 104 and the fifth MOS transistor 105 may be selectively adjusted according to the actual requirements of the circuit structure, and are not limited to the examples listed herein.
As shown in fig. 1, the charging control module 108 is configured to control the conduction and the disconnection of the first MOS transistor 101 and the second MOS transistor 102 to control the charging on and the charging off of the first battery 106 and the second battery 107, and the timing control module 110 is configured to control the conduction and the disconnection of the third MOS transistor 103, the fourth MOS transistor 104 and the fifth MOS transistor 105 to control the negative terminals of the first battery 106 and the second battery 107 to be grounded. The substrate selection module 109 is configured to select a higher voltage from the voltage of the power supply and the positive terminal voltage of the first battery 106 as the substrate voltage of the first MOS transistor 101, so that the substrate of the first MOS transistor 101 operates at the highest voltage to reduce leakage, and meanwhile, the substrate selection module 109 is configured to select a higher voltage from the voltage of the power supply and the positive terminal voltage of the second battery 107 as the substrate voltage of the second MOS transistor 102, so that the substrate of the second MOS transistor 102 operates at the highest voltage to reduce leakage.
As shown in fig. 1, the third MOS 103 is a negative terminal control transistor of the first battery 106, when the first battery 106 is charged, the charging control module 108 controls the first MOS 101 to be turned on, the timing control module 110 controls the third MOS 103 to be turned on, so that the negative terminal of the first battery 106 is grounded, when the first battery 106 is stopped being charged, the charging control module 108 controls the first MOS 101 to be turned off, and the timing control module 110 controls the third MOS 103 to be turned off; the fourth MOS 104 and the fifth MOS 105 jointly form a negative terminal control transistor of the second battery 107, when the second battery 107 is charged, the charging control module 108 controls the second MOS 102 to be turned on, the timing control module 110 controls the fourth MOS 104 and the fifth MOS 105 to be turned on simultaneously so as to ground the negative terminal of the second battery 107, when the second battery 107 stops being charged, the charging control module 108 controls the second MOS 102 to be turned off, and the timing control module 110 controls the fourth MOS 104 and the fifth MOS 105 to be turned off, wherein at this time, low levels output to the fourth MOS 104 and the fifth MOS 105 by the timing control module 110 are respectively a negative terminal voltage BATD and a ground voltage GND of the second battery 107.
In this embodiment, the substrate and the source of the fourth MOS transistor 104 are connected to the negative terminal of the second battery 107, the drain of the fourth MOS transistor 104 is connected to the drain of the fifth MOS transistor 105, and the substrate and the source of the fifth MOS transistor 105 are grounded, so as to avoid the risk of leakage due to a negative voltage lower than the ground voltage occurring at the negative terminal of the second battery 107 due to capacitance, and improve the reliability of the circuit structure.
In this embodiment, the charging of the first battery 106 and the second battery 107 is realized in a time-sharing manner, when the first battery 106 is in a charging state, the second battery 107 is in a charging stop state, and when the second battery 107 is in the charging state, the first battery 106 is in the charging stop state. Specifically, after one of the first battery 106 or the second battery 107 is charged, the charging control module 108 controls the corresponding first MOS transistor 101 or the second MOS transistor 102 to be turned off; at this time, the time-sharing control of the circuit structure is not stopped, and the battery after being charged still has two states of a charging period and a charging period stopping state, but the difference is that the charging current is 0 because the battery is fully charged, and the circuit structure stops charging after the charging of the first battery 106 and the charging of the second battery 107 are completed; the circuit arrangement subsequently detects the state of the first battery 106 or the second battery 107, and when the battery voltage drops to a certain voltage value in the presence of one or both batteries, the circuit arrangement restarts the charging.
As shown in fig. 1, the circuit structure of this embodiment can implement parallel charging of two lithium batteries, so as to effectively reduce the charging voltage of the batteries, in this embodiment, the power supply voltage of the power supply is 5V, and the invention can use a low-voltage 5V power supply to supply power, thereby well solving the compatibility problem of the standard 5V charging voltage in the existing market.
As described above, the circuit structure of the present invention suitable for parallel charging and serial use of batteries has the following advantages:
the invention can solve two defects caused by series charging well, the system can use a low-voltage 5V power supply to supply power, the compatibility problem of standard 5V charging voltage in the current market is solved well, a time-sharing scheme is adopted to charge two batteries respectively when parallel charging is used, the charging of the two batteries is parallel controlled and does not affect each other, the system can automatically stop the charging of one battery after the battery is fully charged, but does not affect the charging of the other battery, and the charging end is displayed only when the two batteries are fully charged;
the invention can effectively solve the problem of the balance of the two charging capacities caused by the charging of the traditional series batteries, ensure that the two batteries can be effectively fully charged and greatly improve the service life of the battery pack.
The invention can effectively solve the problem that the traditional serial charging has limitation on the use of the USB system in low-voltage occasions especially in the prior art because the voltage of the input power supply of the whole system is high due to the high voltage of the battery after serial connection.
Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A circuit arrangement suitable for parallel charging and series use of batteries, said circuit arrangement comprising: the circuit comprises a first MOS tube, a second MOS tube, a third MOS tube, a fourth MOS tube, a fifth MOS tube, a charging control module, a substrate selection module and a time sequence control module, wherein a first pole of the first MOS tube is connected with a power supply, a second pole of the first MOS tube is connected with a positive terminal of a first battery, a grid of the first MOS tube is connected with the charging control module, and a substrate is connected with the substrate selection module; the first pole of the second MOS tube is connected with a power supply, the second pole of the second MOS tube is connected with the positive end of the second battery and is connected with the negative end of the first battery, the grid of the second MOS tube is connected with the charging control module, and the substrate of the second MOS tube is connected with the substrate selection module; the first pole of the third MOS tube is grounded, the second pole of the third MOS tube is connected with the negative end of the first battery, the grid of the third MOS tube is connected with the time sequence control module, the first pole of the fourth MOS tube is connected with the negative end of the second battery, the second pole of the fourth MOS tube is connected with the second pole of the fifth MOS tube, the grid of the fifth MOS tube is connected with the time sequence control module, the first pole of the fifth MOS tube is grounded, the grid of the fifth MOS tube is connected with the time sequence control module, the circuit structure comprises a first leading-out end, a second leading-out end and a third leading-out end, the first leading-out end is connected with the positive end of the first battery, the second leading-out end is simultaneously connected with the negative end of the first battery and the positive end of the second battery, the third leading-out end is connected with the negative end of the second battery, the first MOS tube and the second MOS tube are PMOS tubes, the third MOS tube, the fourth MOS tube and the fifth MOS tube are NMOS tubes, and the third MOS tube is the negative end control tube of the first battery, when the first battery is charged, the charging control module controls the first MOS tube to be conducted, the timing sequence control module controls the third MOS tube to be started so that the negative end of the first battery is grounded, when the first battery is stopped to be charged, the charging control module controls the first MOS tube to be closed, and the timing sequence control module controls the third MOS tube to be closed; the fourth MOS tube and the fifth MOS tube jointly form a negative end control tube of the second battery, when the second battery is charged, the charging control module controls the second MOS tube to be conducted, the time sequence control module controls the fourth MOS tube and the fifth MOS tube to be simultaneously opened so that the negative end of the second battery is grounded, when the second battery is stopped to be charged, the charging control module controls the second MOS tube to be closed, the time sequence control module controls the fourth MOS tube and the fifth MOS tube to be closed, the substrate and the source electrode of the fourth MOS tube are connected with the negative end of the second battery, the drain end of the fourth MOS tube is connected with the drain end of the fifth MOS tube, and the substrate and the source electrode of the fifth MOS tube are grounded so as to avoid the risk that the negative voltage lower than the ground voltage causes electric leakage due to capacitance at the negative end of the second battery.
2. The circuit structure of claim 1, wherein: the charging control module is used for controlling the conduction and the disconnection of the first MOS tube and the second MOS tube so as to control the charging of the first battery and the second battery to be started and closed, and the time sequence control module is used for controlling the conduction and the disconnection of the third MOS tube, the fourth MOS tube and the fifth MOS tube so as to control the negative ends of the first battery and the second battery to be grounded.
3. The circuit structure of claim 1, wherein: the substrate selection module is used for selecting a higher voltage from the voltage of the power supply and the positive terminal voltage of the first battery as the substrate voltage of the first MOS transistor so as to enable the substrate of the first MOS transistor to work at the highest voltage and reduce electric leakage, and meanwhile, the substrate selection module is used for selecting a higher voltage from the voltage of the power supply and the positive terminal voltage of the second battery as the substrate voltage of the second MOS transistor so as to enable the substrate of the second MOS transistor to work at the highest voltage and reduce electric leakage.
4. The circuit structure of claim 1, wherein: the charging of the first battery and the second battery is realized in a time-sharing mode, when the first battery is in a charging state, the second battery is in a charging stopping state, and when the second battery is in the charging state, the first battery is in the charging stopping state.
5. The circuit structure of claim 1, wherein: after one of the first battery or the second battery is charged, the charging control module controls the corresponding first MOS transistor or the second MOS transistor to be closed; at the moment, the time-sharing control of the circuit structure cannot be stopped, the charged battery still has two states of a charging period and a charging stopping period, and the circuit structure stops charging after the first battery and the second battery are charged; and the circuit structure detects the state of the first battery or the second battery, and when the battery voltage of one battery or both batteries drops to a certain voltage value, the circuit structure restarts charging.
6. The circuit structure of claim 1, wherein: the power supply voltage of the power supply is 5V.
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| CN202110422252.3A CN112994181B (en) | 2021-04-20 | 2021-04-20 | Circuit structure suitable for parallel charging and serial use of batteries |
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| CN202110422252.3A CN112994181B (en) | 2021-04-20 | 2021-04-20 | Circuit structure suitable for parallel charging and serial use of batteries |
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| CN112994181B true CN112994181B (en) | 2021-09-17 |
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| CN101771340A (en) * | 2008-12-31 | 2010-07-07 | 中芯国际集成电路制造(上海)有限公司 | Charge pump |
| CN102683764A (en) * | 2012-05-17 | 2012-09-19 | 陈春飞 | Paralleling charge method and paralleling device of battery unit |
| CN105576777A (en) * | 2016-03-09 | 2016-05-11 | 山东汉旗科技有限公司 | Battery protection system |
| CN105679758A (en) * | 2016-03-25 | 2016-06-15 | 南京微盟电子有限公司 | P-type metal oxide semiconductor field effect transistor capable of preventing current backflow |
| CN110224455A (en) * | 2019-04-08 | 2019-09-10 | 东莞新能德科技有限公司 | Series-parallel switching device and the battery pack comprising series-parallel switching device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10770908B2 (en) * | 2017-10-29 | 2020-09-08 | Rivian Ip Holdings, Llc | Configurable battery pack for series and parallel charging using switching |
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2021
- 2021-04-20 CN CN202110422252.3A patent/CN112994181B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101771340A (en) * | 2008-12-31 | 2010-07-07 | 中芯国际集成电路制造(上海)有限公司 | Charge pump |
| CN102683764A (en) * | 2012-05-17 | 2012-09-19 | 陈春飞 | Paralleling charge method and paralleling device of battery unit |
| CN105576777A (en) * | 2016-03-09 | 2016-05-11 | 山东汉旗科技有限公司 | Battery protection system |
| CN105679758A (en) * | 2016-03-25 | 2016-06-15 | 南京微盟电子有限公司 | P-type metal oxide semiconductor field effect transistor capable of preventing current backflow |
| CN110224455A (en) * | 2019-04-08 | 2019-09-10 | 东莞新能德科技有限公司 | Series-parallel switching device and the battery pack comprising series-parallel switching device |
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| CN112994181A (en) | 2021-06-18 |
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