CN112994193B - Charging protection circuit module and related product - Google Patents
Charging protection circuit module and related product Download PDFInfo
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- CN112994193B CN112994193B CN202110487810.4A CN202110487810A CN112994193B CN 112994193 B CN112994193 B CN 112994193B CN 202110487810 A CN202110487810 A CN 202110487810A CN 112994193 B CN112994193 B CN 112994193B
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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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The application provides a charging protection circuit module and a related product, which are applied to a charging system, wherein the charging system comprises a charging management unit, a plurality of charging units, a switch circuit unit, a power supply unit, a positive electrode output port and a negative electrode output port, each charging unit in the plurality of charging units comprises the charging protection circuit module, and the charging protection circuit module comprises a diode submodule; the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to an adjusting instruction of the charging management unit so as to prevent each charging unit from being reversely irrigated by the output of other charging units, and the adjusting instruction is generated by the charging management unit according to the working mode. Therefore, the requirement of parallel application of a plurality of charging unit outputs can be met, and the problem of reliability risk of negative pressure reverse irrigation of a plurality of charging unit outputs in series can be solved.
Description
Technical Field
The application relates to the field of electronics, in particular to a charging protection circuit module and a related product.
Background
With the wider application range of the modular power supply, the required output current is larger and larger, and the required output voltage is higher and higher. When a single power module cannot meet the required large-current output, a plurality of outputs need to be connected in parallel for use, and when a single output cannot meet the high-voltage output, a plurality of outputs also need to be connected in series for use. However, when a plurality of outputs are connected in parallel, if the output voltage of one output is too low or an internal short-circuit fault occurs, the other outputs can cause output reverse-flow to the current output, and the circuit safety is affected. When a plurality of outputs are connected in series, if the current output and other outputs cannot be started or shut down at the same time, the other outputs can also cause output reverse irrigation to the current output, and finally circuit safety is affected.
Disclosure of Invention
Based on the deficiency of prior art, this application provides a protection circuit module and relevant product charges to satisfy simultaneously that a plurality of outputs can realize improving the security of circuit on the basis of series connection or parallel mode switch.
In a first aspect, an embodiment of the present application provides a charging protection circuit module, which is applied to a charging system, where the charging system includes a charging management unit, a plurality of charging units, a switch circuit unit, a power supply unit, a positive output port, and a negative output port, each of the plurality of charging units includes the charging protection circuit module, and the charging protection circuit module includes a diode submodule;
the charging management unit is respectively connected with the plurality of charging units and the switch circuit unit, the plurality of charging units are respectively connected with the power supply unit and are respectively connected with the anode output port and the cathode output port through the switch circuit unit, and the working modes of the switch circuit unit comprise a series mode and a parallel mode;
the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to an adjusting instruction of the charging management unit so as to prevent each charging unit from being reversely irrigated by the output of other charging units, and the adjusting instruction is generated by the charging management unit according to the working mode.
In a second aspect, an embodiment of the present application provides a charging unit, which is applied to a charging system, where the charging system includes a charging management unit, the charging unit, a switching circuit unit, a power supply unit, a positive output port, and a negative output port, and the charging unit includes:
the processing module is connected with the power supply unit and used for receiving and storing the charging current from the power supply unit;
a charging protection circuit module connected to the processing module and connected to the positive output port and the negative output port through the switch circuit unit, for implementing the functions as described in the first aspect above.
In a third aspect, an embodiment of the present application provides a charging device, which is applied to a charging system, where the charging system includes the charging device, a charging management unit, a switching circuit unit, and a power supply unit, and the charging device includes:
a plurality of charging units respectively connected to the power supply unit and the charging management unit for realizing the functions as described in the second aspect above;
and the positive output port and the negative output port are connected with the plurality of charging units through the switch circuit unit and are connected with a load for supplying power to the load.
In a fourth aspect, embodiments of the present application provide a charging apparatus, which may implement the functions described in any of the first, second, third, or fourth aspects above.
It can be seen that the charging protection circuit module provided by the present application is applied to a charging system, where the charging system includes a charging management unit, a plurality of charging units, a switch circuit unit, a power supply unit, a positive output port, and a negative output port, where each of the plurality of charging units includes the charging protection circuit module, and the charging protection circuit module includes a diode submodule; the charging management unit is respectively connected with the plurality of charging units and the switch circuit unit, the plurality of charging units are respectively connected with the power supply unit and are respectively connected with the anode output port and the cathode output port through the switch circuit unit, and the working modes of the switch circuit unit comprise a series mode and a parallel mode; the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to an adjusting instruction of the charging management unit so as to prevent each charging unit from being reversely irrigated by the output of other charging units, and the adjusting instruction is generated by the charging management unit according to the working mode. Therefore, parallel output or serial output of the plurality of charging units can be realized, the current charging unit cannot be reversely irrigated by the output of other charging units even if the charging units are in parallel output or serial output, and the safety and the reliability of the circuit can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a parallel output of a plurality of power modules;
FIG. 2 is a schematic diagram of a plurality of power modules connected in series for output;
fig. 3 is a schematic diagram of a charging system according to an embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a charging unit according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a processing module according to an embodiment of the present disclosure;
fig. 6 is a schematic structural diagram of a charging protection circuit module according to an embodiment of the present disclosure;
fig. 7 is a schematic circuit diagram of a charging protection circuit module according to an embodiment of the present disclosure;
fig. 8 is a schematic circuit diagram of another charging protection circuit module according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of a charging device according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," and the like in the description and claims of the present application and in the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
Since the application of the modular power supplies is becoming widespread, the modular power supplies are connected in series in order to obtain a large output voltage, and are connected in parallel in order to obtain a large output current. And transmits data through the CAN bus connection.
When a plurality of power modules are connected in parallel, if one of the power modules has low output voltage or has a short-circuit fault inside, external voltage output by other power modules can reversely charge a capacitor in the power module or the power module has a reverse-charging fault. However, the solution to this problem may be to design a diode at the output end of each power module, please refer to fig. 1, where fig. 1 is a schematic diagram of parallel output of a plurality of power modules. As shown, the anode of the diode Dr and the anode of the capacitor CoutTerminal connection, cathode and anode output terminal V of the diode Drout+ connected, positive output terminal and negative output terminal VoutThe load RL is connected, this diode Dr then being a non-return diode. Thus, when the output voltage of the module is low, the external voltage is output to prevent the electrolytic capacitor inside the module from being reversely charged; meanwhile, when a single module has an output internal short circuit fault, the non-return diode plays a role in completely separating the fault module from other parallel modules, and safety risks of the output reverse-filling fault modules of the other parallel modules are avoided.
However, if the power modules are used in series, as shown in fig. 2, fig. 2 is a schematic diagram illustrating the series output of a plurality of power modules. When multiple power modules are connected in series, complete synchronization cannot be guaranteed due to the timing sequence established by the startup voltage between the modules. Therefore, reverse negative voltage is applied to the output side of the power module with a slow start-up time sequence in the start-up process, and negative voltage breakdown damage of an output internal capacitor can be caused. Similarly, when a single power supply module in the series system is in protection shutdown, the protection shutdown of other normal power supply modules in the series system has time delay, and all other modules continue to reversely charge the output end of the protection module. At this moment, reverse negative voltage is applied to the output side of the protection power supply module, negative voltage breakdown of an output internal capacitor can be caused, the fault of the power supply module is further expanded, and liquid leakage and fire accidents of the capacitor can even be caused when the reverse negative voltage is very high.
Therefore, the power supply module mentioned above can only protect the circuit safety when a plurality of power supply modules are used in parallel, but cannot protect the circuit safety when used in series. Therefore, the power module cannot switch the output modes according to the requirements of users, and the service efficiency of the power module is low.
In view of the above description, to solve the above problems, the present application provides a charging protection circuit module and a related product, which will be described in detail below according to embodiments.
Referring to fig. 3, fig. 3 is a schematic view of a charging system according to an embodiment of the present disclosure. As shown in the figure, the charging protection circuit module is applied to a charging system, the charging system 3 includes a charging management unit 31, a plurality of charging units 32, a switch circuit unit 34, a power supply unit 33, a positive output port 35, and a negative output port 36, each of the plurality of charging units 32 includes the charging protection circuit module 321, and the charging protection circuit module 321 includes a diode submodule 3210; the charging management unit 31 is respectively connected to the plurality of charging units 32 and the switch circuit unit 34, the plurality of charging units 32 are respectively connected to the power supply unit 33, and are respectively connected to the positive output port 35 and the negative output port 36 through the switch circuit unit 34, and the operation modes of the switch circuit unit 34 include a series mode and a parallel mode; the charging protection circuit module 321 is configured to adjust a connection relationship between the diode submodule 3210 and other submodules in the charging protection circuit module 321 according to an adjustment instruction of the charging management unit 31, so as to prevent each charging unit 32 from being reversely charged by the output of other charging units, where the adjustment instruction is generated by the charging management unit 31 according to the working mode.
The positive output port and the negative output port are used for connecting a load, and the power supply unit is used for supplying charging current to the plurality of charging units. The charging unit in the scheme has the same function as the power supply module, and can process the electric energy provided by the power supply unit and output the electric energy to the load. In this scheme, the charging management unit may first acquire the operating mode of the switching circuit unit, that is, determine whether the plurality of charging units are output in parallel or output in series. Then the charging management unit can send an adjusting instruction to the charging unit according to the working state, and then the charging protection circuit module can adjust the internal circuit state according to the adjusting instruction, so that the whole charging system can be protected and normally work in a series mode, and can also be protected and normally work in a parallel mode. That is to say, this scheme can realize the switching of series mode or parallel mode, and the charging unit after the switching can not receive the output of other charging units in the system and irritate backward, so that the charging unit is damaged. The output reverse charging is that if the plurality of charging units are connected in series, the current charging unit has slow startup time or other charging units have time delay when the charging unit is shut down, or if the plurality of charging units are connected in parallel and the current charging unit has a fault, other charging units can reversely charge the current charging unit, so that the current charging unit receives the output reverse charging of other charging units. In particular, when a plurality of charging units are connected in series, the output back-flow includes negative back-flow, i.e. a situation occurs where a negative voltage in the opposite direction is applied to the charging unit.
In a specific implementation, the operating mode of the switch circuit unit may be currently configured, or may be saved in a memory module, and the memory module may be located in the switch circuit unit. The memory module may be a charged Erasable Programmable read only memory (EEPROM). After the charging unit is started and starts to work normally, a working mode switching instruction can be sent to the charging management unit through the switch circuit unit, and the adjusted working mode can be stored in the storage module at the moment, so that the working mode in the storage module can be directly read after the charging unit is powered on next time. Of course, the operation mode corresponding to the switching circuit unit may be stored every time the charging unit is started. In the scheme, the charging management unit obtains the working mode generation adjustment instruction after the charging unit starts to be powered on, and at this time, data initialization configuration can be performed on the charging unit at the same time. And when the data initialization is completed and the connection relation between the diode submodule and other submodules in the charging protection circuit module is also adjusted, the charging unit starts to work. The power supply unit in the scheme can comprise a three-phase alternating current to direct current (AC/DC) power supply or a single-phase AC/DC power supply, a direct current to direct current (DC/DC) power supply and the like.
In this example, the charging management unit is respectively connected to the plurality of charging units and the switch circuit unit, the plurality of charging units are respectively connected to the power supply unit, and are respectively connected to the positive output port and the negative output port through the switch circuit unit, and the operation modes of the switch circuit unit include a series mode and a parallel mode; the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to an adjusting instruction of the charging management unit so as to prevent each charging unit from being reversely irrigated by the output of other charging units, and the adjusting instruction is generated by the charging management unit according to the working mode. Therefore, the requirement of parallel application of a plurality of charging unit outputs can be met, and the problem of reliability risk of negative pressure reverse irrigation of a plurality of charging unit outputs in series can be solved.
In one possible example, please refer to fig. 4, where fig. 4 is a schematic structural diagram of a charging unit according to an embodiment of the present disclosure. As shown, each charging unit 4 further comprises a processing module 41; the processing module 41 is connected with the charging protection circuit module 42; the charging protection circuit module 42 is configured to adjust a connection relationship between the diode submodule and other submodules in the charging protection circuit module 42 according to the adjustment instruction of the charging management unit, so as to prevent each processing module 41 from being inversely charged by the output of other charging units.
The processing module comprises a capacitance submodule which can be used for realizing filtering in a circuit, and the capacitance submodule can comprise an electrolytic capacitor. When the charging unit is connected with other charging units in parallel or in series, the connection relationship between the diode submodule and other submodules in the charging protection circuit module is adjusted, so that when a plurality of charging units are connected in parallel, if the output voltage of one charging unit is too low or an internal short circuit fault occurs, or when a plurality of charging units are connected in series, if the current charging unit and other charging units cannot be started or shut down simultaneously, and the like, the situation that other charging units also cause output reverse flow to a processing module in the current charging unit, and finally the circuit safety is influenced is avoided.
In a specific implementation, the processing module comprises a power correction sub-module and/or an isolation transformation sub-module; the power supply unit is connected with the processing module, and the power correction sub-module is connected with the isolation transformation sub-module through an electrolytic capacitor; the power correction submodule is used for performing power correction on the obtained electric energy of the power supply unit, the isolation transformation submodule is used for converting the voltage value so as to output the converted voltage value, and the electrolytic capacitor is used for filtering. As shown in fig. 5, fig. 5 is a schematic structural diagram of a processing module provided in the embodiment of the present application, where the power correction submodule is a direct current to direct current (AC/DC) power correction submodule, and the isolation transformer submodule is a direct current to direct current (DC/DC) isolation transformer submodule. The power supply unit is connected with three-phase alternating current (A phase, B phase and C phase) and PE ground, internal direct current bus voltages Vbus + and Vbus-are output through the AC/DC power correction sub-module, and then the internal direct current bus voltages Vbus + and Vbus-are output through the DC/DC isolation transformer sub-module.
Therefore, in the embodiment, the output end of the processing module is connected with the charging protection circuit module, so that the requirement of parallel application of output of a plurality of charging units can be met, and the problem of reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
In one possible example, please refer to fig. 6, and fig. 6 is a schematic structural diagram of a charging protection circuit module according to an embodiment of the present disclosure. As shown in the figure, the charging protection circuit module further comprises a switch circuit submodule, and the processing module comprises a capacitor submodule; the positive electrode of the capacitor sub-module is connected with the first port of the switch circuit sub-module, the second port of the switch circuit sub-module is connected with the positive electrode of the diode sub-module, the third port of the switch circuit sub-module is combined with the negative electrode of the diode sub-module and then connected with the positive electrode output port, and the negative electrode of the capacitor sub-module is combined with the fourth port of the switch circuit sub-module and then connected with the negative electrode output port; when the working mode is the series mode, the charging protection circuit module is configured to adjust a connection relationship between the diode submodule and other submodules in the charging protection circuit module according to the adjustment instruction of the charging management unit, where the connection relationship is as follows: the first port is connected with the third port, and the second port is connected with the fourth port, so that the capacitor sub-module is prevented from being output by other charging units and flowing backwards; when the working mode is the parallel mode, the charging protection circuit module is configured to adjust a connection relationship between the diode submodule and other submodules in the charging protection circuit module according to the adjustment instruction of the charging management unit, where the connection relationship is as follows: the first port is connected with the second port so as to prevent the capacitor submodule from being reversely filled by the output of other charging units.
When a plurality of charging units are connected in parallel, the connection between the anode output end of the capacitor submodule and the anode of the diode submodule, namely the anode, can be realized by connecting the first port and the second port of the switch circuit submodule, the cathode of the diode submodule, namely the cathode, is connected with the anode output port of the charging system, and the cathode output end of the capacitor submodule is directly connected with the cathode output port of the charging system. Therefore, the diode submodule can realize the function of a check diode, and even if the voltage of the unit charging unit is low, other charging units cannot reversely charge the capacitor submodule in the processing module. Or when the short circuit fault occurs in the charging unit, the diode submodule can completely separate the failed charging unit from other charging units connected in parallel, so that the problem of circuit safety caused by reverse filling fault caused by other charging units connected in parallel is avoided.
When the plurality of charging units are connected in series, the first port and the third port of the switch circuit submodule and the fourth port and the second port of the switch circuit submodule can be connected to directly connect the positive output end of the capacitor submodule and the positive output port of the charging system, the negative output end of the switch circuit submodule is connected with the anode of the diode submodule, and then the cathode of the diode submodule is connected with the positive output port of the charging system. Therefore, when a plurality of charging units are connected in series for working, even if the starting time sequence of each charging unit is asynchronous, in the process of establishing the output voltage of the advanced charging unit, the diode submodule can clamp the voltage at the output end of the charging unit to the conducting voltage of the diode submodule, the negative voltage at the output end of the charging unit is avoided, and the capacitor submodule in the processing module is reversely charged. And this diode submodule piece is connected through above-mentioned mode with the switch circuit submodule piece, can avoid establishing ties the problem that appears the reverse negative pressure at the charging unit output under any operating mode when using, has promoted the reliability of a plurality of charging unit series connection during operation by a wide margin to and the on-state loss when reducing a plurality of charging unit series connections.
Therefore, in the embodiment, the connection relation of the internal ports of the switch circuit subunits is changed, so that the requirement of parallel application of output of a plurality of charging units can be met, and the problem of reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
In one possible example, the method for adjusting the connection relationship between the diode submodule and other submodules in the charge protection circuit module according to the adjustment instruction of the charge management unit includes: determining a first moment, wherein the first moment is a moment when the charging management unit generates the adjustment instruction; and determining that the adjustment of the connection relation between the diode submodule and other submodules in the charging protection circuit module is completed at a second moment, wherein the second moment and the first time interval are preset for a period of time.
After the charging management unit generates the adjustment instruction, the switch circuit submodule performs connection of the corresponding port according to the instruction, and in order to ensure that each connection action is completed before the charging unit is started, the charging unit can be started again after a preset time interval is formed after the adjustment instruction is generated. Of course, since the charging unit may also perform data initialization at the same time when adjusting the connection relationship of the internal ports of the switch circuit sub-module, it is also necessary to determine that the data initialization is completed and the connection relationship of the internal ports in the switch circuit sub-module is also adjusted and then start the charging unit.
Therefore, in this example, the adjustment of the connection relationship of the internal port of the default switch circuit submodule is completed after the preset time period, which not only can ensure that the processing module can work normally, but also does not consume other resources to determine whether the adjustment of the connection relationship of the internal port of the switch circuit submodule is completed.
In one possible example, please refer to fig. 7, and fig. 7 is a circuit diagram of a charge protection circuit module according to an embodiment of the present disclosure. As shown, the switch circuit submodule includes a first switch K1 and a second switch K2, the first port is a first end C of the first switch K1 and a first end a of the second switch K2, the second port is a second end D of the first switch K1, the third port is a second end B of the second switch K2, and the fourth port is a third end E of the first switch K1.
When the plurality of charging units are connected in parallel, the first end and the second end of the first switch are disconnected, and the first end and the second end of the second switch are connected. The connection relationship at this time is that the anode of the capacitor submodule is connected with the anode of the diode submodule and is connected with the anode output port through the diode submodule. And the cathode of the capacitor submodule is directly connected with the cathode output port. Therefore, even if the output voltage of the current charging unit is lower than that of other charging units, the current charging unit cannot be reversely charged by the output of other charging units due to the corresponding one-way conduction characteristic of the diode submodule, and the diode submodule is reversely charged. Or if the current charging unit has an internal short-circuit fault, the diode submodule can enable the current charging unit to be separated from other charging units connected in parallel, so that the current charging unit is prevented from being reversely irrigated by the output of other charging units.
When the plurality of charging units are connected in series, the first end and the second end of the first switch are closed, and the third end and the second end of the second switch are closed. The positive electrode of the capacitor submodule is directly connected with the positive electrode output port, the negative electrode of the capacitor submodule is connected with the negative electrode output port and is also connected with the positive electrode output port through the diode submodule, so that the diode submodule is connected with the positive electrode output side of the capacitor submodule in parallel. Therefore, a clamping voltage can be provided for the anode output side of the capacitor submodule through the diode submodule, when a plurality of charging units are connected in series, if the starting time of the current charging unit is slow, or when other charging units are delayed due to shutdown, the output side of the capacitor submodule has a clamping voltage connected in parallel, so that other charging units cannot charge the capacitor submodule reversely, the capacitor submodule is subjected to reverse breakdown, and even a leakage fire accident of the capacitor submodule occurs.
Therefore, in the embodiment, the closing conditions of the first switch and the second switch are adjusted, so that the requirement of parallel application of output of a plurality of charging units can be met, and the problem of reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
In a possible example, please refer to fig. 8, fig. 8 is a circuit schematic diagram of another charging protection circuit module according to an embodiment of the present application, in which the switch circuit sub-module includes a third switch K3 and a fourth switch K4, the first port is a first end a of the third switch K3, the third port is a second end B of the third switch K3, the second port is a third end C of the third switch K3 and a second end E of the fourth switch K4, and the fourth port is a first end D of the fourth switch K4.
When the plurality of charging units are connected in parallel, the first end of the third switch is connected with the third end, and the first end of the fourth switch is disconnected with the second end. The connection relationship at this time is that the anode of the capacitor submodule is connected with the anode of the diode submodule and is connected with the anode output port through the diode submodule. And the cathode of the capacitor submodule is directly connected with the cathode output port. Therefore, even if the output voltage of the current charging unit is lower than that of other charging units, the current charging unit cannot be reversely charged by the output of other charging units due to the corresponding one-way conduction characteristic of the diode submodule, and the diode submodule is reversely charged. Or if the current charging unit has an internal short-circuit fault, the diode submodule can enable the current charging unit to be separated from other charging units connected in parallel, so that the current charging unit is prevented from being reversely irrigated by the output of other charging units.
When a plurality of charging units are connected in series. The first end of the third switch is connected with the second end, and the first end of the fourth switch is connected with the second end. The positive electrode of the capacitor submodule is directly connected with the positive electrode output port, the negative electrode of the capacitor submodule is connected with the negative electrode output port and is also connected with the positive electrode output port through the diode submodule, so that the diode submodule is connected with the positive electrode output side of the capacitor submodule in parallel. Therefore, a clamping voltage can be provided for the anode output side of the capacitor submodule through the diode submodule, when a plurality of charging units are connected in series, if the starting time of the current charging unit is slow, or when other charging units are delayed due to shutdown, the output side of the capacitor submodule has a clamping voltage connected in parallel, so that other charging units cannot charge the capacitor submodule reversely, the capacitor submodule is subjected to reverse breakdown, and even a leakage fire accident of the capacitor submodule occurs.
Therefore, in the embodiment, the closing conditions of the third switch and the fourth switch are adjusted, so that the requirement of parallel application of output of a plurality of charging units can be met, and the problem of reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
In one possible example, the diode submodule includes a diode.
The diode submodule is not limited to a diode, and can be other devices or circuits capable of achieving a one-way conduction function.
Therefore, in the embodiment, the safety protection of the circuit in the circuit system can be realized according to the unidirectional conduction property of the diode, and the switching circuit sub-module is additionally arranged in front of the diode, so that the parallel application requirement of the output of a plurality of charging units can be met, and the problem of the reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
In one possible example, the first switch and the second switch comprise relay switches.
The first switch and the second switch are not limited to the relay switch device, but may be evolved and replaced by a semiconductor switch device. In a specific embodiment, the third switch and the fourth switch may also be relay switches or devices formed only by evolutionary replacement through semiconductor switching devices. And when the first switch, the second switch, the third switch and the fourth switch are used, the first switch, the second switch, the third switch and the fourth switch can be the same type of switch devices or different types of switch devices respectively.
Therefore, in the embodiment, the connection relation of the internal ports of the switch circuit sub-modules is adjusted through the relay switch, so that the switching of the working modes can be realized quickly, the charging unit can meet the requirement of output parallel application, and the problem of reliability risk of negative pressure reverse irrigation when the processing module is in a series mode can be solved.
The embodiment of the present application further provides a charging unit, which is applied to a charging system, the charging system includes a charging management unit, the charging unit, a switch circuit unit, a power supply unit, a positive output port and a negative output port, the charging unit includes: the processing module is connected with the power supply unit and used for receiving and storing the charging current from the power supply unit; and the charging protection circuit module is connected with the processing module and the positive electrode output port and the negative electrode output port through the switch circuit unit, and is used for realizing the functions described in any one of the charging protection circuit modules in the embodiments.
Referring to fig. 9, fig. 9 is a schematic structural diagram of a charging device according to an embodiment of the present disclosure. As shown in fig. 9, an embodiment of the present application provides a charging device, which is applied to a charging system, where the charging system includes the charging device 9, a charging management unit, a switching circuit unit, and a power supply unit, and the charging device 9 includes: a plurality of charging units 91 respectively connected to the power supply unit and the charging management unit, for implementing the functions described in the charging unit in the above embodiments; and the positive electrode output port 92 and the negative electrode output port 93 are connected with the plurality of charging units through the switch circuit unit and connected with a load for supplying power to the load.
The embodiment of the application provides a charging device, which comprises the charging protection circuit module or the charging unit or the charging device.
The above embodiments are merely representative of the centralized embodiments of the present invention, and the description thereof is specific and detailed, but it should not be understood as the limitation of the scope of the present invention, and it should be noted that those skilled in the art can make various changes and modifications without departing from the spirit of the present invention, and these changes and modifications all fall into the protection scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.
Claims (9)
1. A charging protection circuit module is characterized by being applied to a charging system, wherein the charging system comprises a charging management unit, a plurality of charging units, a switch circuit unit, a power supply unit, a positive electrode output port and a negative electrode output port, each charging unit in the plurality of charging units comprises the charging protection circuit module, and the charging protection circuit module comprises a diode submodule;
the charging management unit is respectively connected with the plurality of charging units and the switch circuit unit, the plurality of charging units are respectively connected with the power supply unit and are respectively connected with the anode output port and the cathode output port through the switch circuit unit, and the working modes of the switch circuit unit comprise a series mode and a parallel mode;
the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to an adjustment instruction of the charging management unit so as to prevent each charging unit from being reversely irrigated by the output of other charging units, and the adjustment instruction is generated by the charging management unit according to the working mode;
each charging unit further comprises a processing module;
the processing module is connected with the charging protection circuit module;
the charging protection circuit module is used for adjusting the connection relation between the diode submodule and other submodules in the charging protection circuit module according to the adjusting instruction of the charging management unit so as to prevent each processing module from being reversely irrigated by the output of other charging units;
the charging protection circuit module further comprises a switch circuit submodule, and the processing module comprises a capacitor submodule;
the positive electrode of the capacitor sub-module is connected with the first port of the switch circuit sub-module, the second port of the switch circuit sub-module is connected with the positive electrode of the diode sub-module, the third port of the switch circuit sub-module is combined with the negative electrode of the diode sub-module and then connected with the positive electrode output port, and the negative electrode of the capacitor sub-module is combined with the fourth port of the switch circuit sub-module and then connected with the negative electrode output port;
when the working mode is the series mode, the charging protection circuit module is configured to adjust a connection relationship between the diode submodule and other submodules in the charging protection circuit module according to the adjustment instruction of the charging management unit, where the connection relationship is as follows: the first port is connected with the third port, and the second port is connected with the fourth port, so that the capacitor sub-module is prevented from being output by other charging units and flowing backwards;
when the working mode is the parallel mode, the charging protection circuit module is configured to adjust a connection relationship between the diode submodule and other submodules in the charging protection circuit module according to the adjustment instruction of the charging management unit, where the connection relationship is as follows: the first port is connected with the second port so as to prevent the capacitor submodule from being reversely filled by the output of other charging units.
2. The module according to claim 1, wherein the method for adjusting the connection relationship between the diode submodule and other submodules in the charging protection circuit module according to the adjustment instruction of the charging management unit comprises:
determining a first moment, wherein the first moment is a moment when the charging management unit generates the adjustment instruction;
and determining that the adjustment of the connection relation between the diode submodule and other submodules in the charging protection circuit module is completed at a second moment, wherein the second moment and the first moment are separated by a preset time interval.
3. The module of claim 1, wherein the switch circuit submodule includes a first switch and a second switch, the first port is a first terminal of the first switch and a first terminal of the second switch, the second port is a second terminal of the first switch, the third port is a second terminal of the second switch, and the fourth port is a third terminal of the first switch.
4. The module of claim 1, wherein the switch circuit submodule includes a third switch and a fourth switch, the first port is a first terminal of the third switch, the third port is a second terminal of the third switch, the second port is a third terminal of the third switch and a second terminal of the fourth switch, and the fourth port is a first terminal of the fourth switch.
5. The module of any one of claims 1-4, wherein the diode submodules comprise diodes.
6. The module of claim 3, wherein the first switch and the second switch comprise relay switches.
7. The utility model provides a charging unit, its characterized in that is applied to charging system, charging system includes charge management unit, charging unit, switch circuit unit, power supply unit, anodal output port and negative pole output port, charging unit includes:
the processing module is connected with the power supply unit and used for receiving and processing the charging current from the power supply unit;
a charging protection circuit module connected to the processing module and connected to the positive output port and the negative output port through the switch circuit unit, for implementing the functions as described in any one of claims 1 to 6.
8. A charging apparatus, characterized in that, applied to a charging system including the charging apparatus, a charging management unit, a switching circuit unit, and a power supply unit, the charging apparatus includes:
a plurality of charging units respectively connected to the power supply unit and the charging management unit for realizing the functions described in the charging unit of claim 7;
and the positive output port and the negative output port are connected with the plurality of charging units through the switch circuit unit and are connected with a load for supplying power to the load.
9. A charging device, characterized by comprising a charging protection circuit module according to any one of claims 1 to 6 or a charging unit according to claim 7 or a charging apparatus according to claim 8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110487810.4A CN112994193B (en) | 2021-05-06 | 2021-05-06 | Charging protection circuit module and related product |
| PCT/CN2021/143825 WO2022233147A1 (en) | 2021-05-06 | 2021-12-31 | Charging protection circuit module and related product |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110487810.4A CN112994193B (en) | 2021-05-06 | 2021-05-06 | Charging protection circuit module and related product |
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| CN112994193A CN112994193A (en) | 2021-06-18 |
| CN112994193B true CN112994193B (en) | 2021-08-10 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US5779817A (en) * | 1995-06-30 | 1998-07-14 | Webasto-Schade Gmbh | Circuit arrangement of solar cells |
| US20150130421A1 (en) * | 2013-11-08 | 2015-05-14 | John Joseph Bevilacqua, III | Battery management electronics with configurable battery module bypass control |
| CN105449781A (en) * | 2015-12-30 | 2016-03-30 | 西安特锐德智能充电科技有限公司 | Discharge circuit for preventing voltages of batteries from flowing backwards and control method |
| CN208508566U (en) * | 2018-07-07 | 2019-02-15 | 深圳驿普乐氏科技有限公司 | A kind of DC power supply and its series-parallel circuit |
| CN109640460A (en) * | 2019-02-01 | 2019-04-16 | 江西晶磊科技有限公司 | A kind of LED is without frequent flashing control circuit |
| CN110021926A (en) * | 2019-05-24 | 2019-07-16 | 西安特锐德智能充电科技有限公司 | A kind of DC output circuit and charging pile |
| CN111211553A (en) * | 2020-03-19 | 2020-05-29 | 深圳市创耀电子科技有限公司 | Double-direct-current power supply series-parallel switching circuit and charging system |
| CN211377885U (en) * | 2020-04-01 | 2020-08-28 | 石家庄通合电子科技股份有限公司 | Output switching circuit |
| CN111342672A (en) * | 2020-04-09 | 2020-06-26 | 深圳市华瑞新能源技术有限公司 | Charging device for preventing reverse filling through phase shift control of hybrid switch and control method thereof |
| CN112994193B (en) * | 2021-05-06 | 2021-08-10 | 深圳市永联科技股份有限公司 | Charging protection circuit module and related product |
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| CN112994193A (en) | 2021-06-18 |
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