CN220822685U - Series-parallel connection switching module, direct current power supply assembly and power supply system - Google Patents

Abstract

The utility model discloses a serial-parallel connection switching module, a direct current power supply assembly and a power supply system. The series-parallel connection switching module is used for a direct current power supply device, the direct current power supply device comprises an anode output end, a cathode output end, a neutral line output end, two first direct current power supply units and two second direct current power supply units with equal voltage, and the series-parallel connection switching module comprises a neutral line switch connected in series between the anode of the first direct current power supply unit or the anode of the second direct current power supply unit and the neutral line output end. The direct current power supply assembly comprises a direct current power supply device and the serial-to-parallel switching module. The power supply system comprises the direct current power supply assembly and the converter device. The utility model can adapt to different current transformers and different operation requirements of the current transformers, and is simple to operate.

Description

Series-parallel connection switching module, direct current power supply assembly and power supply system

Technical Field

The utility model relates to the technical field of power supply, in particular to a series-parallel connection switching module, a direct current power supply assembly and a power supply system.

Background

The uninterruptible power supply is used as a power supply system, an energy storage device is connected with a current transformer, the energy storage device is charged through the current transformer when the commercial power is normal, and the direct current of the energy storage device is converted into alternating current through the current transformer when the commercial power is abnormal. The current transformer has two types, one of which comprises a neutral potential point and the other of which does not comprise a neutral potential point.

The energy storage device is formed by the direct current power supply device, and the direct current power supply device generally comprises a positive electrode output end and a negative electrode output end, and if the current transformer device comprises a neutral potential point, the neutral potential point of the direct current power supply device needs to be found when the energy storage device and the current transformer device are connected, and time and labor are wasted.

Disclosure of utility model

The utility model aims to overcome the defects or problems in the background art, and provides a series-parallel connection change-over switch, a direct current power supply assembly and a power supply system, which can adapt to different current converting devices and different operation requirements of the current converting devices and are simple to operate.

To achieve the above object, the present utility model and its related embodiments adopt the following technical solutions, but are not limited to the following solutions:

the first technical scheme and related embodiments thereof relate to a series-parallel switching module, which is used for a direct current power supply device, wherein the direct current power supply device comprises a positive electrode output end, a negative electrode output end, a neutral line output end, and two first direct current power supply units and second direct current power supply units with equal voltage, the positive electrode of the first direct current power supply unit is connected with the positive electrode output end, the negative electrode of the second direct current power supply unit is connected with the negative electrode output end, and the series-parallel switching module comprises a first switch used for connecting the first direct current power supply unit and the second direct current power supply unit in series, a second switch used for connecting the positive electrodes of the first direct current power supply unit and the second direct current power supply unit in parallel, a third switch used for connecting the negative electrodes of the first direct current power supply unit and the second direct current power supply unit in parallel, and a neutral line switch connected in series between the negative electrode of the first direct current power supply unit or the positive electrode of the second direct current power supply unit and the neutral line output end.

A second technical solution is based on the first technical solution and is a preferred embodiment of the first technical solution, wherein the first dc power supply unit includes N first dc power supply electronic units, and the second dc power supply unit includes M second dc power supply electronic units; wherein N and M are positive integers; the series-parallel switching module comprises a fourth switching unit for realizing the series connection of the first direct current power supply electronic units, a fifth switching unit for realizing the parallel connection of the first direct current power supply electronic units when N is larger than 1, and a seventh switching unit for realizing the series connection of the second direct current power supply electronic units and an eighth switching unit for realizing the parallel connection of the second direct current power supply electronic units when M is larger than 1.

A third technical solution and related embodiments relate to a dc power supply assembly, including a dc power supply device and a serial-parallel switching module according to the first technical solution for the dc power supply device.

A fourth technical solution is based on the third technical solution and is a preferred embodiment of the third technical solution, wherein the battery pack further comprises a battery pack and a case; the battery pack, the direct current power supply device and the series-parallel connection switching module are all accommodated in the box body; the first direct current power supply unit and the second direct current power supply unit are respectively a first DC/DC conversion unit and a second DC/DC conversion unit; the input ends of the first DC/DC conversion unit and the second DC/DC conversion unit are connected into a battery pack, and the output ends are provided with an anode and a cathode.

A fifth technical means is based on the fourth technical means and is a preferred embodiment of the fourth technical means, wherein the first DC/DC conversion unit includes N first DC/DC converters, the second DC/DC conversion unit includes M second DC/DC converters, and an input end of each first DC/DC converter and an input end of each second DC/DC converter are connected to the battery pack; wherein N and M are positive integers; the series-parallel switching module comprises a fourth switching unit for realizing the series connection of the first DC/DC converters, a fifth switching unit for realizing the parallel connection of the first DC/DC converters when N is larger than 1, and comprises a seventh switching unit for realizing the series connection of the second DC/DC converters and an eighth switching unit for realizing the parallel connection of the second DC/DC converters when M is larger than 1.

A sixth technical solution is based on the third technical solution, and is a preferred embodiment of the third technical solution, wherein the dc power supply device includes a plurality of dc power supply modules connected in parallel and a combiner module; each direct current power supply module comprises a first direct current power distribution unit and a second direct current power distribution unit, and the first direct current power distribution unit and the second direct current power distribution unit are respectively provided with an anode and a cathode; the bus module comprises an anode output terminal, a cathode output terminal, a neutral line output terminal, a first anode busbar and a first cathode busbar corresponding to the first direct current power distribution unit, and a second anode busbar and a second cathode busbar corresponding to the second direct current power distribution unit, wherein the anode output terminal, the cathode output terminal and the neutral line output terminal respectively form an anode output end, a cathode output end and a neutral line output end; the serial-parallel switching module is arranged corresponding to the converging module; the anodes of the corresponding first direct current power distribution units in the direct current power supply modules are connected in parallel with the corresponding first positive electrode busbar so that the first positive electrode busbar forms the positive electrode of the first direct current power supply unit, and the cathodes of the corresponding first direct current power distribution units in the direct current power supply modules are connected in parallel with the corresponding first negative electrode busbar so that the first negative electrode busbar forms the negative electrode of the first direct current power supply unit; the anodes of the corresponding second direct current power distribution units in the direct current power supply modules are connected in parallel with the corresponding second positive electrode busbar so that the second positive electrode busbar forms the anode of the second direct current power supply unit, and the cathodes of the corresponding second direct current power distribution units in the direct current power supply modules are connected in parallel with the corresponding second negative electrode busbar so that the second negative electrode busbar forms the cathode of the second direct current power supply unit.

A seventh technical means is based on the sixth technical means, and is a preferred embodiment of the sixth technical means, wherein the dc power module further includes a battery pack; the first direct current power distribution unit comprises N first DC/DC converters, and the second direct current power distribution unit comprises M second DC/DC converters; the input end of each first DC/DC converter and the input end of each second DC/DC converter are connected into a battery pack, and the output end is provided with an anode and a cathode; wherein N and M are positive integers; the bus module comprises N first positive electrode bus bars and N first negative electrode bus bars corresponding to the first direct current power distribution unit, and M second positive electrode bus bars and M second negative electrode bus bars corresponding to the second direct current power distribution unit; the series-parallel switching module comprises a fourth switching unit for realizing the series connection of the first DC/DC converters and a fifth switching unit for realizing the parallel connection of the first DC/DC converters when N is larger than 1, and comprises a seventh switching unit for realizing the series connection of the second DC/DC converters and an eighth switching unit for realizing the parallel connection of the second DC/DC converters when M is larger than 1.

An eighth technical solution and related embodiments thereof relate to a power supply system, including a plurality of dc power supply assemblies and current transformers according to any one of the third to fifth technical solutions, wherein positive output ends of the dc power supply assemblies are connected in parallel to form a total positive output end, negative output ends of the dc power supply assemblies are connected in parallel to form a total negative output end, and neutral output ends of the dc power supply assemblies are connected in parallel to form a total neutral output end; the current transformation device is a first current transformation device or a second current transformation device electrically coupled with each direct current power supply assembly, wherein the first current transformation device comprises a neutral potential point; the second deflector does not comprise a neutral potential point.

A ninth technical solution and related embodiments thereof relate to a power supply system, which is characterized by comprising a dc power supply assembly and a current transformer as described in the sixth or seventh technical solution, wherein the current transformer is a first current transformer or a second current transformer electrically coupled to the dc power supply assembly, and the first current transformer includes a neutral potential point; the second deflector does not comprise a neutral potential point.

A tenth technical means is based on the eighth or ninth technical means, further comprising a controller and a trigger; the series-parallel switching module is an electric control module; the trigger is provided with an operation end, and the operation end sends a first signal, a second signal or a third signal to the controller when being operated; the controller is suitable for controlling the series-parallel connection switching module to connect the first direct current power supply unit and the second direct current power supply unit in series when receiving the first signal; the controller is suitable for receiving a second signal to control the series-parallel switching module to enable the first direct current power supply unit and the second direct current power supply unit to be connected in parallel; the controller is suitable for receiving a third signal to control the first direct current power supply unit and the second direct current power supply unit to be connected in series and the neutral line switch to be closed.

As can be seen from the above description of the present utility model and the specific embodiments thereof, compared with the prior art, the technical solution of the present utility model and the related embodiments thereof have the following beneficial effects due to the following technical means:

The applicant can be seen from continuous observation, experiments and researches, in the prior art, the technical problem that the direct current power supply device cannot adapt to the current transformer with a neutral line is caused because the direct current power supply device is only provided with a positive output port and a negative output port, when the current transformer is provided with the neutral line, a neutral potential point of the direct current power supply device needs to be found, and then the neutral potential point of the direct current power supply device is electrically connected with the neutral potential point of the current transformer, so that the operation is time-consuming and labor-consuming.

In the first technical solution and related embodiments, since the dc power supply device has a neutral line output end, the serial-parallel switching module includes a neutral line switch, when the converter device requires a large voltage and is not configured with a neutral potential point, the first switch is closed to connect the first dc power supply unit and the second dc power supply unit in series, so that the dc power supply device can output a large output voltage; when the converter device requires large voltage and is provided with a neutral voltage point, the first switch is closed to enable the first direct current power supply unit and the second direct current power supply unit to be connected in series, and the neutral switch is closed, so that the direct current power supply device can output large output voltage, and the neutral output end is conducted; when the converter device requires large current, no matter whether the converter device has a neutral potential point or not, the second switch and the third switch are closed to connect the first direct current power supply unit and the second direct current power supply unit in parallel, so that the direct current power supply device can output large output current. Therefore, the direct current power supply device in the technical scheme can meet the operation requirement (high current or voltage) of the current transformer, can be suitable for the current transformer with a neutral potential point, and is simple to operate.

In the second technical solution and related embodiments, for different operation requirements of the current transformer, for example, the current transformer needs a large voltage, but the value of the large voltage is different, or the current transformer needs a large current, but the value of the large current is different, so long as the voltages of the first dc power supply unit and the second dc power supply unit are ensured to be equal, the first dc power supply unit can have different output currents and output voltages through the combination of series-parallel connection of the first dc power supply electronic units in the first dc power supply unit, and the second dc power supply unit can also have different output currents and output voltages through the combination of series-parallel connection of the second dc power supply electronic units in the second dc power supply unit; for example, when the first dc power supply unit includes four first dc power supply units, the fourth switch unit may be used to connect the four first dc power supply units in series to output a first voltage value, or two of the four first dc power supply units may be connected in series to form a group through cooperation of the fourth switch unit and the fifth switch unit, and the two groups are connected in parallel to form a first dc power supply unit having a second voltage value; or only one or two first direct current power supply and electronic units are connected according to the requirements of the converter device, so that the second technical scheme can further meet various operation requirements of the converter device.

In the third technical means and related embodiments, there are technical effects similar to those of the first technical means.

In a fourth technical solution and related embodiments, the first DC power supply unit and the second DC power supply unit are a first DC/DC conversion unit and a second DC/DC conversion unit, and input ends of the first DC/DC conversion unit and the second DC/DC conversion unit are connected to the battery pack, so that the same battery pack can realize different output currents and output voltages through serial-parallel switching of the first DC/DC conversion unit and the second DC/DC conversion unit. In practical application, a plurality of direct current power supply components of the fourth technical scheme can be matched for use, and each direct current power supply component is provided with a series-parallel switching module, so that each direct current power supply component can be independently controlled, the direct current power supply component is more flexible, and the switching level in the series-parallel switching module is lower.

In the fifth technical means and related embodiments, the same technical effects as those of the second technical means are exhibited.

In a sixth technical solution and related embodiments, a plurality of dc power supply modules are connected in parallel to a bus module, so that a first dc power supply unit is formed by connecting first dc power distribution units in the plurality of dc power supply modules in parallel, a second dc power supply unit is formed by connecting second dc power distribution units in the plurality of dc power supply modules in parallel, and a series-parallel connection module is arranged corresponding to the bus module.

In a seventh aspect and related embodiments, the first DC power distribution unit includes N first DC/DC converters, and the second DC power distribution unit includes M second DC/DC converters; the input end of each first DC/DC converter and the input end of each second DC/DC converter are connected into a battery pack, so that the same battery pack can realize different output currents and output voltages through the serial-parallel switching of N first DC/DC converters and M second DC/DC converters; further, the seventh technical means has the same technical effects as the second technical means.

In the eighth technical means and related embodiments, there are technical effects similar to those of the third, fourth or fifth technical means.

In the ninth technical means and related embodiments, there are technical effects similar to those of the sixth or seventh technical means.

In the tenth technical solution and related embodiments, the switching of the series-parallel connection modules can be controlled by a trigger, which is easy to operate.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required to be used in the description of the embodiments below are briefly introduced, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of a DC power supply assembly according to a first embodiment of the present utility model;

FIG. 2 is a schematic diagram of a DC power supply assembly according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of a trigger, a controller and a series-parallel switching module according to an embodiment of the present utility model;

FIG. 4 is a schematic diagram of a DC power supply assembly according to a second embodiment of the present utility model;

FIG. 5 is a schematic diagram of a third DC power module according to an embodiment of the present utility model;

Fig. 6 is a schematic diagram of a first dc power supply unit and a second dc power supply unit formed by connecting each dc power supply module in parallel according to a third embodiment of the present utility model;

Fig. 7 is a schematic diagram of a parallel connection of dc power supply modules to form a first dc power supply unit and a second dc power supply unit according to a fourth embodiment of the present utility model;

The main reference numerals illustrate:

A direct current power supply device 10; a DC power supply module 11; a battery pack 111; a first DC/DC conversion unit 112; a first DC/DC converter 1121; a second DC/DC conversion unit 113; a second DC/DC converter 1131; a case 12; a first positive electrode busbar 131A; a first negative electrode busbar 131B; a second positive electrode busbar 132A; a first negative electrode busbar 131B; a positive electrode output terminal 133; a negative output terminal 134; neutral output terminal 135; a first direct current power supply unit 21; a second dc power supply unit 22; a serial-to-parallel switching module 30; a first switch S1; a second switch S2; a third switch S3; a neutral line switch S0; a fourth switch S4; a fifth switch S5; a sixth switch S6; a seventh switch S7; an eighth switch S8; a ninth switch S9; a controller 40; a trigger 50.

Detailed Description

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It is to be understood that the described embodiments are preferred embodiments of the utility model and should not be taken as excluding other embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without creative efforts, are within the protection scope of the present utility model.

In the claims, specification and drawings hereof, unless explicitly defined otherwise, the terms "first," "second," or "third," etc. are used for distinguishing between different objects and not for describing a particular sequential order.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, references to orientation or positional relationship such as the terms "center", "lateral", "longitudinal", "horizontal", "vertical", "top", "bottom", "inner", "outer", "upper", "lower", "front", "rear", "left", "right", "clockwise", "counterclockwise", etc. are based on the orientation and positional relationship shown in the drawings and are merely for convenience of description and to simplify the description, and do not indicate or imply that the apparatus or element referred to must have a particular orientation or be constructed and operated in a particular orientation, nor should it be construed as limiting the particular scope of the utility model.

In the claims, specification and drawings of the present utility model, unless explicitly defined otherwise, the term "fixedly connected" or "fixedly connected" should be construed broadly, i.e. any connection between them without a displacement relationship or a relative rotation relationship, that is to say includes non-detachably fixedly connected, integrally connected and fixedly connected by other means or elements.

In the claims, specification and drawings of the present utility model, the terms "comprising," having, "and variations thereof as used herein, are intended to be" including but not limited to.

Example 1

This embodiment shows a power supply system, see fig. 1-3, comprising several dc power supply components, a current transformer, a controller 40 and a trigger 50.

The dc power supply assembly includes a dc power supply device 10, a serial-to-parallel switching module 30, a battery pack 111, and a case 12. The dc power supply device 10, the serial-to-parallel switching module 30, and the battery pack 111 are all accommodated in the case 12.

Referring to fig. 1-2, the dc power supply device 10 includes a positive output terminal, a negative output terminal, a neutral output terminal, and two first dc power supply units 21 and second dc power supply units 22 having equal voltages; the positive electrode of the first dc power supply unit 21 is connected to the positive electrode output terminal, the negative electrode of the second dc power supply unit 22 is connected to the negative electrode output terminal, and the series-parallel switching module 30 includes a first switch S1 for connecting the first dc power supply unit 21 and the second dc power supply unit 22 in series, a second switch S2 for connecting the positive electrodes of the first dc power supply unit 21 and the second dc power supply unit 22 in parallel, a third switch S3 for connecting the negative electrodes of the first dc power supply unit 21 and the second dc power supply unit 22 in parallel, and a neutral line switch S0 connected in series between the negative electrode of the first dc power supply unit 21 or the positive electrode of the second dc power supply unit 22 and the neutral line output terminal. In practical applications, the positive output terminal, the negative output terminal, and the neutral output terminal are formed by a positive output terminal 133, a negative output terminal 134, and a neutral output terminal 135 embedded in a wall of the case 12, and the first dc power supply unit 21 and the second dc power supply unit 22 are accommodated in the case 12. The series-parallel switching module 30 is an electronic control module.

The first dc power supply unit 21 includes N first dc power supply electronic units, and the second dc power supply unit 22 includes M second dc power supply electronic units; wherein N and M are positive integers; here, N and M may be the same or different, and fig. 1 shows a case where N and M are both 1, and in this case, the first dc power supply and electronic unit is the same as the first dc power supply unit 21, and the second dc power supply and electronic unit is the same as the second dc power supply unit 22.

In the present embodiment, referring to fig. 2, the first DC power supply unit 21 and the second DC power supply unit 22 are a first DC/DC conversion unit 112 and a second DC/DC conversion unit 113, respectively; the input ends of the first DC/DC conversion unit 112 and the second DC/DC conversion unit 113 are connected to the battery pack 111, and the output ends are provided with a positive electrode and a negative electrode.

When the direct current power supply device is connected with the current transformer, the positive output ends of the direct current power supply devices 10 are connected in parallel to form a total positive output end, the negative output ends of the direct current power supply devices 10 are connected in parallel to form a total negative output end, and the neutral output ends of the direct current power supply devices 10 are connected in parallel to form a total neutral output end; the current transformation device is a first current transformation device or a second current transformation device electrically coupled with the direct current power supply assembly, wherein the first current transformation device comprises a neutral potential point which is connected with a total positive output end, a total negative output end and a total neutral line output end; the second current transformer does not include a neutral potential point, and is only connected to the total positive output end and the total negative output end of the direct current power supply assembly.

Referring to fig. 3, the trigger 50 is provided with an operation end, and when the operation end is operated, the operation end transmits a switching signal to the controller 40, wherein the switching signal is a first signal, a second signal or a third signal; the controller 40 is adapted to control the serial-parallel switching module 30 to connect each of the first dc power supply unit 21 and the second dc power supply unit 22 in series when receiving the first signal; the controller 40 is adapted to receive the second signal to control the serial-parallel switching module 30 to connect the first dc power supply unit 21 and the second dc power supply unit 22 in parallel; the controller 40 is adapted to receive a third signal to control the first dc power supply unit 21 and the second dc power supply unit 22 to be connected in series and the neutral switch S0 to be closed. Specifically, the operation end may be a key switch disposed in the power supply system, or may be a touch screen, a controller, or the like that is communicatively connected to the power supply system, which is not specifically limited.

Specifically, when the converter device has no neutral line and requires a large voltage (i.e., the dc power supply device 10 is required to operate as a serial no neutral line output), the controller 40 sends a first signal to the operation end of the trigger 50, and after the controller 40 receives the first signal, the first switch S1 is controlled to be closed, and the second switch S2, the third switch S3 and the neutral line switch S0 are all opened; when the converter device has no neutral line and needs large current (namely, the direct current power supply device 10 needs to work in parallel), the operation end of the trigger 50 sends a second signal to the controller 40, and after the controller 40 receives the second signal, the first switch S1 is controlled to be opened, the neutral line switch S0 is controlled to be opened, and the second switch S2 and the third switch S3 are both closed; when the current transformer has a neutral line (i.e. the dc power supply 10 is required to be operated in series and has a neutral line output), a third signal is sent to the controller 40 through the operation end of the trigger 50, and after the controller 40 receives the third signal, the first switch S1 is controlled to be closed, the neutral line switch S0 is closed, and the second switch S2 and the third switch S3 are both opened. The non-neutral current transformer is defined as a second current transformer, the neutral current transformer is defined as a first current transformer, and the definitions are used hereinafter for the first and second current transformers.

Therefore, the direct current power supply assembly of the embodiment can meet the operation requirement (large current or voltage) of the current transformer, and can also be suitable for the current transformer with a neutral potential point.

In other embodiments, the first signal is adapted to control the first switch S1 to close, the second signal is adapted to control the second switch S2 and the third switch S3 to close simultaneously, and the third signal is adapted to control the first switch S1 to close and the neutral switch S0 to close; in the switching process, the first switch S1 is not closed together with the second switch S2 and the third switch S3 all the time, that is, when both the second switch S2 and the third switch S3 are closed, the first switch S1 is in an open state; while the first switch S1 is closed, both the second switch S2 and the third switch S3 are in an open state. Of course, in other states such as off, the first switch S1, the second switch S2 and the third switch S3 may be simultaneously in an off state.

In this embodiment, the input ends of the first DC/DC conversion unit 112 and the second DC/DC conversion unit 113 are both connected to the battery pack 111, so that the same battery pack 111 can realize different output currents and output voltages through the serial-parallel switching of the first DC/DC conversion unit 112 and the second DC/DC conversion unit 113.

In this embodiment, a plurality of dc power supply components are connected in parallel, and each dc power supply component is provided with a series-parallel switching module 30, so that each dc power supply component can be controlled independently, which is more flexible, and makes the switching level in the series-parallel switching module 30 lower.

Example two

The second embodiment is substantially the same as the first embodiment except that:

1. The first dc power supply unit 21 and the second dc power supply unit 22 are different

In this embodiment, N and M are both greater than 1, the first dc power supply unit 21 includes at least two first dc power supply electronic units, and the second dc power supply unit 22 includes at least two second dc power supply electronic units.

In this embodiment, the first DC/DC conversion unit 112 includes N first DC/DC converters 1121, the second DC/DC conversion unit 113 includes M second DC/DC converters 1131, the input end of each first DC/DC converter 1121 and the input end of each second DC/DC converter 1131 are connected to the battery pack 111, and the first DC/DC converter 1121 and the second DC/DC converter 1131 form a first DC power supply unit and a second DC power supply unit, respectively.

2. The series-parallel switching modules 30 are different

Referring to fig. 4, the series-parallel switching module 30 includes a fourth switching unit for implementing the series connection of the first dc power supply units, a fifth switching unit for implementing the parallel connection of the first dc power supply units, and a seventh switching unit for implementing the series connection of the second dc power supply units and an eighth switching unit for implementing the parallel connection of the second dc power supply units when N is greater than 1. The case where N and M are both 4 is shown in fig. 2.

Thus, a fourth switching unit may be used to implement each of the first DC/DC converters 1121 in series, a fifth switching unit may be used to implement each of the first DC/DC converters 1121 in parallel, a seventh switching unit may be used to implement each of the second DC/DC converters 1131 in series, and an eighth switching unit may be used to implement each of the second DC/DC converters 1131 in parallel.

When N and M are 4, referring to fig. 4, the fourth switching unit includes 3 fourth switches, and the fifth switching unit includes 4 fifth switches and 4 sixth switches; the fourth switch is connected in series between the negative electrode of one first direct current power supply electronic unit and the positive electrode of the other first direct current power supply electronic unit, the fifth switch is connected in series between the positive electrode of any first direct current power supply electronic unit and the positive electrode of the first direct current power supply unit, and the sixth switch is connected in series between the negative electrode of any first direct current power supply electronic unit and the negative electrode of the first direct current power supply unit;

The seventh switching unit includes 3 seventh switches, and the eighth switching unit includes 4 eighth switches and 4 ninth switches; the seventh switch is connected in series between the negative electrode of one second direct current power supply electronic unit and the positive electrode of the other second direct current power supply electronic unit, the eighth switch is connected in series between the positive electrode of any second direct current power supply electronic unit and the positive electrode of the second direct current power supply unit, and the ninth switch is connected in series between the negative electrode of any second direct current power supply electronic unit and the negative electrode of the second direct current power supply unit.

The controller 40 is adapted to control the serial-parallel switching module 30 to connect the first dc power supply unit 21 and the second dc power supply unit 22 in series when receiving the first signal; the controller 40 is adapted to receive the second signal to control the serial-parallel switching module 30 to connect the first dc power supply unit 21 and the second dc power supply unit 22 in parallel; the controller 40 is adapted to receive a third signal to control the first dc power supply unit 21 and the second dc power supply unit 22 to be connected in series and the neutral switch S0 to be closed.

In practical applications, the switching of the first dc power supply unit in parallel and the switching of the second dc power supply unit in parallel are also involved, so that at this time, the first signal, the second signal, and the third signal further include the switching of the first dc power supply unit in parallel and the switching of the second dc power supply unit in parallel.

In this embodiment, when the current transformer is a first current transformer, the third signal or the second signal may be sent to the controller 40 through the operation end of the trigger 50, and when the current transformer is a second current transformer, the first signal or the second signal may be sent to the controller 40 through the operation end of the trigger 50.

Specifically, when the second converter device requires a large voltage, the first signal is sent to the controller 40 through the operation end of the trigger 50, after the controller 40 receives the first signal, the first switch S1 is controlled to be closed, the second switch S2, the third switch S3 and the neutral line switch S0 are all opened, the fourth switch S4 is all closed, the fifth switch S5 and the sixth switch S6 are all opened, the seventh switch S7 is all closed, and the eighth switch S8 and the ninth switch S9 are all opened. Thus, the first dc power supply units are connected in series, the second dc power supply units are connected in series, and the first dc power supply unit 21 and the second dc power supply unit 22 are connected in series.

When the first converter device or the second converter device requires large current, the operation end of the trigger 50 sends a second signal to the controller 40, and after the controller 40 receives the second signal, the first switch S1 is controlled to be opened, the neutral line switch S0 is controlled to be opened, and the second switch S2 and the third switch S3 are both closed; the fourth switch S4 is open, the fifth switch S5 and the sixth switch S6 are closed, the seventh switch S7 is open, and the eighth switch S8 and the ninth switch S9 are closed. Thus, the first dc power supply units are connected in parallel, the second dc power supply units are connected in parallel, and the first dc power supply unit 21 and the second dc power supply unit 22 are connected in parallel.

When the first converter device requires a large voltage, the controller 40 sends a third signal to the operation end of the trigger 50, after receiving the third signal, the controller 40 controls the first switch S1 to be closed, the neutral switch S0 to be closed, the second switch S2 and the third switch S3 to be opened, the fourth switch S4 to be closed, the fifth switch S5 and the sixth switch S6 to be opened, the seventh switch S7 to be closed, and the eighth switch S8 and the ninth switch S9 to be opened. Thus, the first dc power supply units are connected in series, the second dc power supply units are connected in series, and the first dc power supply unit 21 and the second dc power supply unit 22 are connected in series.

In practical applications, there is a case that the current transformer needs a large voltage, but the values of the large voltages are not the same, or the current transformer needs a large current, but the values of the large currents are not the same, so long as the voltages of the first dc power supply unit 21 and the second dc power supply unit 22 are ensured to be equal, the first dc power supply unit 21 can have different output currents and output voltages through the combination of the series-parallel connection of the first dc power supply units in the first dc power supply unit 21, and the second dc power supply unit can also have different output currents and output voltages for the series-parallel connection of the second dc power supply units in the second dc power supply unit 22.

For example, although the first current transformer and the second current transformer both require large voltages, the large voltage value required at this time is smaller than the voltage value when the first dc power supply units are connected in series, the second dc power supply units are connected in series, and the first dc power supply unit 21 and the second dc power supply unit 22 are connected in series, at this time, two of the four first dc power supply units can be connected in series as a group by matching the fourth switch unit and the fifth switch unit, and the two groups are connected in parallel again to form the first dc power supply unit 21 with the second voltage value, and in this case, the second dc power supply unit 22 is required to output the second voltage value, and in this case, the first signal, the second signal and the third signal need to be ensured to include the required voltage and the required current information of the current transformer.

It should be understood that in other embodiments, the first dc power supply unit 21 may include N (N > 1) first dc power supply electronic units and the second dc power supply unit 22 includes 1 second dc power supply electronic unit, or the first dc power supply unit 21 may include 1 first dc power supply electronic unit and the second dc power supply unit 22 may include M (M > 1) second dc power supply electronic units.

Example III

This embodiment is substantially the same as embodiment one except that:

1. The DC power supply device 10 is different

In particular, referring to fig. 5-6, the dc power supply device 10 includes a plurality of dc power supply modules 11 and a bus module connected in parallel.

Each direct current power supply module 11 comprises a first direct current power distribution unit and a second direct current power distribution unit, and the first direct current power distribution unit and the second direct current power distribution unit are respectively provided with an anode and a cathode;

The busbar module includes a positive output terminal 133, a negative output terminal 134, a neutral output terminal 135, a first positive busbar 131A and a first negative busbar 131B corresponding to the first dc power distribution unit, and a first positive busbar 131A and a first negative busbar 131B corresponding to the second dc power distribution unit, where the positive output terminal 133, the negative output terminal 134, and the neutral output terminal 135 form a positive output terminal, a negative output terminal, and a neutral output terminal, respectively; the series-parallel switching module 30 is disposed corresponding to the bus module; the anodes of the corresponding first dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first positive busbar 131A so that the first positive busbar 131A forms the positive electrode of the first dc power supply unit 21 in fig. 1, and the cathodes of the corresponding first dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first negative busbar 131B so that the first negative busbar 131B forms the negative electrode of the first dc power supply unit 21 in fig. 1; the anodes of the corresponding second dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first positive busbar 131A so that the first positive busbar 131A forms the anode of the second dc power supply unit 22 in fig. 1, and the cathodes of the corresponding second dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first negative busbar 131B so that the first negative busbar 131B forms the cathode of the second dc power supply unit 22 in fig. 1.

Specifically, the dc power supply module 11 further includes a battery pack 111; the first direct current power distribution unit includes N first DC/DC converters 1121, and the second direct current power distribution unit includes M second DC/DC converters 1131; the input end of each first DC/DC converter 1121 and the input end of each second DC/DC converter 1131 are connected to the battery pack 111; the busbar module includes N first positive electrode busbars 131A and N first negative electrode busbars 131B corresponding to the first dc power distribution units, and M first positive electrode busbars 131A and M first negative electrode busbars 131B corresponding to the second dc power distribution units. It can be understood that N first positive electrode bus bars 131A and N first negative electrode bus bars 131B corresponding to the first dc power distribution units form N first dc power supply and electronic units, and M first positive electrode bus bars 131A and M first negative electrode bus bars 131B corresponding to the second dc power distribution units form M second dc power supply and electronic units.

N and M are both 1 in this embodiment.

2. The series-parallel switching modules 30 are different

In the present embodiment, the serial-parallel switching module 30 is disposed corresponding to the bus module.

In this embodiment, the plurality of dc power supply modules 11 are connected in parallel to the bus module, so that the first dc power supply unit 21 is formed by connecting in parallel first dc power distribution units in the plurality of dc power supply modules 11, the second dc power supply unit 22 is formed by connecting in parallel second dc power distribution units in the plurality of dc power supply modules 11, and the series-parallel connection modules are arranged corresponding to the bus module, so that the embodiment can realize that the plurality of dc power supply modules 11 can perform series-to-parallel switching simultaneously through a group of parallel switching modules, and the control is simpler.

Example IV

The fourth embodiment is substantially the same as the second embodiment, except that,

1. The DC power supply device 10 is different

Specifically, referring to fig. 7, the dc power supply device 10 includes a plurality of dc power supply modules 11 and a bus module connected in parallel.

Each direct current power supply module 11 comprises a first direct current power distribution unit and a second direct current power distribution unit, and the first direct current power distribution unit and the second direct current power distribution unit are respectively provided with an anode and a cathode;

The busbar module includes a positive output terminal 133, a negative output terminal 134, a neutral output terminal 135, a first positive busbar 131A and a first negative busbar 131B corresponding to the first dc power distribution unit, and a first positive busbar 131A and a first negative busbar 131B corresponding to the second dc power distribution unit, where the positive output terminal 133, the negative output terminal 134, and the neutral output terminal 135 form a positive output terminal, a negative output terminal, and a neutral output terminal, respectively; the series-parallel switching module 30 is disposed corresponding to the bus module; the anodes of the corresponding first direct current power distribution units in the direct current power supply modules 11 are connected in parallel to the corresponding first positive electrode busbar 131A so that the first positive electrode busbar 131A forms the positive electrode of the first direct current power supply unit 21, and the cathodes of the corresponding first direct current power distribution units in the direct current power supply modules 11 are connected in parallel to the corresponding first negative electrode busbar 131B so that the first negative electrode busbar 131B forms the negative electrode of the first direct current power supply unit 21; the anodes of the corresponding second dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first positive busbar 131A so that the first positive busbar 131A forms the anode of the second dc power supply unit 22, and the cathodes of the corresponding second dc power distribution units in each dc power supply module 11 are connected in parallel to the corresponding first negative busbar 131B so that the first negative busbar 131B forms the cathode of the second dc power supply unit 22.

Specifically, the dc power supply module 11 further includes a battery pack 111; the first direct current power distribution unit includes N first DC/DC converters 1121, and the second direct current power distribution unit includes M second DC/DC converters 1131; the input end of each first DC/DC converter 1121 and the input end of each second DC/DC converter 1131 are connected to the battery pack 111; the busbar module includes N first positive electrode busbars 131A and N first negative electrode busbars 131B corresponding to the first dc power distribution units, and M first positive electrode busbars 131A and M first negative electrode busbars 131B corresponding to the second dc power distribution units. It can be understood that N first positive electrode bus bars 131A and N first negative electrode bus bars 131B corresponding to the first dc power distribution units form N first dc power supply and electronic units, and M first positive electrode bus bars 131A and M first negative electrode bus bars 131B corresponding to the second dc power distribution units form M second dc power supply and electronic units.

N and M are both 4 in this embodiment.

2. The series-parallel switching modules 30 are different

In the present embodiment, the serial-parallel switching module 30 is disposed corresponding to the bus module.

In this embodiment, the plurality of dc power supply modules 11 are connected in parallel to the bus module, so that the first dc power supply unit 21 is formed by connecting in parallel first dc power distribution units in the plurality of dc power supply modules 11, the second dc power supply unit 22 is formed by connecting in parallel second dc power distribution units in the plurality of dc power supply modules 11, and the series-parallel connection modules are arranged corresponding to the bus module, so that the embodiment can realize that the plurality of dc power supply modules 11 can perform series-to-parallel switching simultaneously through a group of parallel switching modules, and the control is simpler.

The foregoing description of the embodiments and description is presented to illustrate the scope of the utility model, but is not to be construed as limiting the scope of the utility model. Modifications, equivalents, and other improvements to the embodiments of the utility model or portions of the features disclosed herein, as may occur to persons skilled in the art upon use of the utility model or the teachings of the embodiments, are intended to be included within the scope of the utility model, as may be desired by persons skilled in the art from a logical analysis, reasoning, or limited testing, in combination with the common general knowledge and/or knowledge of the prior art.

Claims (10)

1. A series-parallel switching module (30) for a dc power supply device (10), wherein the dc power supply device (10) includes a positive output terminal, a negative output terminal, a neutral output terminal, and two first dc power supply units (21) and a second dc power supply unit (22) having equal voltages, wherein the positive electrode of the first dc power supply unit (21) is connected to the positive output terminal, and the negative electrode of the second dc power supply unit (22) is connected to the negative output terminal, the series-parallel switching module (30) includes a first switch (S1) for connecting the positive electrodes of the first dc power supply unit (21) and the second dc power supply unit (22) in series, a second switch (S2) for connecting the positive electrodes of the first dc power supply unit (21) and the second dc power supply unit (22) in parallel, a third switch (S3) for connecting the negative electrodes of the first dc power supply unit (21) and the second dc power supply unit (22) in parallel, and a neutral output terminal between the positive electrode of the first dc power supply unit (21) and the second dc power supply unit (22) and the neutral output terminal of the neutral switch (S0) in series.

2. A series-parallel switching module (30) according to claim 1, wherein the first dc power supply unit (21) comprises N first dc power supply electronic units, and the second dc power supply unit (22) comprises M second dc power supply electronic units; wherein N and M are positive integers; the series-parallel switching module (30) comprises a fourth switching unit for realizing the series connection of the first direct current power supply electronic units and a fifth switching unit for realizing the parallel connection of the first direct current power supply electronic units when N is larger than 1, and comprises a seventh switching unit for realizing the series connection of the second direct current power supply electronic units and an eighth switching unit for realizing the parallel connection of the second direct current power supply electronic units when M is larger than 1.

3. A direct current supply assembly characterized by comprising a direct current supply device (10) and a series-parallel switching module (30) as claimed in claim 1 for the direct current supply device (10).

4. A dc power supply assembly according to claim 3, further comprising a battery pack (111) and a housing (12);

The battery pack (111), the direct current power supply device (10) and the series-parallel connection switching module (30) are all accommodated in the box body (12); the first direct current power supply unit (21) and the second direct current power supply unit (22) are a first DC/DC conversion unit (112) and a second DC/DC conversion unit (113) respectively; the input ends of the first DC/DC conversion unit (112) and the second DC/DC conversion unit (113) are connected to the battery pack (111), and the output ends are provided with a positive electrode and a negative electrode.

5. A direct current power supply assembly according to claim 4, characterized in that the first DC/DC conversion unit (112) comprises N first DC/DC converters (1121), the second DC/DC conversion unit (113) comprises M second DC/DC converters (1131), the input of each first DC/DC converter (1121) and the input of each second DC/DC converter (1131) are connected to the battery pack (111); wherein N and M are positive integers; the series-parallel switching module (30) comprises a fourth switching unit for realizing the series connection of the first DC/DC converters (1121) and a fifth switching unit for realizing the parallel connection of the first DC/DC converters (1121) when N is larger than 1, and comprises a seventh switching unit for realizing the series connection of the second DC/DC converters (1131) and an eighth switching unit for realizing the parallel connection of the second DC/DC converters (1131) when M is larger than 1.

6. A direct current power supply assembly according to claim 3, characterized in that the direct current power supply means (10) comprises a number of parallel direct current power supply modules (11) and a combiner module; each direct current power supply module (11) comprises a first direct current power distribution unit and a second direct current power distribution unit, and the first direct current power distribution unit and the second direct current power distribution unit are respectively provided with an anode and a cathode; the bus module comprises an anode output terminal (133), a cathode output terminal (134), a neutral line output terminal (135), a first anode busbar (131A) and a first cathode busbar (131B) corresponding to a first direct current power distribution unit, and a second anode busbar (132A) and a second cathode busbar (132B) corresponding to a second direct current power distribution unit, wherein the anode output terminal (133), the cathode output terminal (134) and the neutral line output terminal (135) respectively form an anode output end, a cathode output end and a neutral line output end;

The serial-parallel switching module (30) is arranged corresponding to the converging module;

the anodes of the corresponding first direct current distribution units in the direct current power supply modules (11) are connected in parallel with the corresponding first positive electrode busbar (131A) so that the first positive electrode busbar (131A) forms the anode of the first direct current power supply unit (21), and the cathodes of the corresponding first direct current distribution units in the direct current power supply modules (11) are connected in parallel with the corresponding first negative electrode busbar (131B) so that the first negative electrode busbar (131B) forms the cathode of the first direct current power supply unit (21);

the anodes of the corresponding second direct current distribution units in the direct current power supply modules (11) are connected in parallel with the corresponding second positive electrode busbar (132A) so that the second positive electrode busbar (132A) forms the anode of the second direct current power supply unit (22), and the cathodes of the corresponding second direct current distribution units in the direct current power supply modules (11) are connected in parallel with the corresponding second negative electrode busbar (132B) so that the second negative electrode busbar (132B) forms the cathode of the second direct current power supply unit (22).

7. A direct current supply assembly according to claim 6, characterized in that the direct current supply module (11) further comprises a battery pack (111); the first direct current power distribution unit comprises N first DC/DC converters (1121), and the second direct current power distribution unit comprises M second DC/DC converters (1131); the input end of each first DC/DC converter (1121) and the input end of each second DC/DC converter (1131) are connected to the battery pack (111), and the output end is provided with a positive electrode and a negative electrode;

Wherein N and M are positive integers;

The bus module comprises N first positive electrode bus bars (131A) and N first negative electrode bus bars (131B) corresponding to the first direct current power distribution units, and M second positive electrode bus bars (132A) and M second negative electrode bus bars (132B) corresponding to the second direct current power distribution units; the output end of a corresponding first DC/DC converter (1121) in each DC power supply module (11) is connected in parallel with a corresponding first positive electrode busbar (131A) and a corresponding first negative electrode busbar (131B); the output end of the corresponding second DC/DC converter (1131) in each DC power supply module (11) is connected in parallel with the corresponding second positive electrode busbar (132A) and second negative electrode busbar (132B);

the series-parallel switching module (30) comprises a fourth switching unit for realizing the series connection of the first DC/DC converters (1121) and a fifth switching unit for realizing the parallel connection of the first DC/DC converters (1121) when N is larger than 1, and comprises a seventh switching unit for realizing the series connection of the second DC/DC converters (1131) and an eighth switching unit for realizing the parallel connection of the second DC/DC converters (1131) when M is larger than 1.

8. A power supply system, characterized by comprising a plurality of direct current power supply components and current transformation devices according to any one of claims 3-5, wherein the positive output ends of the direct current power supply devices (10) are connected in parallel to form a total positive output end, the negative output ends of the direct current power supply devices (10) are connected in parallel to form a total negative output end, and the neutral output ends of the direct current power supply devices (10) are connected in parallel to form a total neutral output end; the current transformation device is a first current transformation device or a second current transformation device electrically coupled with each direct current power supply assembly, wherein the first current transformation device comprises a neutral potential point; the second deflector does not comprise a neutral potential point.

9. A power supply system comprising the dc power supply assembly of claim 6 or 7 and a current transformer, the current transformer being a first current transformer or a second current transformer electrically coupled to the dc power supply assembly, wherein the first current transformer comprises a neutral potential point; the second deflector does not comprise a neutral potential point.

10. A power supply system according to claim 8 or 9, further comprising a controller (40) and a trigger (50); the series-parallel connection switching module (30) is an electric control module; the trigger (50) is provided with an operation end, and the operation end sends a first signal, a second signal or a third signal to the controller (40) when being operated; the controller (40) is adapted to control the series-parallel switching module (30) to connect the first direct current power supply unit (21) and the second direct current power supply unit (22) in series when receiving the first signal; the controller (40) is adapted to receive a second signal to control the series-parallel switching module (30) to connect the first direct current power supply unit (21) and the second direct current power supply unit (22) in parallel; the controller (40) is adapted to receive a third signal to control the first direct current power supply unit (21) and the second direct current power supply unit (22) to be connected in series and the neutral switch (S0) to be closed.