CN214626472U - Charging module - Google Patents

Charging module Download PDF

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Publication number
CN214626472U
CN214626472U CN202121228487.0U CN202121228487U CN214626472U CN 214626472 U CN214626472 U CN 214626472U CN 202121228487 U CN202121228487 U CN 202121228487U CN 214626472 U CN214626472 U CN 214626472U
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power supply
module
contact
diode
supply module
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CN202121228487.0U
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Chinese (zh)
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傅作超
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Xi'an Xingyuan Borui New Energy Technology Co ltd
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Xi'an Xingyuan Borui New Energy Technology Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/80—Technologies aiming to reduce greenhouse gasses emissions common to all road transportation technologies
    • Y02T10/92—Energy efficient charging or discharging systems for batteries, ultracapacitors, supercapacitors or double-layer capacitors specially adapted for vehicles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02T90/10—Technologies relating to charging of electric vehicles
    • Y02T90/14—Plug-in electric vehicles

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  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Direct Current Feeding And Distribution (AREA)

Abstract

The utility model provides a module of charging relates to power electronic technology field. This module of charging includes: the power supply comprises a plurality of power supply modules, at least one control switch and a plurality of diodes which are in one-to-one correspondence with the plurality of power supply modules; the positive electrodes of the diodes are respectively connected with the corresponding power supply modules; the negative electrode of each diode is respectively used for connecting a load; two ends of each control switch are respectively connected with two adjacent power modules. Use the embodiment of the utility model provides a, can reduce the loss of the module of charging in the charging process.

Description

Charging module
Technical Field
The application relates to the technical field of power electronics, in particular to a charging module.
Background
With the rapid development of electric devices (such as electric vehicles), the output voltage range of the charging module is required to be wider and wider, and in order to meet the charging requirements of batteries in various electric devices, the series-parallel circuit of the charging module is widely applied.
Currently, the charging module may include a power module a, a power module B, a series-parallel switching circuit and a reverse-filling diode D3, wherein the series-parallel switching circuit mainly includes a transistor k1, a diode D1 connected in series between a negative output of the power module a and a negative input of the load, and a diode D2 connected in series between a positive output of the power module B and a positive input of the load, the reverse-filling prevention diode D3 is connected in series on an output combining bus of the series-parallel switching circuit, and the reverse-filling prevention diode D3 is mainly used for preventing damage to the load (such as a battery) when the output of the power module a or B is short-circuited.
However, when the load has a low-voltage and high-current charging demand for the charging module, the number of the anti-reverse-flow diodes D3 is increased, which increases the loss of the charging module during the charging process.
SUMMERY OF THE UTILITY MODEL
An object of the present application is to provide a charging module, which can reduce the loss of the charging module in the charging process, in view of the above-mentioned deficiencies in the prior art.
In order to achieve the above purpose, the technical solutions adopted in the embodiments of the present application are as follows:
the embodiment of the application provides a charging module, the charging module includes: the power supply comprises a plurality of power supply modules, at least one control switch and a plurality of diodes which are in one-to-one correspondence with the power supply modules;
the positive electrodes of the diodes are respectively connected with the corresponding power supply modules;
the negative electrode of each diode is respectively used for connecting a load;
two ends of each control switch are respectively connected with two adjacent power modules.
Optionally, the charging module further includes: a plurality of capacitors in one-to-one correspondence with the plurality of power modules;
and two ends of each capacitor are respectively connected with the positive output end and the negative output end of the corresponding power module.
Optionally, the control switch comprises: the single control switch comprises a first contact, a second contact and a third contact;
the first contact is connected with the negative output end of the first power supply module and a capacitor corresponding to the first power supply module, the second contact is connected with the positive output end of the second power supply module and one end of the capacitor corresponding to the second power supply module, and the third contact is connected with the negative output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module;
the first power supply module and the second power supply module are two adjacent power supply modules connected with the single control switch.
Optionally, the positive electrode of each diode is connected to the positive electrode output end of the corresponding power module.
Optionally, the control switch comprises: a double control switch;
the double-control switch comprises a plurality of contacts which are respectively connected with the positive output end and the negative output end of two adjacent power modules.
Optionally, the dual-control switch includes: a double-pole double-throw relay, the double-pole double-throw relay comprising: a fourth contact, a fifth contact, a sixth contact, a seventh contact, an eighth contact, and a ninth contact;
the fourth contact is connected with the anode output end of the second power supply module and one end of a capacitor corresponding to the second power supply module, the fifth contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, the sixth contact is connected with the anode of the first power supply module through a diode corresponding to the second power supply module, the seventh contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, the eighth contact is connected with the cathode output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module, and the ninth contact is suspended;
the first power supply module and the second power supply module are two adjacent power supply modules connected with the double-pole double-throw relay.
Optionally, the dual-control switch includes: single-pole double-throw relay and single-pole single-throw relay;
the single-pole double-throw relay includes: the power supply comprises a tenth contact, an eleventh contact and a twelfth contact, wherein the tenth contact is connected with the anode output end of the second power supply module and one end of a capacitor corresponding to the second power supply module, the eleventh contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, and the twelfth contact is connected with the anode of the first power supply module through a diode corresponding to the second power supply module;
the single-pole single-throw relay includes: the thirteenth contact is connected with the negative output end of the first power supply module and the capacitor corresponding to the first power supply module, and the fourteenth contact is connected with the negative output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module;
the first power supply module and the second power supply module are two adjacent power supply modules connected with a switch formed by the single-pole double-throw relay and the single-pole single-throw relay.
Optionally, the positive electrode of the diode corresponding to the primary power module is connected to the positive output end of the primary power module, and the positive electrode of the diode corresponding to the secondary power module is connected to the positive output end of the secondary power module via the dual-control switch.
Optionally, the power module comprises: a secondary side and a rectifying unit;
and the rectifying unit is respectively connected with the secondary side and the capacitor corresponding to the power module.
Optionally, the rectifying unit includes: the diode comprises a first diode, a second diode, a third diode and a fourth diode;
one end of the secondary side is connected with the anode of the first diode and the cathode of the second diode respectively, and the other end of the secondary side is connected with the anode of the third diode and the cathode of the fourth diode respectively;
a node where the cathode of the first diode is intersected with the cathode of the third diode is connected with one end of the capacitor corresponding to the power module;
and a node of the intersection of the anode of the second diode and the anode of the fourth diode is connected with the other end of the capacitor corresponding to the power module.
The beneficial effect of this application is:
the embodiment of the application provides a charging module, and the charging module includes: the power supply comprises a plurality of power supply modules, at least one control switch and a plurality of diodes which are in one-to-one correspondence with the plurality of power supply modules; the positive electrodes of the diodes are respectively connected with the corresponding power supply modules; the negative electrode of each diode is respectively used for connecting a load; two ends of each control switch are respectively connected with two adjacent power modules. By adopting the charging module provided by the embodiment of the application, all devices in the charging module are connected according to the connection mode described above, and based on this, the diode corresponding to each power module can be used as an anti-reverse-filling diode, so that the extra anti-reverse-filling diode is prevented from being connected in series on the output combining bus of the series-parallel switching circuit, and the loss of the charging module in the charging process can be reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
Fig. 1 is a schematic structural diagram of a charging module according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a charging module provided in an embodiment of the present application, wherein the charging module includes two power modules;
fig. 3 is a schematic flow diagram of current when a power module a and a power module B are in a parallel relationship according to an embodiment of the present disclosure;
fig. 4 is a schematic flow diagram of current when a power module a and a power module B are connected in series according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a charging module provided in an embodiment of the present application, wherein the charging module includes more than two power modules;
fig. 6 is a schematic structural diagram of another charging module according to an embodiment of the present disclosure, wherein the charging module includes two power modules;
fig. 7 is a schematic structural diagram of another charging module according to an embodiment of the present disclosure, wherein the charging module includes more than two power modules;
fig. 8 is a schematic structural diagram of a power module according to an embodiment of the present disclosure;
fig. 9 is a schematic structural diagram of another power module according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. 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 application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it is further noted that, unless expressly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a charging module according to an embodiment of the present disclosure. As shown in fig. 1, the charging module 100 is configured to provide electric energy to a chargeable load 200, the load 200 may specifically be a power battery on an electric vehicle, the form of the electric vehicle may include a small-sized electric logistics vehicle, a household electric passenger vehicle, a large-sized electric bus, and the like, the charging module 100 may specifically be disposed in a charging pile, and may of course be disposed in any device that provides electric energy to the load 200, which is not limited in this application.
The charging module 100 may include a plurality of power modules (e.g., power module a101, power module B102 …, power module N103), at least one control switch (first control switch 104 … -th (N-1) control switch 106), and a plurality of diodes (first diode 107, second diode 108 … -th diode 109) in one-to-one correspondence with the plurality of power modules; the positive electrodes of the diodes are respectively connected with the corresponding power supply modules; the negative electrode of each diode is respectively used for connecting a load; two ends of each control switch are respectively connected with two adjacent power modules.
The connection relationship between the control switches and the diodes corresponding to the power modules can form a series-parallel switching circuit 300, the series-parallel switching circuit 300 can enable the power modules to form a parallel and/or series relationship under the action of the control switches, and the power modules provide electric energy meeting the charging requirement for the load under the condition of parallel and/or series connection.
Each power module in the charging module 100 may be a dc power module, the number of power modules and the number of control switches have the following relationship, one control switch is connected between every two adjacent power modules, that is, the number of control switches is one less than the number of power modules, and when the number of power modules is N, the number of control switches is (N-1); the number of power modules and the number of diodes have the following relationship, and when the number of power modules is N, the number of diodes is also N.
For example, a series-parallel switching circuit formed between the power module a101 and the power module B102 in fig. 1 is taken as an example, and when there are more than two power modules in the charging module 100, reference may be made to the description herein. The connection relationship among the power module a101, the power module B102, the first control switch 104, the first diode 107, and the second diode 108 is expressed as follows: the power module a101 is connected to the power module B102 through the first control switch 104, the power module a101 and the anode of the first diode 107 can be directly connected by a wire, the physical connection relationship between the power module B102 and the anode of the second diode 108 can be set according to the type of the first control switch 104, the type of the first control switch 104 is different, and the physical connection relationship between the power module B102 and the anode of the second diode 108 can be made as follows, one is that the power module B102 and the anode of the second diode 108 are directly connected by a wire (in fig. 1), the other is that the power module B102 and the anode of the second diode 108 are indirectly connected or not connected by the first control switch 104, and certainly, other connection relationships can be included, which is not limited in the present application.
Taking the connection relationship shown in fig. 1 as an example, the positive electrodes of the power module a101 and the first diode 107 can be directly connected by a wire, the positive electrodes of the power module B102 and the second diode 2108 can be directly connected by a wire, and the node where the negative electrode of the first diode 107 and the negative electrode of the second diode 108 are connected in parallel is connected to the load 200. Fig. 1 is a circuit diagram showing connection of the devices in the charging module in a higher-order form, and is not shown as an actual physical connection relationship.
For the sake of brief description, the power module a is referred to as a power module a101, the power module B is referred to as a power module B102, and the like.
On the premise of the connection relationship of the above devices, when the power module a and the power module B are in parallel, the power module a, the first diode, the load 200, and the first control switch form a loop, and the power module B, the second diode, and the load 200 form a loop. The first diode and the second diode have one-way conductivity, so that the first diode and the second diode play a role in preventing reverse-flow current and can be used as reverse-flow prevention diodes. The first diode and the second diode can be used for preventing the load 200 from being damaged when the outputs of the power supply module A and the power supply module B are short-circuited; the first diode and the second diode can also avoid the damage of reverse current to the first control switch, and when the power module A is short-circuited, the first diode can also avoid influencing the normal output of the power module B, and when the power module B is short-circuited, the first diode can also avoid influencing the normal output of the power module A.
When the power module a and the power module B are connected in series, the first diode, the first control switch and the load 200 form a loop. The first diode has one-way conductivity, so that the first diode plays a role in preventing reverse-flow current and can be used as a reverse-flow prevention diode. The first diode can be used to prevent the load 200 from being damaged when the outputs of the power modules a and B are short-circuited, and can also prevent the first control switch from being damaged by the reverse-flow current.
With the charging module shown in fig. 1, the charging module includes: the power supply comprises a plurality of power supply modules, at least one control switch and a plurality of diodes which are in one-to-one correspondence with the plurality of power supply modules; the positive electrodes of the diodes are respectively connected with the corresponding power supply modules; the negative electrode of each diode is respectively used for connecting a load; two ends of each control switch are respectively connected with two adjacent power modules. By adopting the charging module provided by the embodiment of the application, all devices in the charging module are connected according to the connection mode described above, and based on this, the diode corresponding to each power module can be used as an anti-reverse-filling diode, so that the phenomenon that an extra anti-reverse-filling diode is connected in series on the output combining bus of the series-parallel switching circuit is avoided, and the loss of the charging module in the charging process can be reduced.
Optionally, the charging module further comprises: a plurality of capacitors in one-to-one correspondence with the plurality of power modules; and two ends of each capacitor are respectively connected with the positive output end and the negative output end of the corresponding power module.
The capacitor mentioned here is taken as an external device of the power module, and of course, the capacitor may also be taken as an internal device of the power module, and the application does not limit the capacitor. The capacitor mainly plays a role of filtering, and electric energy supplied to the load can be more stable.
Optionally, when the control switch is a single-control switch, the connection manner of the single-control switch and other devices in the charging module may be described as follows:
the single control switch comprises a first contact A, a second contact B and a third contact C, wherein the first contact A, the negative output end of the first power supply module and a capacitor C corresponding to the first power supply moduleiThe second contact B is connected with the anode output end of the second power supply module and the capacitor C corresponding to the second power supply modulei+1Is connected with the negative output end of the second power supply module and the capacitor C corresponding to the second power supply modulei+1The other end of the first and second connecting rods is connected; the first power supply module and the second power supply module are two adjacent power supply modules connected with the single control switch.
The single-control switch can be called a single-pole double-throw relay, a first contact A of the single-pole double-throw relay is a fixed point, and after the single-pole double-throw relay receives a control signal, the first contact A is attracted with a second contact B or the first contact A is attracted with a third contact C.
Fig. 2 is a schematic structural diagram of a charging module provided in an embodiment of the present application, wherein the charging module includes two power modules. As shown in fig. 2, the charging module includes a power module a and a power module B, where the power module a and the power module B are two adjacent power modules, and are equivalent to the aforementioned first power module and the second power module, and the positive output end of the power module a is respectively connected to the positive electrode of the corresponding diode D1 (first diode) and the corresponding capacitor C1Is connected with the negative electrode output end of the power supply module A and the corresponding capacitor C1And the other end of the relay is connected with a single-pole double-throw relay S1A first contact a connection of (a first control switch); of power supply module BThe positive output end is respectively connected with a single-pole double-throw relay S1Second contact B of (2) and its corresponding diode D2(second diode) anode connection and its corresponding capacitor C2Is connected with the negative electrode output end of the power supply module B and the corresponding capacitor C2And the other end of the relay is connected with a single-pole double-throw relay S1To the third contact C; diode D corresponding to power module A1And a diode D corresponding to the power module B2The node M of the negative electrode intersection is connected with the positive electrode input end of the load 200, and the negative electrode output end of the power supply module B is connected with the negative electrode input end of the load 200.
When the connection relationship between the devices in the charging module is as described above, the single-pole double-throw relay S1Based on the parallel control instruction, the first contact A and the third contact C can be attracted, as can be seen from fig. 2, the negative output end of the power module A is connected with the negative output end of the power module B, and the positive output end of the power module A and the positive output end of the power module B are connected through the diode D1Diode D2Connected together, based thereon, power module a is in a parallel relationship with power module B. It can be seen that the diode D1Diode D2The power supply module A and the power supply module B can be used for preventing the load 200 from being damaged when the output of the power supply module A and the output of the power supply module B are short-circuited; diode D1Diode D2Can also avoid reverse current flowing to the single-pole double-throw relay S1Damage of (2); when the power supply module A is short-circuited, the diode D1The normal output of the power supply module B can be prevented from being influenced, and when the power supply module B is short-circuited, the diode D2And the influence on the normal output of the power supply module A can be avoided.
Fig. 3 is a schematic flow diagram of current when a power module a and a power module B are in a parallel relationship according to an embodiment of the present disclosure. As shown in fig. 3, solid arrows indicate the current flowing direction of the branch corresponding to the power module a, and dotted arrows indicate the current flowing direction of the branch corresponding to the power module B. The current corresponding to the power module A is IAVoltage of V1The current corresponding to the power module B is IBVoltage of V2The total output of the charging module 100Voltage is UOUTThe total current at the output end of the charging module is IOUT。
Single-pole double-throw relay S1Based on the series control instruction, the first contact A and the second contact B can be attracted, and as can be seen from fig. 2, when the first contact A and the second contact B are attracted, the negative output end of the power module A is connected with the positive output end of the power module B, based on which, the power module A and the power module B are in series connection, in the series circuit, the diode D1Can be used for preventing damage to the load 200 when the outputs of the power supply modules A and B are short-circuited, and the diode D1The damage of the first control switch by the back-flowing current can be avoided.
Fig. 4 is a schematic flow diagram of current when a power module a and a power module B are connected in series according to an embodiment of the present disclosure. As shown in fig. 4, the dashed arrows indicate the current flow direction of the series circuit.
Based on fig. 3 and 4, the total current I at the output of the charging module is based on the parallel circuit principleOUTIs equal to (I)A+IB) According to the principle of series circuit, the total voltage U at the output of the charging moduleOUTIs equal to (V)1+V2)。
Fig. 5 is a schematic structural diagram of a charging module having more than two power modules according to an embodiment of the present disclosure. As shown in fig. 5, the charging module includes a power module a and a power module B …, and the capacitors corresponding to the power modules can be respectively used as C1、C2…CNShowing that the diodes corresponding to each power module can be respectively used as D1、D2…DNShowing that the single control switch (single-pole double-throw relay) between two adjacent power supply modules can be respectively S1、S2…SN-1And (4) showing. Any two adjacent power modules may be referred to as the first power module and the second power module.
Describing the connection relationship of each device by the angle of two adjacent power modules in the charging module, reference may be made to the description in fig. 2, which is not repeated herein; describing each device with respect to the whole charging moduleThen, as can be seen from fig. 5, the positive output terminal of the power module a is connected to the positive input terminal of the load 200, the negative output terminal of the power module N is connected to the negative input terminal of the load 200, and the cathodes of the diodes connected to the positive output terminals of the middle power modules are respectively connected to the diode D corresponding to the power module a1Is connected to the negative electrode of (1).
It should be noted that, in fig. 5, the control commands received by the single control switches may be identical or not, and the present application does not limit the control commands. Here, the explanation will be given taking an example in which the single control switches (single pole double throw relays) receive the same control command.
Suppose that each single pole double throw relay (S)1、S2…SN-1)All receive the parallelly connected control command, each single-pole double throw relay can respectively with first contact A and third contact C actuation, can see from figure 5 that the negative pole output of power module A is connected with power module N's negative pole output, power module B's negative pole output is connected with power module N's negative pole output, power module C's negative pole output is connected with power module N's negative pole output, analogizes with this. The positive output end of the power module A and the positive output end of the positive electrode output end … of the power module B are connected with the diode D1Diode D2… diode DNConnected together so that power module a and power module B … are in a parallel relationship with power module N. Reference is made to the above description for the diodes (D)1、D2…DN) Both can be used for preventing the load 200 from being damaged when the outputs of the power supply module A and the power supply module B … are short-circuited; each diode (D)1、D2…DN) Can also avoid reverse current to each single-pole double-throw relay (S)1、S2…SN-1)And, when the power module a is short-circuited, the diode D1The normal output of other power supply modules (power supply module B … power supply module N) can be prevented from being influenced, and when the power supply module B is short-circuited, the diode D2And the normal output of other power supply modules (power supply module A … power supply module N) can be prevented from being influenced, and the like. The current flow direction when the power modules are connected in parallelThe schematic diagram can refer to fig. 3.
Suppose that each single pole double throw relay (S)1、S2…SN-1) All receive the series control instruction, each single-pole double-throw relay can respectively with first contact A and second contact B actuation, can see from figure 5 that the negative pole output of power module A is connected with the anodal output of power module B, the negative pole output of power module B is connected with the anodal output of power module C, analogize to this, and then power module A, power module B … power module N are in the series relation. In a series circuit, diode D can be referred to as described above1Can be used for preventing damage to the load 200 when the outputs of the power supply modules A and B … are short-circuited, and the diode D1Can also avoid reverse current to each single-pole double-throw relay (S)1、S2…SN-1) Is damaged. Referring to fig. 4, a schematic diagram of the current flow when the power modules are connected in series is shown.
Wherein, the current corresponding to the power module A is assumed to be IAVoltage of V1The current corresponding to the power module B is IBVoltage of V2… the power supply module N corresponds to a current INVoltage of VNThen the total current I at the output of the charging module is based on the parallel circuit principleOUTIs equal to (I)A+IB+…+IN) According to the principle of series circuit, the total voltage U at the output of the charging moduleOUTIs equal to (V)1+V2+…+VN)。
It can be seen that, no matter how many the number of the power modules in the charging module, as long as the devices in the charging module are connected into the series-parallel switching circuit according to the connection manner described above, the diodes in the series-parallel switching circuit can play a role of preventing reverse filling, and the phenomenon of connecting the reverse filling prevention diodes in series on the total output line of the charging module is avoided, so that the total number of the diodes in the circuit loop can be reduced, further the loss of the charging module in the charging process is reduced, and the series-parallel relationship between the power modules is realized by controlling the switching of the single control switch by the control signal, so that the series-parallel switching efficiency can be improved.
Optionally, the control switch may include a dual control switch, and the dual control switch may include a plurality of contacts, which may be respectively connected to the positive output terminal and the negative output terminal of two adjacent power modules. When the double-control switch is a double-pole double-throw relay, the connection mode of the double-pole double-throw relay and other devices can be described as follows:
the double-pole double-throw relay can comprise a fourth contact A ', a fifth contact B', a sixth contact C ', a seventh contact D, an eighth contact E and a ninth contact F, wherein the fourth contact A' is connected with the positive output end of a second power module and one end of a capacitor corresponding to the second power module, the fifth contact B 'is connected with the negative output end of a first power module and the capacitor corresponding to the first power module, the sixth contact C' is connected with the positive electrode of the first power module through a diode corresponding to the second power module, the seventh contact D is connected with the negative output end of the first power module and the capacitor corresponding to the first power module, the eighth contact E is connected with the negative output end of the second power module and the other end of the capacitor corresponding to the second power module, and the ninth contact F is suspended; the first power supply module and the second power supply module are two adjacent power supply modules connected with the double-pole double-throw relay.
The fourth contact A 'and the seventh contact D of the double-pole double-throw relay are respectively fixed points, and after the double-pole double-throw relay receives a control signal, the fourth contact A' is attracted with the sixth contact C and the seventh contact D is attracted with the eighth contact E, or the fourth contact A 'is attracted with the fifth contact B' and the seventh contact D is attracted with the ninth contact F.
Fig. 6 is a schematic structural diagram of another charging module provided in this embodiment of the present application, where the charging module includes two power modules. As shown in fig. 6, the charging module includes a power module a and a power module B, where the power module a and the power module B are two adjacent power modules, and are equivalent to the aforementioned first power module and the second power module, and the positive output end of the power module a is respectively corresponding to the corresponding diode D1And a capacitor C corresponding thereto1Is connected with the negative electrode output end of the power supply module A and is respectively paired with the negative electrode output end of the power supply module ACorresponding capacitance C1Another end of the switch K is connected with a double-pole double-throw switch1The fifth contact B' and the seventh contact D are connected; the positive electrode output end of the power module B is respectively connected with the double-pole double-throw switch K1And its corresponding capacitor C2Is connected with the negative electrode output end of the power supply module B and the corresponding capacitor C2Is connected at the other end and a double-pole double-throw relay K1To the eighth contact E; double-pole double-throw relay K1The ninth contact F is suspended; double-pole double-throw relay K1And the sixth contact C' of the diode D corresponds to the power module B2Is connected with the anode of the diode D corresponding to the power module B2Diode D with negative pole corresponding to power module A1The node G of the negative electrode intersection is connected with the positive electrode input end of the load 200, and the negative electrode output end of the power supply module B is connected with the negative electrode input end of the load 200.
When the connection relationship between the devices in the charging module is as described above, the double-pole double-throw relay K1Based on the parallel control instruction, the fourth contact a 'and the sixth contact C' can be attracted, and the seventh contact D and the eighth contact E can be attracted, as can be seen from fig. 6, the negative output end of the power module a is connected with the negative output end of the power module B, and the positive output end of the power module a and the positive output end of the power module B are connected through the diode D1Diode D2Connected together, based thereon, power module a is in a parallel relationship with power module B. It can be seen that the diode D1Diode D2The power supply module A and the power supply module B can be used for preventing the load 200 from being damaged when the output of the power supply module A and the output of the power supply module B are short-circuited; diode D1Diode D2Can also avoid reverse current flowing to the single-pole double-throw relay S1Damage of (2); when the power supply module A is short-circuited, the diode D1The normal output of the power supply module B can be prevented from being influenced, and when the power supply module B is short-circuited, the diode D2And the influence on the normal output of the power supply module A can be avoided.
Double-pole double-throw relay K1Based on the series control command, the fourth contact A 'and the fifth contact B' can be attracted, and the seventh contact D and the ninth contact F can be attracted, as shown in FIG. 6So that the negative output of the power supply module A is connected to the positive output of the power supply module B, on the basis of which the power supply module A and the power supply module B are in a series connection, in a series circuit, a diode D1Can be used for preventing damage to the load 200 when the outputs of the power supply modules A and B are short-circuited, and the diode D1The damage of the first control switch by the back-flowing current can be avoided.
Continuing with the above example, reference is made to fig. 3 and 4 for the flow direction of the current when the power module a and the power module B are in series-parallel relationship. The total current I at the output of the charging module can be based on the parallel circuit principleOUTIs equal to (I)A+IB) According to the principle of series circuit, the total voltage U at the output of the charging moduleOUTIs equal to (V)1+V2)。
Fig. 7 is a schematic structural diagram of another charging module according to an embodiment of the present disclosure, wherein the charging module includes more than two power modules. As shown in fig. 7, the charging module includes a power module a and a power module B …, and the capacitors corresponding to the power modules can be respectively used as C1、C2…CNShowing that the diodes corresponding to each power module can be respectively used as D1、D2…DNShowing that the double-pole double-throw relay between two adjacent power modules can be respectively used with K1、K2…KN-1And (4) showing. Any two adjacent power modules may be referred to as the first power module and the second power module.
Describing the connection relationship of each device by the angle of two adjacent power modules in the charging module, which can refer to the content in the description of fig. 6 and is not repeated herein; the connection relationship of the devices is described with the overall charging module as an angle, so that it can be seen from fig. 7 that the positive output end of the power module a is connected with the positive input end of the load 200, the negative output end of the power module N is connected with the negative input end of the load 200, and the cathodes of the diodes connected to the sixth contact C of the double-pole double-throw relays are respectively connected with the diode D corresponding to the power module a1That is, the diode D corresponding to the first power module (power module a) in the charging module1The anode of the secondary power supply module is connected with the anode output end of the secondary power supply module through a double-pole double-throw relay.
It should be noted that, in fig. 7, the control commands received by the double-pole double-throw relays may be identical or not, and the present application does not limit the control commands. Here, the explanation will be given taking an example in which each double pole double throw relay receives the same control command.
Suppose each double pole double throw relay (K)1、K2…KN-1) All receive the parallelly connected control command, each double-pole double-throw relay can respectively with fourth contact A ' with sixth contact C ' actuation and seventh contact D with eighth contact E actuation, can see from figure 7 that the negative pole output of power module A is connected with power module N's negative pole output, power module B's negative pole output is connected with power module N's negative pole output, power module C's negative pole output is connected with power module N's negative pole output, analogize with this. Referring to the description above with respect to FIG. 5, power module A, power module B …, and power module N are in parallel relationship, with diodes (D)1、D2…DN) Both can be used for preventing the load 200 from being damaged when the outputs of the power supply module A and the power supply module B … are short-circuited; each diode (D)1、D2…DN) Can also avoid reverse current to each single-pole double-throw relay (S)1、S2…SN-1)And, when the power module a is short-circuited, the diode D1The normal output of other power supply modules (power supply module B … power supply module N) can be prevented from being influenced, and when the power supply module B is short-circuited, the diode D2And the normal output of other power supply modules (power supply module A … power supply module N) can be prevented from being influenced, and the like.
Suppose each double pole double throw relay (K)1、K2…KN-1) All receive the series control instruction, each double-pole double-throw relay can respectively attract the fourth contact A 'and the fifth contact B' and the seventh contact D and the ninth contact, as can be seen from figure 7, the negative output end of the power module A and the electricityThe positive output end of the source module B is connected, the negative output end of the power module B is connected with the positive output end of the power module C, and so on, and the power module A and the power module B … are in series connection. In a series circuit, diode D, as described in part with reference to FIG. 5 above1Can be used for preventing damage to the load 200 when the outputs of the power supply modules A and B … are short-circuited, and the diode D1Can also avoid reverse current to each double-pole double-throw relay (K)1、K2…KN-1) Is damaged.
Continuing with the above example, the total current I at the output of the charging module is based on the parallel circuit principleOUTIs equal to (I)A+IB+…+IN) According to the principle of series circuit, the total voltage U at the output of the charging moduleOUTIs equal to (V)1+V2+…+VN)。
Optionally, when the double-control switch is a switch composed of a single-pole double-throw relay and a single-pole single-throw relay, the connection mode of the switch composed of the single-pole double-throw relay and the single-pole single-throw relay and other devices may be described as follows:
this single-pole double-throw relay includes: the power supply comprises a tenth contact, an eleventh contact and a twelfth contact, wherein the tenth contact is connected with the anode output end of the second power supply module and one end of a capacitor corresponding to the second power supply module, the eleventh contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, and the twelfth contact is connected with the anode of the first power supply module through a diode corresponding to the second power supply module;
this single-pole single-throw relay includes: the power supply module comprises a thirteenth contact and a fourteenth contact, wherein the thirteenth contact is connected with the negative output end of the first power supply module and the capacitor corresponding to the first power supply module, and the fourteenth contact is connected with the negative output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module; the first power supply module and the second power supply module are two adjacent power supply modules which are connected with a switch formed by the single-pole double-throw relay and the single-pole single-throw relay.
It should be noted that, the ninth contact F of the double-pole double-throw relay is floating, so even though the seventh contact D is attracted to the ninth contact F, the negative output terminal of the first power module is not connected to the negative output terminal of the second power module, that is, the aforementioned double-pole double-throw relay is equivalent to a single-pole double-throw relay and a single-pole single-throw relay, and the connection relationship between the switch formed by the single-pole double-throw relay and the single-pole single-throw relay and other devices in the charging module can refer to the description of the parts in fig. 6 and fig. 7, which is not described herein again.
It can be seen that, no matter the type of the control switch is a single-pole double-throw relay, a double-pole double-throw relay, or a switch composed of a single-pole double-throw relay and a single-pole single-throw relay, as long as the devices in the charging module are connected into the series-parallel switching circuit according to the connection mode described above, the diodes in the series-parallel switching circuit can play a role in preventing reverse charging.
Optionally, the power module may include: a secondary side and a rectifying unit; the rectifying unit is respectively connected with the secondary side and the capacitor corresponding to the power module.
Each power module in the charging module can be an independent direct-current power module, a module formed by a transformer after passing through a rectifying unit, and power modules in other forms, and the application does not limit the power modules.
Fig. 8 is a schematic structural diagram of a power module according to an embodiment of the present application. As shown in fig. 8, there may be multiple secondary sides of the same transformer, that is, two secondary sides share a primary side, and each secondary side and the rectifying unit may form a power module, and here, taking the case where the same transformer has two secondary sides as an example, each secondary side (secondary side 1 and secondary side 2) forms a power module a and a power module B.
Wherein the first rectifying unit 600 may include a third diode D11, a fourth diode D12, a fifth diode D13, and a sixth diode D14; one end of the secondary side 1 is connected to the anode of the third diode D11 and the cathode of the fourth diode D12 in the rectifying unit 600, respectively, and the other end of the secondary side 1 is connected to the cathode of the fourth diode D12The anode of the fifth diode D13 and the cathode of the sixth diode D14 in the rectifying unit 600 are connected; the node where the cathode of the third diode D11 and the cathode of the fifth diode D13 intersect with each other is connected with the capacitor C corresponding to the power module A1Is connected with one end of the connecting rod; the node of the intersection of the anode of the fourth diode D12 and the anode of the sixth diode D14 is connected with the capacitor C corresponding to the power module A1One end of which is connected.
Wherein, the second rectifying unit 601 may include a seventh diode D21, an eighth diode D22, a ninth diode D23, a twelfth diode D24; one end of the secondary side 2 is connected to the anode of the seventh diode D21 and the cathode of the eighth diode D22 in the second rectifying unit 601, respectively, and the other end of the secondary side 2 is connected to the anode of the ninth diode D23 and the cathode of the twelfth diode D24 in the second rectifying unit 601, respectively; the node where the cathode of the seventh diode D21 and the cathode of the ninth diode D23 intersect is connected with the capacitor C corresponding to the power module B2Is connected with one end of the connecting rod; the node where the anode of the eighth diode D22 and the anode of the twelfth diode D24 intersect is connected to the capacitor C corresponding to the power module B2One end of which is connected.
Fig. 9 is a schematic structural diagram of another power module according to an embodiment of the present application. As shown in fig. 9, each transformer has only one secondary side, primary side 1 corresponding to secondary side 1, and primary side 2 corresponding to secondary side 2. The connection relationship between the secondary sides and the diodes in the rectifying units can be referred to the above description, and will not be described here.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (10)

1. A charging module, comprising: the power supply comprises a plurality of power supply modules, at least one control switch and a plurality of diodes which are in one-to-one correspondence with the power supply modules;
the positive electrodes of the diodes are respectively connected with the corresponding power supply modules;
the negative electrode of each diode is respectively used for connecting a load;
two ends of each control switch are respectively connected with two adjacent power modules.
2. The charging module of claim 1, further comprising: a plurality of capacitors in one-to-one correspondence with the plurality of power modules;
and two ends of each capacitor are respectively connected with the positive output end and the negative output end of the corresponding power module.
3. The charging module of claim 2, wherein the control switch comprises: the single control switch comprises a first contact, a second contact and a third contact;
the first contact is connected with the negative output end of the first power supply module and a capacitor corresponding to the first power supply module, the second contact is connected with the positive output end of the second power supply module and one end of the capacitor corresponding to the second power supply module, and the third contact is connected with the negative output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module;
the first power supply module and the second power supply module are two adjacent power supply modules connected with the single control switch.
4. The charging module of claim 3, wherein the anodes of the diodes are respectively connected to the anode output terminal of the corresponding power module.
5. The charging module of claim 2, wherein the control switch comprises: a double control switch;
the double-control switch comprises a plurality of contacts which are respectively connected with the positive output end and the negative output end of two adjacent power modules.
6. The charging module of claim 5, wherein the on-off switch comprises: a double-pole double-throw relay, the double-pole double-throw relay comprising: a fourth contact, a fifth contact, a sixth contact, a seventh contact, an eighth contact, and a ninth contact;
the fourth contact is connected with the anode output end of the second power supply module and one end of a capacitor corresponding to the second power supply module, the fifth contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, the sixth contact is connected with the anode of the first power supply module through a diode corresponding to the second power supply module, the seventh contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, the eighth contact is connected with the cathode output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module, and the ninth contact is suspended;
the first power supply module and the second power supply module are two adjacent power supply modules connected with the double-pole double-throw relay.
7. The charging module of claim 5, wherein the on-off switch comprises: single-pole double-throw relay and single-pole single-throw relay;
the single-pole double-throw relay includes: the power supply comprises a tenth contact, an eleventh contact and a twelfth contact, wherein the tenth contact is connected with the anode output end of the second power supply module and one end of a capacitor corresponding to the second power supply module, the eleventh contact is connected with the cathode output end of the first power supply module and the capacitor corresponding to the first power supply module, and the twelfth contact is connected with the anode of the first power supply module through a diode corresponding to the second power supply module;
the single-pole single-throw relay includes: the thirteenth contact is connected with the negative output end of the first power supply module and the capacitor corresponding to the first power supply module, and the fourteenth contact is connected with the negative output end of the second power supply module and the other end of the capacitor corresponding to the second power supply module;
the first power supply module and the second power supply module are two adjacent power supply modules connected with a switch formed by the single-pole double-throw relay and the single-pole single-throw relay.
8. The charging module according to any one of claims 5 to 7, wherein the anode of the diode corresponding to the primary power supply module is connected to the anode output terminal of the primary power supply module, and the anode of the diode corresponding to the secondary power supply module is connected to the anode output terminal of the secondary power supply module via the dual-control switch.
9. The charging module of claim 1, wherein the power module comprises: a secondary side and a rectifying unit;
and the rectifying unit is respectively connected with the secondary side and the capacitor corresponding to the power module.
10. The charging module according to claim 9, wherein the rectifying unit includes: the diode comprises a first diode, a second diode, a third diode and a fourth diode;
one end of the secondary side is connected with the anode of the first diode and the cathode of the second diode respectively, and the other end of the secondary side is connected with the anode of the third diode and the cathode of the fourth diode respectively;
a node where the cathode of the first diode is intersected with the cathode of the third diode is connected with one end of the capacitor corresponding to the power module;
and a node of the intersection of the anode of the second diode and the anode of the fourth diode is connected with the other end of the capacitor corresponding to the power module.
CN202121228487.0U 2021-06-02 2021-06-02 Charging module Active CN214626472U (en)

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