Switching circuit for series connection and parallel connection of super capacitors

Abstract

The embodiment of the invention discloses a switching circuit for series connection and parallel connection of super capacitors. The switching circuit comprises a signal receiving end and a switching matrix, the switching matrix comprises a series switching branch and a parallel switching branch which are connected; the signal receiving end is used for receiving a series / parallel drive signal; the signal receiving end is connected with the switching matrix, and the switching matrix is configured to control a corresponding switching branch to work based on the series / parallel driving signal so as to realize switching of series connection and parallel connection of the super capacitor; the method has the beneficial effects that the series switching branch and the parallel switching branch connected in the switching matrix are utilized, and the corresponding switching branch is controlled to work based on the received series / parallel driving signal, so that the switching of series connection and parallel connection of the super capacitor is realized; the whole circuit is simple in structure, and therefore the defects that in the prior art, the structure is complex, additional electronic elements need to be deployed, and the complexity and cost of the scheme are increased are overcome.

Description

Technical Field

[0001] The present invention relates to the technical field of electronic circuits, and in particular to a switching circuit for connecting supercapacitors in series and in parallel. Background Art

[0002] Supercapacitors are often used in situations that require high energy density and fast charging and discharging, such as electric vehicles, energy storage systems, etc. At present, most supercapacitors are connected in series and in parallel to solve the voltage imbalance problem in order to improve charging efficiency and discharge energy.

[0003] However, the series and parallel solutions in the prior art have complex structures and require the deployment of additional electronic components, which increases the complexity and cost of the solutions, thereby affecting the economy and feasibility of supercapacitors in practical applications. Summary of the invention

[0004] In view of the technical defects mentioned in the background technology, an embodiment of the present invention aims to provide a switching circuit for connecting supercapacitors in series and in parallel.

[0005] To achieve the above-mentioned object, an embodiment of the present invention provides a switching circuit for series and parallel connection of supercapacitors, wherein the switching circuit comprises a signal receiving end and a switching matrix; wherein the switching matrix comprises connected series switching branches and parallel switching branches;

[0006] The signal receiving end is used to receive the series / parallel driving signal;

[0007] The signal receiving end is connected to the switching matrix, and the switching matrix is ​​configured as follows:

[0008] Based on the series / parallel driving signal, the corresponding switching branch is controlled to work, so as to realize the switching between series and parallel connection of the supercapacitors.

[0009] As a specific implementation of the present application, the switching matrix includes multiple super capacitors and MOS tubes, and the gate of each MOS tube is connected to a switching device.

[0010] As a specific implementation of the present application, the switching device adopts a diode.

[0011] As a specific implementation of the present application, a corresponding resistor is connected between the gate and source of each MOS tube.

[0012] As a specific implementation of the present application, at the same time, the series drive signal and the parallel drive signal have different level polarities.

[0013] As a specific implementation of the present application, at least one MOS tube is connected between the positive electrode and the negative electrode of adjacent supercapacitors.

[0014] As a specific implementation of the present application, the series switching branches and the parallel switching branches are connected to each other to form a plurality of H-type structures.

[0015] As a preferred implementation of the present application, one end of the resistor is connected to the switch device, and the other end of the resistor is directly grounded or grounded through a MOS tube.

[0016] The technical solution provided by the embodiment of the present invention realizes the switching of the series and parallel connection of the supercapacitors by proposing a switching circuit for switching the series and parallel connection of the supercapacitors, utilizing the series switching branches and the parallel switching branches connected in the switching matrix, and controlling the operation of the corresponding switching branches based on the received series / parallel driving signals; the entire circuit only involves simple supercapacitors and MOS tube devices, and the circuit structure is simple, thereby overcoming the defects of the complex structure existing in the prior art, and the need to deploy additional electronic components, thereby increasing the complexity and cost of the solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation of the present invention or the technical solution in the prior art, the drawings required for use in the specific implementation or the description of the prior art are briefly introduced below.

[0018] Figure 1 It is a circuit principle diagram of a switching circuit for connecting supercapacitors in series and in parallel provided by an embodiment of the present invention;

[0019] Figure 2 is an equivalent circuit of a series mode provided by an embodiment of the present invention;

[0020] Figure 3 is an equivalent circuit of a parallel mode provided by an embodiment of the present invention;

[0021] Figure 4 The present invention provides a circuit connection diagram of a switching circuit in which n supercapacitors are connected in series and in parallel. DETAILED DESCRIPTION

[0022] The specific embodiments of the present invention will be described in detail below. It should be noted that the embodiments described herein are only for illustration and are not intended to limit the present invention. In the following description, a large number of specific details are set forth in order to provide a thorough understanding of the present invention. However, it is apparent to those of ordinary skill in the art that these specific details need not be adopted to implement the present invention.

[0023] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0024] Throughout the specification, references to "one embodiment," "an embodiment," "an example," or "an example" mean that a particular feature, structure, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment of the present invention. Therefore, the phrases "in one embodiment," "in an embodiment," "an example," or "an example" appearing in various places throughout the specification do not necessarily all refer to the same embodiment or example. Furthermore, particular features, structures, or characteristics may be combined in one or more embodiments or examples in any appropriate combinations and / or subcombinations.

[0025] It should be noted that, unless otherwise specified, the technical terms in this embodiment have the common meanings understood in the relevant technical field.

[0026] Please refer to Figure 1 , an embodiment of the present invention provides a switching circuit for connecting supercapacitors in series and in parallel, the switching circuit comprising a signal receiving end and a switching matrix; wherein the switching matrix comprises connected series switching branches and parallel switching branches;

[0027] The signal receiving end is used to receive the series / parallel driving signal;

[0028] The signal receiving end is connected to the switching matrix, and the switching matrix is ​​configured as follows:

[0029] Based on the series / parallel driving signal, the corresponding switching branch is controlled to work, so as to realize the switching between series and parallel connection of the supercapacitors.

[0030] In this embodiment, the signal receiving end is Figure 1 SW1 and SW2 are used to represent it; wherein SW1 receives the corresponding series drive signal, and SW2 receives the corresponding parallel drive signal; it should be noted that the series / parallel drive signal is generated by the external MCU triggering the corresponding drive device, and the drive device can adopt an optical coupler, which should be well known to those skilled in the art and will not be elaborated here.

[0031] Furthermore, the switching matrix includes a plurality of supercapacitors and MOS tubes, and the gate of each MOS tube is connected to a switching device; Figure 1 In the embodiment, the series-parallel structure of several supercapacitors is only used as an example, and is not intended to limit the structure.

[0032] Specifically, the switch device adopts a diode; a corresponding resistor is connected between the gate and source of each MOS tube, and the anode of each diode is connected to the corresponding signal receiving end, and the cathode of each diode is connected to the gate of the corresponding MOS tube.

[0033] Further, one end of the resistor is connected to the switch device, and the other end of the resistor is directly grounded or grounded through a MOS tube;

[0034] This overcomes the problem of static electricity accumulation that is currently caused by driving through floating ground isolation, resulting in strong static electricity discharge, which may cause static electricity breakdown or strong interference.

[0035] In this embodiment, at the same time, the series drive signal and the parallel drive signal have different level polarities; that is, at the same time, only one of the series drive signal and the parallel drive signal is valid, thereby preventing the series switching branch and the parallel switching branch from being turned on at the same time.

[0036] During implementation, at least one MOS tube is connected between the positive and negative electrodes of adjacent super capacitors, thereby forming a series-parallel connection between the super capacitors.

[0037] Furthermore, the series switching branches and the parallel switching branches are connected to each other to form a plurality of H-type structures.

[0038] In this embodiment, the switching matrix includes supercapacitors C1, C2, C3 and C4, and MOS tubes Q1, Q2, Q3, Q4, Q5, Q6, Q7, Q8 and Q9;

[0039] The positive electrode of the super capacitor C1 is connected to the power supply VCC, the drain electrodes of Q1, Q2 and Q3 respectively, the negative electrode of the super capacitor C1 is connected to the drain electrode of Q7 and the source electrode of Q4 respectively, the source electrode of Q7 is grounded, the drain electrode of Q4 is connected to the source electrode of Q1 and the positive electrode of the super capacitor C2 respectively, the negative electrode of the super capacitor C2 is connected to the source electrode of Q5 and the drain electrode of Q8 respectively, the source electrode of Q8 is grounded, the drain electrode of Q5 is connected to the source electrode of Q2 and the positive electrode of the super capacitor C3 respectively, the negative electrode of the super capacitor C3 is connected to the source electrode of Q6 and the drain electrode of Q9 respectively, the source electrode of Q9 is grounded, the drain electrode of Q6 is connected to the source electrode of Q3 and the positive electrode of the super capacitor C4 respectively, and the negative electrode of the super capacitor C4 is also connected to the ground;

[0040] The SW1 is connected to the gates of the MOS transistors Q4, Q5 and Q6 respectively; the SW2 is connected to the gates of the MOS transistors Q7, Q1, Q8, Q2, Q9 and Q3 respectively.

[0041] The working process of this program is as follows:

[0042] 1. In series mode, SW1 is high level and valid, SW2 is low level and invalid, corresponding to Figure 2 The MOS tubes Q4, Q5, and Q6 are turned on based on the SW1-ON signal, realizing the series connection of supercapacitors C1, C2, C3, and C4.

[0043] 2. In parallel mode, SW2 is high level and valid, SW1 is low level and invalid, corresponding to Figure 3 The MOS tubes Q7, Q1, Q8, Q2, Q9, and Q3 are turned on based on the SW2-ON signal, realizing the parallel connection of supercapacitors C1, C2, C3, and C4.

[0044] Further, based on the same principle as above, refer to Figure 4 This embodiment also provides an application solution that is extended to n supercapacitors connected in series and parallel, so that the solution has specific and flexible feasibility and scalability; wherein n is a positive integer.

[0045] This solution proposes a supercapacitor series and parallel switching circuit, utilizes the series switching branches and parallel switching branches connected in the switching matrix, and controls the corresponding switching branches to work based on the received series / parallel driving signals to achieve the series and parallel switching of supercapacitors; the entire circuit only involves simple supercapacitors and MOS tube devices, and the circuit structure is simple, thereby overcoming the complex structure existing in the prior art and the need to deploy additional electronic components, thereby increasing the complexity and cost of the solution.

[0046] In the embodiments provided in the present application, it should be understood that the disclosed circuits can also be implemented in other ways. The embodiments described above are merely schematic. It should also be noted that in some alternative implementations, the functions marked in the boxes can also occur in an order different from the order marked in the accompanying drawings. For example, two consecutive boxes can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of boxes in the block diagram and / or flow chart can be implemented with a dedicated hardware-based system that performs a specified function or action, or can be implemented with a combination of dedicated hardware and computer instructions.

[0047] In addition, the functional modules in the various embodiments of the present invention can be integrated together to form an independent part, or each module can exist separately, or two or more modules can be integrated to form an independent part. The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

[0048] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the present invention, and these modifications or replacements should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A switching circuit for connecting supercapacitors in series and in parallel, characterized in that: The switching circuit includes a signal receiving end and a switching matrix; wherein the switching matrix includes connected series switching branches and parallel switching branches; The signal receiving end is used to receive the series / parallel driving signal; The signal receiving end is connected to the switching matrix, and the switching matrix is ​​configured as follows: Based on the series / parallel driving signal, the corresponding switching branch is controlled to work, so as to realize the switching between series and parallel connection of the supercapacitors.

2. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 1, characterized in that: The switching matrix includes a plurality of supercapacitors and MOS tubes, and the gate of each MOS tube is connected with a switching device.

3. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 2, characterized in that: The switch device is a diode.

4. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 3, characterized in that: A corresponding resistor is connected between the gate and source of each MOS tube.

5. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 4, characterized in that: At the same time, the series drive signal and the parallel drive signal have different level polarities.

6. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 2, characterized in that: At least one MOS tube is connected between the positive and negative electrodes of adjacent supercapacitors.

7. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 4, characterized in that: The series switching branches and the parallel switching branches are connected to each other to form a plurality of H-type structures.

8. A switching circuit for connecting supercapacitors in series and in parallel as claimed in claim 5, characterized in that: One end of the resistor is connected to the switch device, and the other end of the resistor is directly grounded or grounded through a MOS tube.

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