A domestic intelligent charging controller

Abstract

The application discloses a kind of domestic intelligent charging controller in the field of electrical engineering, including the current generation circuit, voltage current acquisition circuit and battery charging circuit connected in turn along the direction of current;Current generation circuit includes photovoltaic electric board, and the junction of photovoltaic electric board and voltage current acquisition circuit is wrapped with protection component, and the protection component includes rubber shell, and there is sealed cavity between rubber shell and voltage current acquisition circuit, and the sealed cavity is communicated with the storage tank loaded with cooling liquid, and the storage tank is located on the radial side of rubber shell, and the inside of sealed cavity is provided with stretched shape memory plastic, and the other end of shape memory plastic is fixedly connected with tension spring in compressed state, relative to the prior art using clean energy, in the technical scheme, it is considered that photovoltaic panel receives thermal energy, which will have a high temperature effect on the circuit, resulting in increased cable resistance and reduced current flow, so the cable is cooled.

Description

Technical Field

[0001] This invention belongs to the field of electrical engineering, specifically a household intelligent charging controller. Background Technology

[0002] The energy crisis and environmental pollution have led to increased global attention on the application of renewable and clean energy sources such as solar and wind power. Solar energy cannot generally be used directly; it must first be stored in batteries by photovoltaic arrays before it can be used. Therefore, charge and discharge controllers for solar energy applications are the core of solar power systems. Currently, there are many models of such controllers available, and the technology is relatively mature. Their basic principle involves acquiring voltage, current, and temperature signals and using PWM technology to control charging and discharging. These products feature overcharge, over-discharge, and overload protection functions.

[0003] For example, the existing technology CN102891518A is an intelligent solar charging controller. This charging controller not only realizes the above functions, but also protects the battery and extends its working life by accurately measuring, calculating and controlling the system parameters while ensuring the maximum utilization of solar energy.

[0004] However, this charging controller does not take into account the drawback that the increased cable resistance due to rising temperature reduces the current throughput. Summary of the Invention

[0005] To address the aforementioned problems, the purpose of this invention is to provide a household intelligent charging controller that overcomes the increase in cable resistance and reduces the current throughput.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows: A household intelligent charging controller includes a current generating circuit, a voltage and current acquisition circuit, and a battery charging circuit connected sequentially along the current direction; the current generating circuit includes a photovoltaic panel, and a protective component is wrapped around the connection between the photovoltaic panel and the voltage and current acquisition circuit. The protective component includes a rubber shell, and a sealed cavity is provided between the rubber shell and the voltage and current acquisition circuit. The sealed cavity is connected to a storage tank containing coolant, and the storage tank is located on the radial side of the rubber shell. A stretched shape memory plastic is provided inside the sealed cavity, and the stretched shape memory plastic seals the connection between the storage tank and the sealed cavity. One end of the shape memory plastic is fixedly connected to a base, and the other end of the shape memory plastic is fixedly connected to a tension spring in a compressed state.

[0007] The above solution achieves the following beneficial effects: 1. Compared with traditional charging controllers, this technical solution uses photovoltaic technology to convert solar energy into storable electricity, thereby realizing the conversion of clean energy into electricity.

[0008] 2. Compared with existing technologies that use clean energy, this technical solution takes into account that the photovoltaic panel will generate high temperatures on the circuit after receiving heat energy, which will increase the resistance of the cable and reduce the current flow. Therefore, the cable is cooled. During the cooling process, the shape memory plastic will return to its initial state at high temperature, thereby releasing the coolant in the storage tank into the sealed cavity. At this time, the coolant absorbs heat from the cable, reducing the impact of heat energy on the circuit. When the shape memory plastic returns to room temperature, the tension spring returns, thereby stretching the shape memory plastic and resealing the storage tank. When the shape memory plastic returns, it also drives away the coolant.

[0009] 3. Compared with existing heat-absorbing technologies, this technical solution utilizes the characteristic of shape memory plastic to recover at high temperatures. Since the shape memory plastic shortens after recovery, its volume increases, causing the rubber shell to swell. When the charging personnel notice insufficient current supply, they can judge whether it is due to excessive temperature based on the swelling of the rubber shell, thus achieving the detection effect.

[0010] 4. Compared with existing detection technologies, in this technical solution, because the shape memory rubber is stretched by the tension spring or recovers due to its own properties during temperature changes, it will produce reciprocating deformation at the critical value (until the temperature rises to the point where the shape memory rubber fully recovers), thereby achieving the effect of a hydraulic pump and promoting coolant exchange and circulation.

[0011] Furthermore, the voltage and current acquisition circuit includes a first voltage and current acquisition circuit for acquiring the photovoltaic panel and a second voltage and current acquisition circuit for acquiring the battery voltage and current. The first voltage and current acquisition circuit and the second voltage and current acquisition circuit are connected in parallel with a main control circuit. The main control circuit is electrically connected to a microcontroller, a drive circuit and a DC / DC conversion circuit. The microcontroller is connected to a WiFi module.

[0012] Furthermore, the main control circuit has a built-in power control system for obtaining the maximum available power from the solar panel. The control system includes an MPPT algorithm that changes the duty cycle of the PWM wave to achieve real-time tracking of the maximum power point during the control process.

[0013] Furthermore, the control system includes the following charging phases: I. Fast Charging Phase: During the initial charging phase, the battery voltage has not yet reached the set value for a full charge. Therefore, a fast charging method is used. MPPT charging can charge the battery with the maximum solar energy, and perform constant voltage charging when the battery voltage reaches the set value. II. Maintenance Charging Phase. Once the battery voltage reaches the set maintenance voltage value, constant voltage charging is initiated, MPPT charging is discontinued, and the charging current gradually decreases. III. Float charging stage: The battery is already fully charged, so a small current charging method is used for float charging to make up for the energy loss caused by battery self-discharge and keep the battery fully charged. IV. Equalization Charging Stage: Due to uneven voltage during battery use, equalization charging agitates the electrolyte to balance the battery voltage, thereby improving the battery's lifespan.

[0014] Furthermore, the WiFi module is connected to a cloud platform that displays charging information to the mobile client in real time.

[0015] Beneficial effects: The modular design comprises a lower-level hardware system and a higher-level software system. On the hardware side, the design of protection circuits, data acquisition circuits, and other circuits ensures the safety, reliability, and stability of the equipment. On the software side, the optimization of software algorithms improves the efficiency of the equipment.

[0016] Furthermore, the connection between the shape memory plastic and the tension spring includes a heat insulation platform. One end of the heat insulation platform is bonded to the shape memory plastic, and the other end is welded to the tension spring. This reduces the recovery efficiency of the shape memory plastic, giving it a lag in recovery or cooling, while also reducing the impact of the coolant on the shape memory plastic.

[0017] Furthermore, in the initial state, the shape memory plastic is connected to the storage slot and the sealed cavity. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the circuit connection according to an embodiment of the present invention; Figure 2 MPPT algorithm flow; Figure 3 A cross-sectional view to protect the main view of the component; Figure 4 for Figure 3 Side sectional view. Detailed Implementation

[0019] The following detailed description illustrates the specific implementation method: The attached diagram includes the following reference numerals: 1. Cable; 2. Rubber shell; 3. Sealing cavity; 4. Storage tank; 5. Base; 6. Tension spring; 7. Insulation platform; 8. Shape memory plastic.

[0020] The basic implementation examples are as follows: Figure 1As shown: A home smart charging controller includes a current generating circuit, a voltage and current acquisition circuit, and a battery charging circuit connected sequentially along the current direction. The current generating circuit includes a photovoltaic panel. The connection between the photovoltaic panel and the voltage and current acquisition circuit is encased in a protective component. The protective component includes a rubber shell 2 encasing a cable 1. A sealed cavity 3 is located between the rubber shell 2 and the voltage and current acquisition circuit. The sealed cavity 3 is connected to a storage tank 4 containing coolant. The storage tank 4 is located on one radial side of the rubber shell 2. A stretched shape memory plastic 8 is provided inside the sealed cavity 3. The stretched shape memory plastic 8 seals the connection between the storage tank 4 and the sealed cavity 3. In its initial state, the storage tank 4 and the sealed cavity 3 are connected. The charging circuit is the circuit connecting the photovoltaic cell and the battery. It is usually connected using a DC circuit. This project plans to expand the circuitry on a Buck circuit.

[0021] Please refer to Figure 3 and Figure 4 One end of the shape memory plastic 8 is fixedly connected to a base 5, and the other end of the shape memory plastic 8 is fixedly connected to a tension spring 6 under compression. The connection between the shape memory plastic 8 and the tension spring 6 is equipped with a heat insulation platform 7. One end of the heat insulation platform 7 is bonded to the shape memory plastic 8, and the other end of the heat insulation platform 7 is welded to the tension spring 6.

[0022] The voltage and current acquisition circuit includes a first voltage and current acquisition circuit for acquiring data from the photovoltaic panel and a second voltage and current acquisition circuit for acquiring data from the battery. A main control circuit is connected in parallel with the first and second voltage and current acquisition circuits. The main control circuit is electrically connected to a microcontroller, a drive circuit, and a DC / DC converter circuit. The microcontroller is connected to a WiFi module. The WiFi module is connected to a cloud platform for displaying charging information to a mobile client in real time.

[0023] The main control circuit has a built-in power control system that obtains the maximum available power from the solar panel. The control system includes an MPPT algorithm that changes the duty cycle of the PWM wave to achieve real-time tracking of the maximum power point during the control process.

[0024] The control system includes the following charging stages: I. Fast Charging Phase: During the initial charging phase, the battery voltage has not yet reached the set value for a full charge. Therefore, a fast charging method is used. MPPT charging can charge the battery with the maximum solar energy, and perform constant voltage charging when the battery voltage reaches the set value. II. Maintenance Charging Phase. Once the battery voltage reaches the set maintenance voltage value, constant voltage charging is initiated, MPPT charging is discontinued, and the charging current gradually decreases. III. Float charging stage: The battery is already fully charged, so a small current charging method is used for float charging to make up for the energy loss caused by battery self-discharge and keep the battery fully charged. IV. Equalization Charging Stage: Due to uneven voltage during battery use, equalization charging agitates the electrolyte to balance the battery voltage, thereby improving the battery's lifespan.

[0025] The specific implementation process is as follows: This technical solution adopts a modular design, and the entire system consists of a lower-level hardware system and an upper-level software system. The lower-level hardware system uses photovoltaic technology to convert solar energy into storable electricity, thereby realizing the conversion of clean energy into electrical energy. Simultaneously, considering that the photovoltaic panel will generate high temperatures in the circuit after receiving heat, leading to increased resistance in cable 1 and reduced current flow, cable 1 is cooled. During the cooling process, shape memory plastic 8 returns to its initial state at high temperatures, releasing the coolant in the storage tank 4 into the sealed cavity 3. At this time, the coolant absorbs heat from cable 1, reducing the impact of heat on the circuit. When the shape memory plastic 8 returns to room temperature, the tension spring 6 returns, stretching the shape memory plastic 8 and resealing the storage tank 4. Furthermore, the return of the shape memory plastic 8 drives away the coolant.

[0026] The shape memory rubber is stretched by the tension spring 6 or recovers due to its own properties during temperature changes. Therefore, it will produce reciprocating deformation at the critical value (until the temperature rises to the point where the shape memory rubber fully recovers), thereby achieving the effect of a hydraulic pump and promoting coolant exchange and circulation. On the hardware side, the design of protection circuits, data acquisition circuits, and other circuits ensures the safety, reliability, and stability of the equipment.

[0027] The MPPT algorithm flow in the host computer software system is as follows: Figure 2 As shown, V(K) represents the output voltage of the solar panel, V(K-1) represents the output voltage at the previous moment, I(K) represents the output current, P(K) represents the output power, and P(K-1) represents the output power at the previous moment. On the software side, the efficiency of the device has been improved through optimization of the software algorithm.

[0028] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0029] The above descriptions are merely embodiments of the present invention. Commonly known structures and characteristics of the solutions are not described in detail here. Those skilled in the art are aware of all common technical knowledge in the field prior to the application date or priority date, are aware of all existing technologies in that field, and have the ability to apply conventional experimental methods prior to that date. Those skilled in the art can, under the guidance of this application, improve and implement this solution in combination with their own capabilities. Some typical known structures or methods should not be obstacles for those skilled in the art to implement this application. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention. These should also be considered within the scope of protection of the present invention, and will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A home-use intelligent charging controller, characterized in that: It includes a current generating circuit, a voltage and current acquisition circuit, and a battery charging circuit connected sequentially along the current direction; the current generating circuit includes a photovoltaic panel, and the connection between the photovoltaic panel and the voltage and current acquisition circuit is covered with a protective component, which includes a rubber shell. There is a sealed cavity between the rubber shell and the voltage and current acquisition circuit. The sealed cavity is connected to a storage tank containing coolant. The storage tank is located on the radial side of the rubber shell. The sealed cavity is provided with stretched shape memory plastic. The stretched shape memory plastic seals the connection between the storage tank and the sealed cavity. One end of the shape memory plastic is fixedly connected to a base, and the other end of the shape memory plastic is fixedly connected to a tension spring in a compressed state. When the shape memory plastic is in its initial state, the storage slot and the sealed cavity are connected. When photovoltaic panels receive heat, they generate high temperatures in the circuit, causing the cable resistance to increase. During the cooling process, shape memory plastic returns to its initial state at high temperatures, releasing the coolant in the storage tank into the sealed cavity. This absorbs heat from the cable, reducing the impact of heat on the circuit. When the shape memory plastic returns to room temperature, the tension spring returns, stretching the shape memory plastic and resealing the storage tank.

2. A home intelligent charging controller according to claim 1, characterized in that: The voltage and current acquisition circuit includes a first voltage and current acquisition circuit for acquiring the photovoltaic panel and a second voltage and current acquisition circuit for acquiring the battery voltage and current. The first voltage and current acquisition circuit and the second voltage and current acquisition circuit are connected in parallel with a main control circuit. The main control circuit is electrically connected to a microcontroller, a drive circuit and a DC / DC conversion circuit. The microcontroller is connected to a WiFi module.

3. A home intelligent charging controller according to claim 2, characterized in that: The main control circuit has a built-in power control system for obtaining the maximum available power in the photovoltaic panel. The power control system includes an MPPT algorithm that changes the duty cycle of the PWM wave to achieve real-time tracking of the maximum power point during the control process.

4. A home intelligent charging controller according to claim 3, characterized in that: The power control system includes the following charging stages: I. Fast Charging Phase: During the initial charging phase, the battery voltage has not yet reached the set value for a full charge, so a fast charging phase is adopted. MPPT charging can charge the battery with the maximum solar energy, and perform constant voltage charging when the battery voltage reaches the set value. II. Maintenance charging phase: Once the battery voltage reaches the set maintenance voltage value, constant voltage charging is performed, MPPT charging is discontinued, and the charging current gradually decreases. III. Float charging stage: The battery is already fully charged, so a small current charging method is used for float charging to make up for the energy loss caused by battery self-discharge and keep the battery fully charged. IV. Equalization Charging Stage: Due to uneven voltage during battery use, equalization charging agitates the electrolyte to balance the battery voltage, thereby improving the battery's lifespan.

5. A home intelligent charging controller according to claim 2, characterized in that: The WiFi module is connected to a cloud platform that displays charging information to the mobile client in real time.

6. A home intelligent charging controller according to claim 1, characterized in that: The connection between the shape memory plastic and the tension spring has a heat insulation platform. One end of the heat insulation platform is bonded to the shape memory plastic, and the other end of the heat insulation platform is welded to the tension spring.

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