Energy storage charging device

Abstract

The utility model belongs to the technical field of mobile power supplies, and particularly discloses an energy storage charging device, which comprises a power supply conversion module, a lithium ion super capacitor bank, a lithium ion super capacitor charging and discharging protection board and a charging output circuit, the power supply conversion module is used for converting an external power supply into a first direct-current power supply to charge the lithium ion super capacitor bank, and the lithium ion super capacitor charging and discharging protection plate is used for performing charging and discharging protection on the lithium ion super capacitor bank; and the charging output circuit is used for converting the second direct-current power supply output by the lithium ion super capacitor bank into an external charging power supply. According to the utility model, rapid energy storage and discharging can be carried out, high-efficiency charging can be carried out on other electronic equipment, and the purpose of super rapid charging is realized; meanwhile, the energy density and the power density are high, and the applicability is high; and moreover, the device is long in service life, more environment-friendly and energy-saving, and has a wide application prospect.

Description

Technical Field

[0001] The utility model belongs to the technical field of mobile power supplies, and particularly relates to an energy storage charging device. Background Art

[0002] A mobile power supply (i.e., a power bank) is a portable charger that can be carried by an individual, stores electrical energy by itself, and is mainly used to charge electronic devices, especially in situations where there is no external power supply. Its main components include an energy storage unit for storing electrical energy and a circuit (DC-DC converter) for stabilizing the output voltage. Most mobile power supplies come with a charger for charging the built-in battery. Existing mobile power supplies mostly use batteries for energy storage and discharge, and generally have problems such as low charging efficiency, short service life, and lack of environmental friendliness, and thus need to be improved urgently. Content of the Utility Model

[0003] The purpose of the utility model is to provide an energy storage charging device to solve the above problems existing in the prior art.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The utility model provides an energy storage charging device, including a power conversion module, a lithium-ion supercapacitor bank, a lithium-ion supercapacitor charge and discharge protection board, and a charging output circuit. The power conversion module is used to convert an external power supply into a first DC power supply and transmit the first DC power supply to the lithium-ion supercapacitor bank. The lithium-ion supercapacitor bank is used to connect to the first DC power supply for charging and output a second DC power supply for discharging. The lithium-ion supercapacitor charge and discharge protection board is used to protect the lithium-ion supercapacitor bank during charging and discharging. The charging output circuit is used to convert the second DC power supply output by the lithium-ion supercapacitor bank into an external charging power supply and output the external charging power supply to an external electronic device through a charging interface.

[0006] During its application, the external power supply can be converted into a first DC power supply by the power conversion module to quickly charge the lithium-ion supercapacitor bank. After the lithium-ion supercapacitor bank is charged and stores energy, it can output a second DC power supply for quick discharge. The charging and discharging process of the lithium-ion supercapacitor bank can be protected by the lithium-ion supercapacitor charge and discharge protection board. Finally, the second DC power supply output by the lithium-ion supercapacitor bank is converted into an external charging power supply by the charging output circuit, and the external charging power supply is output to an external electronic device through the charging interface to charge the external electronic device.

[0007] In a possible design, the power conversion module is used to convert external AC mains into a first DC power supply, and the power conversion module is provided with an NCP1252A series switch power supply chip.

[0008] In a possible design, the power conversion module includes a constant current circuit for detecting the constant current output of a first DC power supply.

[0009] In a possible design, the constant current circuit includes an LM358 operational amplifier.

[0010] In a possible design, the lithium-ion supercapacitor bank includes at least two series-connected lithium-ion supercapacitors. The lithium-ion supercapacitor combines the advantages of high voltage resistance of electrolytic capacitors and large capacitance and high energy storage density of electrochemical capacitors, and has characteristics such as high energy density, high power density, fast charge and discharge, long cycle life, environmental protection, and good low-temperature performance.

[0011] In a possible design, the charge and discharge protection board of the lithium-ion supercapacitor includes a CM1020-N lithium battery protection chip. The CM1020-N lithium battery protection chip is built with a high-precision voltage detection circuit and current detection circuit, supports the detection of overcharge, over-discharge, over-discharge current, short circuit, and over-charge current, and realizes the protection function of the lithium-ion supercapacitor by detecting information such as the voltage, charge and discharge current, and temperature of each lithium-ion supercapacitor.

[0012] In a possible design, the charging output circuit includes a TPS5430DDA type switching regulator.

[0013] In a possible design, the charging interface uses a USB interface.

[0014] Advantageous effects: The utility model can perform rapid energy storage and discharge, efficiently charge other electronic devices, and achieve the purpose of super fast charging; at the same time, it has high energy density and power density, and strong applicability; moreover, it has a long service life, is more environmentally friendly and energy-saving, and has a wide application prospect. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0016] Figure 1 Schematic diagram of the device composition provided by the embodiment of the present utility model;

[0017] Figure 2 The first part of the circuit diagram of the power conversion module provided by the embodiment of the present utility model;

[0018] Figure 3 This is the second - part circuit diagram of the power conversion module provided by the embodiment of the present utility model;

[0019] Figure 4 This is the third - part circuit diagram of the power conversion module provided by the embodiment of the present utility model;

[0020] Figure 5 This is the fourth - part circuit diagram of the power conversion module provided by the embodiment of the present utility model;

[0021] Figure 6 This is the structural schematic diagram of the lithium - ion supercapacitor bank provided by the embodiment of the present utility model;

[0022] Figure 7 This is the circuit connection schematic diagram of the charge - discharge protection board of the lithium - ion supercapacitor and the lithium - ion supercapacitor bank provided by the embodiment of the present utility model;

[0023] Figure 8 This is the structural schematic diagram of the charge - discharge protection board of the lithium - ion supercapacitor provided by the embodiment of the present utility model;

[0024] Figure 9 This is the functional composition schematic diagram of the lithium - ion protection chip provided by the embodiment of the present utility model;

[0025] Figure 10 This is the schematic diagram of the charging output circuit provided by the embodiment of the present utility model. Detailed implementation manners

[0026] It should be noted here that the description of these embodiments is for helping to understand the present utility model, but does not constitute a limitation to the present utility model. The specific structural and functional details disclosed herein are only used to describe the exemplary embodiments of the present utility model. However, the present utility model can be embodied in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0027] It should be understood that unless otherwise clearly specified and defined, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments can be understood according to the specific circumstances.

[0028] Specific details are provided in the following description to facilitate a complete understanding of the example embodiments. However, those of ordinary skill in the art should understand that the example embodiments can be implemented without these specific details. For example, the system can be shown in a block diagram to avoid obscuring the example with unnecessary details. In other embodiments, well-known processes, structures, and technologies may not be shown with unnecessary details to avoid obscuring the embodiments.

[0029] Embodiment:

[0030] This embodiment provides an energy storage charging device, as Figure 1 shown, including a power conversion module, a lithium-ion supercapacitor bank, a lithium-ion supercapacitor charge and discharge protection board, and a charging output circuit. The power conversion module is used to convert an external power supply into a first DC power supply and transmit the first DC power supply to the lithium-ion supercapacitor bank. The lithium-ion supercapacitor bank is used to access the first DC power supply for charging and output a second DC power supply for discharging. The lithium-ion supercapacitor charge and discharge protection board is used to protect the lithium-ion supercapacitor bank during charging and discharging. The charging output circuit is used to convert the second DC power supply output by the lithium-ion supercapacitor bank into an external charging power supply and output the external charging power supply to an external electronic device through a charging interface.

[0031] During specific implementation, the external power supply can be converted into a first DC power supply by the power conversion module to quickly charge the lithium-ion supercapacitor bank. After the lithium-ion supercapacitor bank is charged and stores energy, it can output a second DC power supply for quick discharge. The charging and discharging process of the lithium-ion supercapacitor bank can be protected by the lithium-ion supercapacitor charge and discharge protection board. Finally, the second DC power supply output by the lithium-ion supercapacitor bank is converted into an external charging power supply by the charging output circuit, and the external charging power supply is output to an external electronic device through the charging interface to charge the external electronic device.

[0032] Furthermore, as Figures 2 to 5 shown, the power conversion module is used to convert external AC mains power (such as 220V AC power) into a first DC power supply. The power conversion module is equipped with an NCP1252A series switch power supply chip. The NCP1252A series switch power supply chip can be used to build a high-cost-performance and reliable AC-DC switch power supply, with multiple key features, such as:

[0033] 1. Peak current mode control: This control mode helps to improve the stability and efficiency of the power supply system.

[0034] 2. Adjustable switching frequency: Allows users to adjust the switching frequency according to specific application requirements to optimize performance.

[0035] 3. Primary - side over - current protection with latching: It has a fixed delay of 10 ms to provide additional safety.

[0036] 4. Adjustable soft - start timer: Avoids inrush current during startup and protects the circuit safety.

[0037] 5. Auto - recovery under - voltage detection: Provides protection under low input voltage conditions and enhances the safety of the converter.

[0038] 6. Internal 160 - ns front - edge blanking: Reduces electromagnetic interference (EMI) and improves power quality.

[0039] 7. Frequency jitter and adjustable internal slope compensation: Further optimizes EMI performance and reduces electromagnetic radiation.

[0040] 8. +500 mA / -800 mA sink / source current drive capability: Adapts to different load conditions and ensures the stable operation of the power supply system.

[0041] 9. Skip - cycle operation under light load / no load: Reduces power consumption and improves energy efficiency by skipping cycles under light load or no load conditions.

[0042] 10. Supports SOIC - 8 package: Can save PCB space and is suitable for cost - sensitive projects.

[0043] Meanwhile, the power conversion module includes a constant current circuit, which is used to detect the constant current output of the first DC power supply. The constant current circuit includes an LM358 operational amplifier. The LM358 constant current circuit usually uses an LM358 operational amplifier to form a current control loop, which includes components such as resistors, capacitors, and diodes to control the magnitude and stability of the output current. Specifically, the output current generates a voltage drop across the sampling resistor, and this voltage drop is sent to the non-inverting input terminal of the LM358 operational amplifier for comparison with the set reference voltage. The LM358 operational amplifier outputs an error signal based on the comparison result to facilitate the control of the magnitude and stability of the output current. To ensure the safety and stability of the circuit, some protection circuits can be added to the LM358 constant current circuit, such as overcurrent protection and overtemperature protection. The overcurrent protection circuit can be implemented by detecting whether the output current exceeds the set value. Once it exceeds the set value, the protection circuit will automatically cut off the output current to avoid circuit damage. The overtemperature protection circuit can be implemented by detecting whether the chip temperature exceeds the set value. Once it exceeds the set value, the protection circuit will automatically cut off the output current to avoid chip overheating. To improve the accuracy and stability of the circuit, the LM358 constant current circuit can also adopt some calibration and compensation measures, such as temperature compensation and linearization compensation. Temperature compensation can be achieved by adding a temperature sensor to the circuit, and the circuit parameters are automatically adjusted according to the temperature change to maintain the stability of the circuit. Linearization compensation can be achieved by adding a linearization circuit to the circuit, and the circuit parameters are automatically adjusted according to the magnitude of the output current to improve the accuracy of the circuit. The LM358 constant current circuit combined with the NCP1252A series of switch power supply chips can achieve dual control of the output current and voltage, achieving the effect that the power conversion module converts from AC power input to DC power constant current and constant voltage output.

[0044] Further, as Figures 6 to 7 shown, the lithium-ion supercapacitor bank includes at least two series-connected lithium-ion supercapacitors. A lithium-ion supercapacitor is an energy storage device that combines the characteristics and advantages of lithium-ion batteries and supercapacitors. It not only has the characteristics of fast charge and discharge and high power density of supercapacitors but also has the high energy density of lithium-ion batteries, enabling lithium-ion supercapacitors to show advantages in applications that require high energy density and high power density. This capacitor combines the voltage withstand characteristics of electrolytic capacitors with the large-capacity and high energy storage density of electrochemical capacitors, and through special structural design and material selection, it achieves the balance of high energy density and high power density.

[0045] The design of the lithium-ion supercapacitor takes into account the excellent voltage withstand characteristics of electrolytic capacitors. It combines the anode of a tantalum electrolytic capacitor and the cathode of an electrochemical capacitor, along with an appropriate electrolyte solution, to form a special structure. This structure enables the lithium-ion supercapacitor to possess the advantages of both high voltage withstand of electrolytic capacitors and large capacitance and high energy storage density of electrochemical capacitors, featuring high energy density, high power density, fast charge and discharge, long cycle life, environmental friendliness, and good low-temperature performance. Specifically, by replacing the anode with the anode of a tantalum electrolytic capacitor and still using the electrode of an electrochemical capacitor as the cathode, taking advantage of the large specific capacitance of the cathode material, compared with the anode capacitance, it can be regarded as the total capacitance of the supercapacitor. This design makes the total capacitance of the lithium-ion supercapacitor mainly determined by the size of the anode capacitance. At the same time, taking advantage of the large specific capacitance of the cathode material, it can be made very thin to minimize the space it occupies, and the remaining effective space is used to expand the anode, thereby maximizing the anode capacitance within the effective space and then increasing the energy storage density per unit volume. In addition, lithium-ion supercapacitors are sometimes also called hybrid supercapacitors because they combine the characteristics of lithium-ion batteries and supercapacitors, with high energy density and power density, which gives them an advantage in some applications that require high energy density and high power density.

[0046] Furthermore, as Figures 7 to 9As shown in the figure, the lithium-ion supercapacitor charge and discharge protection board is provided with a total positive lead solder pad and a total negative lead solder pad for docking the lithium-ion supercapacitor. The lithium-ion supercapacitor charge and discharge protection board integrates a CM1020-N type lithium battery protection chip and a power MOSFET (field effect transistor) group connected to the CM1020-N type lithium battery protection chip for high-power charge and discharge. The CM1020-N type lithium battery protection chip is built-in with a high-precision voltage detection circuit and a current detection circuit, including a voltage detection circuit for the energy storage unit, an overcharge and over-discharge signal processing unit, a logic processing unit, a delay circuit, a short-circuit detection unit, a charging over-current detection unit, and a discharging over-current detection unit, which supports the detection of overcharging, over-discharging, discharging over-current, short-circuit, and charging over-current. By detecting information such as the voltage, charge and discharge current, and temperature of each lithium-ion supercapacitor, the protection function of the lithium-ion supercapacitor is realized. The CM1020-N chip supports precision resistor detection, and all protection delays are built-in to ensure that the battery can be effectively protected under various usage conditions. The CM1020-N type lithium battery protection chip has six pins, including a DO pin, a CO pin, a VM pin, a VC pin, a VDD pin, and a VSS pin. Among them, the DO pin is the gate connection terminal of the MOSFET for discharge control, the CO pin is the gate connection terminal of the MOSFET for charge control, the VM pin is the over-current detection and charger detection terminal, the VC pin is the negative voltage of the energy storage unit 1 and the positive voltage connection terminal of the energy storage unit 2, the VDD pin is the positive power input terminal and the positive voltage connection terminal of the energy storage unit 1, and the VSS pin is the negative power input terminal and the negative voltage connection terminal of the energy storage unit 2.

[0047] Further, as Figure 10 shown, the charging output circuit includes a TPS5430DDA type switching regulator, and the TPS5430DDA type switching regulator has the following characteristics and functions:

[0048] 1. Wide input voltage range: The TPS5430DDA can accept an input voltage from 5.5V to 36V, which makes it suitable for various different power supply application scenarios.

[0049] 2. High output current: It can provide a continuous output current of up to 3A, meeting high-load requirements.

[0050] 3. High efficiency: Through a 100mΩ integrated MOSFET switch, it achieves a high efficiency of up to 95%, reducing energy waste.

[0051] 4. Precise voltage regulation: It has a high-performance voltage error amplifier and can provide high voltage regulation accuracy under transient conditions.

[0052] 5. Protection functions: including over-current limit, over-voltage protection, and thermal shutdown to protect the circuit from overload and overheat damage.

[0053] 6. Internal Compensation: The feedback loop is internally compensated, reducing the design complexity and the number of external components.

[0054] 7. Package Form: The 8-pin SOIC PowerPAD package is adopted, which is suitable for the design requirements of miniaturization and high integration.

[0055] In addition, the TPS5430DDA type switching regulator also has undervoltage lockout and soft-start circuits, which are used to prevent startup at low input voltages and limit inrush current respectively. These features make the TPS5430DDA switching regulator very suitable for various electronic devices that require high performance, high integration and reliable protection.

[0056] The charging interface uses a USB interface, which has the characteristics of universality, convenience, fast charging, safety and wide compatibility. Setting a USB interface to charge external electronic devices is more convenient and applicable.

[0057] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy storage charging device, characterized in that: It includes a power conversion module, a lithium-ion supercapacitor group, a lithium-ion supercapacitor charge and discharge protection board and a charging output circuit. The power conversion module is used to convert an external power supply into a first DC power supply, and transmit the first DC power supply to the lithium-ion supercapacitor group. The lithium-ion supercapacitor group is used to connect to the first DC power supply for charging, and output a second DC power supply for discharging. The lithium-ion supercapacitor charge and discharge protection board is used to charge and discharge the lithium-ion supercapacitor group. The charging output circuit is used to convert the second DC power supply output by the lithium-ion supercapacitor group into an external charging power supply, and output the external charging power supply to an external electronic device through a charging interface.

2. An energy storage charging device according to claim 1, characterized in that: The power conversion module is used to convert the external AC mains power into a first DC power supply, and the power conversion module is provided with a NCP1252A series switching power supply chip.

3. An energy storage charging device according to claim 2, characterized in that: The power conversion module includes a constant current circuit, and the constant current circuit is used to perform constant current output detection on the first direct current power supply.

4. The energy storage charging device according to claim 3, characterized in that: The constant current circuit includes an LM358 operational amplifier.

5. The energy storage charging device according to claim 1, characterized in that: The lithium ion supercapacitor group includes at least two lithium ion supercapacitors connected in series.

6. The energy storage charging device according to claim 1, characterized in that: The lithium-ion supercapacitor charge and discharge protection board includes a CM1020-N lithium battery protection chip.

7. The energy storage charging device according to claim 1, characterized in that: The charging output circuit includes a TPS5430DDA switching regulator.

8. The energy storage charging device according to claim 1, characterized in that: The charging interface is a USB interface.

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