Self-circulation power bank

Abstract

The invention discloses a self-circulation power bank which comprises a power bank body, and a power generation unit is installed in the power bank body. And the power generation unit comprises a motor and a power generator, the motor is in transmission connection with the power generator through a gear, and the power generator is electrically connected with the energy storage unit through a second connecting wire. The power generation unit is installed in the power bank body, so that the motor on the power generation unit is connected with the power generator through the first connecting line, the power generator is driven to generate power, output power is input into an energy storage battery of the energy storage unit, and a plurality of output ports are formed in a connecting port circuit board of the energy storage unit. Wherein one output port is provided with a third connecting line, so that the third connecting line provides power generation power for a motor of the power generation unit, the interior of the power bank body can be charged and supplemented automatically, and then the energy storage battery is charged after voltage transformation and energy storage, and a self-circulation charging system is formed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of mobile charging devices, in particular to a self-circulation power bank. BACKGROUND

[0002] In today's digital age, power banks have become an indispensable electronic accessory in people's lives, providing power support for various mobile devices.

[0003] However, the existing power banks have the following problems:

[0004] 1. Charging method: Ordinary power banks need to be connected to external power sources (such as mains sockets, computer USB interfaces, etc.) for charging, and the charging process has too many limitations. When the power bank runs out of power, you must find a suitable power interface and use the matching charging cable to connect and charge until the power is full.

[0005] 2. Cell technology: Ordinary power banks mostly use 18650 / 21700 cylindrical lithium batteries or lithium polymer soft package cells. 18650 cells are widely used and have relatively low cost, but their energy density is limited, and their capacity decreases significantly after multiple charge-discharge cycles. Lithium polymer soft package cells have certain advantages in volume and weight, and can be made into thinner power banks, but they also have the problem of insufficient cycle life.

[0006] 3. Cycle life: The cycle life of ordinary power banks is relatively short, generally between 300-800 charge-discharge cycles. As the number of cycles increases, the capacity of the cell gradually decreases, for example, after 500 cycles, the capacity may drop to 70%-80% of the initial capacity, which means that the power bank can provide less and less power to the device, and the usage time will also be shortened. Eventually, it may not meet the daily use requirements due to low capacity, and a new power bank needs to be replaced.

[0007] 4. Charging speed: The charging power of ordinary power banks varies greatly, with some basic models having a charging power of only 5W-10W, resulting in slow charging of devices such as mobile phones. It may take 2-3 hours or even longer to fully charge a mobile phone. Some ordinary power banks that support fast charging have a charging power of about 18W-22.5W.

[0008] 5. Convenience of use: Ordinary power banks usually need to be carried with additional charging cables, and when charging multiple devices, multiple charging cables of different interface types may be needed, which can easily cause cable entanglement. Moreover, ordinary power banks are simply used as mobile power sources, and their functions are relatively single.

[0009] Six, safety performance: ordinary power bank due to the quality of the battery cell uneven, and some products in the circuit design, security mechanism is not perfect, there are certain security risks, for example, when the raw materials of the battery cell problems, such as the change of the diaphragm material leads to the decline of insulation performance, in the long-term charging and discharging cycle process prone to short circuit, and then trigger the risk of overheating, burning:

[0010] Seven, cost price: ordinary power bank due to mature technology, market competition is fierce, the price range is relatively wide, from tens of yuan to hundreds of yuan, and some basic version, small capacity, ordinary performance of ordinary power bank price is more people-oriented, may only need dozens of yuan, and with fast charging function, large capacity of ordinary power bank price is relatively high, but overall the price is relatively transparent, consumers can choose a large space.

[0011] Based on the above shortcomings of the power bank, and the patent disclosed on February 17, 2016, the power bank can be self-charged (application number: 201510734770.3), the existing self-charging power bank cannot realize closed loop circulation due to energy loss, and needs to rely on external power supply intermittent power supply, we need a kind of self-circulating power bank to solve the above technical problems and provide power support at any time and anywhere. SUMMARY

[0012] In view of the above defects or deficiencies in the prior art, it is desirable to provide a self-circulating power bank for solving the technical problems of the existing self-charging power bank due to energy loss, which cannot realize closed loop circulation and needs to rely on external power supply intermittent power supply.

[0013] According to the technical scheme provided by the embodiment of the present application, a self-circulating power bank includes a power bank body, a power generation unit is installed inside the power bank body;

[0014] The power generation unit includes a motor and a generator, the motor and the generator are connected through gear transmission, the energy conversion efficiency of the power generation unit is greater than 70%, and the generator is connected to the energy storage unit through a second connecting line, so that the generator supplies power to the energy storage battery in the power bank body;

[0015] The energy storage unit is provided with a plurality of output ports at the output end, and one of the output ports is connected with a third connecting line, and the third connecting line is electrically connected with the motor to provide power for the operation of the motor;

[0016] The standby battery is electrically connected with the motor through a fourth connecting line, so that when the energy storage battery is less than 10%, the standby battery is automatically started by the voltage detection circuit to operate the motor.

[0017] Further, the energy storage unit comprises a transformer circuit board, an energy storage battery and a connection port circuit board, the output end of the transformer circuit board is electrically connected with the input end of the energy storage battery through a fifth connecting line, and the energy storage battery is electrically connected with the connection port circuit board through a sixth connecting line.

[0018] Further, the input end of the transformer circuit board is electrically connected with a second connecting line, so that the power output by the generator is input into the transformer circuit board for voltage stabilization.

[0019] Further, a plurality of output connecting heads are connected to the output port.

[0020] Further, the energy storage battery adopts a lithium iron phosphate cell and a new material such as gallium nitride as an anode material.

[0021] Further, the power bank body is further provided with an overcharge protector, a temperature controller and a short circuit protector, so that the overcharge protector, the temperature controller and the short circuit protector can protect the power bank body.

[0022] Further, the surface of the power bank body is further provided with a display screen for displaying the charging capacity.

[0023] In summary, the beneficial effects of the present application are:

[0024] I. By installing a power generation unit in the power bank body, the motor on the power generation unit is connected with the generator through a first connecting line, so as to drive the generator to generate electricity, and the output power is input into the energy storage battery of the energy storage unit, and a plurality of output ports are arranged on the connection port circuit board of the energy storage unit, one of the output ports is provided with a third connecting line, so as to provide power for the motor of the power generation unit, so as to charge the power bank body internally, and then charge the energy storage battery after voltage conversion, to form a self-circulating charging system, which solves the problem of traditional power bank needing additional charging.

[0025] II. By arranging a backup battery in the power bank, the backup battery can provide power for the motor on the power generation unit when the energy storage battery is out of power, so that the motor drives the generator to rotate, so that mechanical energy is converted into electrical energy, and then the transformer converts the alternating current into direct current and stores it in the energy storage battery, so as to supplement the power for the normal operation of the power bank. BRIEF DESCRIPTION OF DRAWINGS

[0026] Other features, objects and advantages of the present application will become more apparent from the following detailed description of non-limiting embodiments made with reference to the accompanying drawings:

[0027] Figure 1 The whole structure of the present application is shown in the schematic diagram;

[0028] Figure 2 The working principle of the application is shown in the figure;

[0029] Figure label: power bank body 100, power generation unit 110, motor 111, generator 112, energy storage unit 120, voltage conversion circuit board 121, energy storage battery 122, connection port circuit board 123, output port 1231, second connection line 140, third connection line 150, fourth connection line 160, fifth connection line 170, sixth connection line 180, backup battery 190. DETAILED DESCRIPTION

[0030] The application will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific examples described herein are merely intended to explain the related application, and are not a limitation on the application. In addition, it should be noted that only the parts related to the application are shown in the drawings for ease of description.

[0031] It should be noted that the examples in the present application and the features in the examples can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and examples.

[0032] A self-circulating power bank, as shown in Figure 1 , includes a power bank body 100, which has a power generation unit 110 installed inside. The power generation unit 110 includes a motor 111 and a generator 112. The motor 111 is connected to the generator 112 through a gear transmission to drive the generator 112 to rotate and convert mechanical energy into electrical energy with a conversion efficiency of more than 70%. The electrical energy is then transmitted to an energy storage unit 120 electrically connected to the generator 112, and stored in an energy storage battery 122 of the energy storage unit 120, so that the power generation unit 110 supplies power to the energy storage battery 122 in the power bank body 100.

[0033] As shown in Figure 1 , the energy storage unit 120 includes a voltage conversion circuit board 121, an energy storage battery 122, and a connection port circuit board 123. The output end of the voltage conversion circuit board 121 is electrically connected to the input end of the energy storage battery 122 through a fifth connection line 170. The energy storage battery 122 is electrically connected to the connection port circuit board 123 through a sixth connection line 180. The output end of the connection port circuit board 123 is provided with a plurality of output ports 1231. One of the output ports 1231 is connected to a third connection line 150, which is electrically connected to the motor 111 on the power generation unit, to provide power for the operation of the motor 111. The power bank body 100 can generate electricity, perform voltage conversion and direct charging, and charge the energy storage battery 122 after voltage conversion and energy storage, forming a self-circulating charging system.

[0034] As shown in Figure 1As shown, the standby battery 190 is electrically connected with the motor 111 through the fourth connecting line 160, so that when the energy storage battery 122 on the energy storage unit 120 is less than 10%, the standby battery 190 automatically starts the motor 111 on the electrically connected power generation unit 110 to run through the voltage detection circuit, so that the generator 112 connected with the motor 111 converts mechanical energy into electrical energy and stores it in the energy storage battery 122 of the energy storage unit 120, thereby keeping the inside of the power bank body 100 normal charging and discharging operation.

[0035] As shown in Figure 1 and Figure 2 As shown, the input end of the voltage conversion circuit board 121 is electrically connected with the second connecting line 140, so that the power output by the generator 112 is input into the voltage conversion circuit board 121 through the second connecting line 140, and after processing in the voltage conversion circuit board 121, the voltage is stabilized, and the electrical energy is converted into direct current and delivered to the energy storage battery 122 for storage.

[0036] As shown in Figure 1 and Figure 2 In order to improve the convenience of the power bank body 100, a plurality of output connecting heads are connected on the output port 1231, so that the power bank body 100 is provided with various types of charging lines, and it is not necessary to separately prepare data lines when going out, and it is convenient to carry. At the same time, the surface of the power bank body 100 is also provided with a display screen, which can clearly display the remaining power in real time, so that the user can know the power state of the power bank at any time.

[0037] The energy storage battery 122 adopts a lithium iron phosphate (LiFePO4) cell. The lithium iron phosphate cell has the characteristics of high safety and long cycle life. After 2000 deep charge and discharge cycles, the battery capacity can still maintain more than 80% of the initial capacity, greatly reducing the long-term use cost. The cycle life of ordinary lithium batteries is usually a few hundred times, prolonging the service life of the power bank body 100. In addition, the storage battery of the present power bank body 100 uses a new type of material such as gallium nitride as anode material. The gallium nitride material has higher energy density, which can provide longer battery endurance time for the power bank body 100. Even after a large number of charge and discharge cycles, the capacity retention rate of the power bank body 100 is still high, which can continuously and stably supply power to the equipment in the long-term use process, reducing the trouble and cost of frequent replacement of the power bank. The power bank body 100 directly charges the equipment from power generation (20000mA / 60min, which can be charged to full power); the energy storage battery 122 is charged from power generation (20000mA / 60min, which can be charged to full power), the charging time is greatly shortened, and the power bank body 100 also has multiple connection ports supporting high-power fast charging, which can quickly charge the mobile phone, notebook computer and other equipment to full power, and also can charge itself, greatly saving the charging time.

[0038] The overcharge protector, temperature controller and short circuit protector are installed in the power bank body 100 to protect the power bank body 100, and high-quality and stable battery cells, such as lithium iron phosphate battery cells (or solid-state battery cells), are used to reduce the risk of fire and explosion, thereby creating a safe use environment for users.

[0039] The working principle of the self-circulating power bank is as follows:

[0040] The power generation unit 110 is installed in the power bank body 100, so that the motor 111 on the power generation unit 110 is connected with the generator 112 through the first connecting line 130, thereby driving the generator 112 to generate electricity. The generator 112 converts mechanical energy into electrical energy, and the output electrical energy is input from the second connecting line 140 into the input end of the transformer circuit board 121 of the energy storage unit 120, so that the electrical energy is converted into direct current power, and the output end of the transformer circuit board 121 is connected with the input end of the energy storage battery 122, thereby storing the electrical energy in the energy storage battery 122. A plurality of output ports 1231 are arranged on the connecting port circuit board 123 of the energy storage unit 120, and one of the output ports 1231 is provided with the third connecting line 150, so that the third connecting line 150 provides power generation power for the motor 111 of the power generation unit 110, so that the power bank body 100 can be charged and supplemented by itself, and the energy storage battery 122 is charged after being transformed and stored, thereby forming a self-circulating charging system, which solves the problem of the traditional power bank that needs to be charged additionally. The backup battery 190 is arranged in the power bank, so that the backup battery 190 provides power for the motor 111 of the power generation unit 110 when the energy storage battery 122 is out of power, so that the motor 111 drives the generator 112 to rotate, so that the mechanical energy is converted into electrical energy, which is converted into direct current by the transformer and stored in the energy storage battery 122, thereby supplementing the power for the normal operation of the power bank.

[0041] The above description is only the preferred embodiment of the application and the description of the technical principles and schemes. Meanwhile, the scope of the application is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by the combination of the above technical features or equivalent features without departing from the inventive concept. For example, the above features are replaced with the technical features disclosed in the application (but not limited to) having similar functions to form a technical solution.

Claims

1. A self-circulation power bank, comprising a power bank body (100), an internal installation of a power generation unit (110), characterized in that: The power generation unit (110) comprises a motor (111) and a generator (112), the motor (111) is connected with the generator (112) through gear transmission, and the generator (112) is connected with an energy storage unit (120) through a second connecting line (140), so that the generator (112) supplies power for the energy storage battery (122) in the power bank body (100); The energy storage unit (120) is provided with a plurality of output ports (1231) at the output end, and one of the output ports (1231) is connected with a third connecting line (150), and the third connecting line (150) is connected with the motor (111) to provide power for the operation of the motor (111); A backup battery (190) is connected with the motor (111) through a fourth connecting line (160), so that when the energy storage battery (122) is out of power, the backup battery (190) is started to operate the motor (111).

2. The self-circulation power bank of claim 1, wherein: The energy storage unit (120) comprises a voltage conversion circuit board (121), an energy storage battery (122) and a connection port circuit board (123), the output end of the voltage conversion circuit board (121) is connected with the input end of the energy storage battery (122) through a fifth connecting line (170), and the energy storage battery (122) is connected with the connection port circuit board (123) through a sixth connecting line (180).

3. The self-circulation power bank of claim 2, wherein: The input end of the voltage conversion circuit board (121) is connected with the second connecting line (140), so that the power output by the generator (112) is input into the voltage conversion circuit board (121) for voltage stabilization.

4. The self-circulation power bank of claim 1, wherein: A plurality of output connectors are connected to the output port (1231).

5. The self-circulation power bank of claim 1, wherein: The energy storage battery (122) uses a lithium iron phosphate battery cell.

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