Power strip with battery charging function

Abstract

The utility model discloses a power strip with a battery charging function. The power strip comprises an upper shell and a plugboard base, the upper shell covers the plugboard base, and the upper shell and the plugboard base form a power strip inner cavity; a power line is inserted into the inner cavity of the power strip from one end and is connected with the metal sheets in the inner cavity of the power strip; the upper shell is provided with a three-port jack; when a plug is inserted into the three-port jack, a metal sheet of the plug is in contact with a metal sheet in an inner cavity of the power strip; a control panel and a battery charging groove are arranged in the inner cavity of the power strip; an opening is formed in the position, corresponding to the battery charging groove, of the upper shell so that a rechargeable battery can be conveniently placed into the battery charging groove or taken out of the battery charging groove. The power strip with the battery charging function has the advantages of being capable of charging rechargeable batteries on the basis of having the power strip function, suitable for charging different types of rechargeable batteries and the like.

Description

Technical Field

[0001] The utility model relates to a socket strip, in particular to a power socket strip with a battery charging function. Background Art

[0002] A socket strip is a multi-outlet socket with a wire, also known as a power strip or extension socket, and its scientific name is a wire lengthening component or an extension cord socket. A socket strip refers to a multi-outlet socket with a power cord and a plug that can be moved. It can connect more than one power plug, saving both space and wiring.

[0003] A rechargeable battery is a rechargeable battery with a limited number of charging cycles and is used in conjunction with a charger. The advantages of rechargeable batteries are economy, environmental protection, sufficient power, and the ability to be repeatedly charged, making them suitable for high-power and long-time use electrical appliances (such as walkmans, electric toys, etc.). There are several types of rechargeable batteries, including nickel-cadmium batteries, nickel-metal hydride batteries, lithium-ion batteries, lead-acid batteries, and lithium iron phosphate batteries.

[0004] With the development of technology, people's demand for electric energy is increasing day by day, and many devices in life need to use electricity. And the ways of using electric energy are also diverse. The current socket strips have only a single function, such as a single mains 220V output or a USB-5V output, which makes people feel very inconvenient to use. Due to the diversity of electrical appliances, people may need multiple power supply devices to meet their electricity needs.

[0005] Currently, many rechargeable batteries are equipped with dedicated charging seats. This kind of charging seat is matched with the rechargeable battery and is generally not suitable for charging rechargeable batteries of other brands, resulting in very poor versatility. Content of the Utility Model

[0006] The utility model aims to avoid the deficiencies in the above-mentioned existing technologies and provides a power socket strip with a battery charging function, which can charge rechargeable batteries on the basis of having the function of a socket strip and is suitable for charging different types of rechargeable batteries.

[0007] The utility model adopts the following technical solutions to solve the technical problems.

[0008] A power socket strip with a battery charging function of the utility model includes an upper shell 1 and a socket board base; the upper shell covers the socket board base, and the upper shell and the socket board base form a socket strip inner cavity;

[0009] A power cord 7 is inserted into the socket strip inner cavity from one end and is connected to the socket in the socket strip inner cavity; the upper shell is provided with a three-hole socket 2, and when the plug is inserted into the three-hole socket, the plug is electrically connected to the socket in the socket strip inner cavity;

[0010] A control board and a battery charging slot 5 are arranged in the inner cavity of the socket strip; an opening is arranged at the position of the upper shell corresponding to the battery charging slot to facilitate putting a rechargeable battery into the battery charging slot or taking the rechargeable battery out of the battery charging slot.

[0011] The structural feature of a power socket strip with a battery charging function of the present utility model also lies in that:

[0012] Further, an outer cover capable of closing the opening is arranged on the upper shell.

[0013] Further, the outer cover is hinged to the upper shell, so that the outer cover can be flipped to open or close the battery charging slot.

[0014] Further, the control board includes a microcontroller MCU, a power supply circuit, a reference voltage circuit, a battery constant current discharge circuit, a battery charging indicator circuit, a mode button and indicator circuit, a battery charging circuit and a plurality of sockets.

[0015] Further, a mode button 4 and a mode indicator hole 3 are arranged on the upper shell.

[0016] Further, a charging indicator hole 6 is arranged on one side of the battery charging slot 5.

[0017] Further, the microcontroller MCU is JZIC_SOP16.

[0018] Further, the power supply circuit includes a voltage regulation chip U9, a switching power supply chip U11, a rectifier bridge D1, resistors R1~R9, capacitors C1~C6, capacitor C8, a transformer U8 and diodes D2~D5.

[0019] Further, the battery charging circuit includes a first charging circuit, a second charging circuit, a third charging circuit and a fourth charging circuit; the first charging circuit includes a battery charging slot BT1 AA, resistors R14~R16 and a triode Q1; the second charging circuit includes a battery charging slot BT2AA, resistors R17~R19 and a triode Q2; the third charging circuit includes a battery charging slot BT3 AA, resistors R20~R22 and a triode Q3; the fourth charging circuit includes a battery charging slot BT4AA, resistors R23~R25 and a triode Q4.

[0020] Further, the battery constant current discharge circuit includes a first constant current discharge circuit and a second constant current discharge circuit; the first constant current discharge circuit includes an operational amplifier U3, resistors R30~R35, capacitors C13~C14 and triodes Q5~Q6; the second constant current discharge circuit includes an operational amplifier U10, resistors R36~R41, capacitors C15~C16 and triodes Q7~Q8.

[0021] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0022] The present utility model discloses a power strip with a battery charging function, which includes an upper shell and a plug board base; the upper shell covers the plug board base, and the upper shell and the plug board base form an inner cavity of the power strip; a power cord is inserted into the inner cavity of the power strip from one end and is connected to a metal sheet in the inner cavity of the power strip; the upper shell is provided with three-hole sockets, and when a plug is inserted into the three-hole sockets, the metal sheet of the plug is in contact with the metal sheet in the inner cavity of the power strip; a control board and a battery charging slot are arranged in the inner cavity of the power strip; an opening is arranged at a position corresponding to the battery charging slot on the upper shell to facilitate putting a rechargeable battery into the battery charging slot or taking the rechargeable battery out of the battery charging slot.

[0023] The power strip with a battery charging function of the present utility model enables a user to realize multiple electrical energy outputs through one device when using electrical energy, and can simultaneously have a 220V output, a USB-5V output, a function of charging nickel-metal hydride batteries and nickel-cadmium batteries, and can provide an optimal storage environment for nickel-metal hydride and nickel-cadmium batteries on one power control device, and is suitable for rechargeable batteries of various different brands.

[0024] The power strip with a battery charging function of the present utility model has the advantages of being able to charge rechargeable batteries on the basis of having the function of a power strip and being suitable for charging different types of rechargeable batteries. Description of the Drawings

[0025] Figure 1 It is a front view of a power strip with a battery charging function of the present utility model.

[0026] Figure 2 It is a circuit framework diagram of a power strip with a battery charging function of the present utility model.

[0027] Figure 3 It is a circuit diagram of the microcontroller MCU of a power strip with a battery charging function of the present utility model.

[0028] Figure 4 It is a circuit diagram of the power supply circuit of a power strip with a battery charging function of the present utility model.

[0029] Figure 5 It is a circuit diagram of the battery charging circuit of a power strip with a battery charging function of the present utility model.

[0030] Figure 6 It is a circuit diagram of the battery constant current discharge circuit of a power strip with a battery charging function of the present utility model.

[0031] Figure 7Circuit diagram of the reference voltage circuit of a power strip with battery charging function of the present utility model.

[0032] Figure 8 Circuit diagram of the mode button and indicator light circuit of a power strip with battery charging function of the present utility model.

[0033] Figure 9 Circuit diagram of the battery charging indicator light circuit of a power strip with battery charging function of the present utility model.

[0034] Figure 10 Schematic diagram of the socket of a power strip with battery charging function of the present utility model.

[0035] The present utility model will be further described below through specific embodiments in conjunction with the accompanying drawings. Specific embodiments

[0036] See Figures 1 to 10 , a power strip with battery charging function of the present utility model includes an upper shell 1 and a plug board base; the upper shell covers the plug board base, and the upper shell and the plug board base form an inner cavity of the power strip;

[0037] The power cord 7 is inserted into the inner cavity of the power strip from one end and is connected to the socket in the inner cavity of the power strip; the upper shell is provided with a three-hole socket 2, and when the plug is inserted into the three-hole socket, the plug is electrically connected to the socket in the inner cavity of the power strip;

[0038] A control board and a battery charging slot 5 are arranged in the inner cavity of the power strip; an opening is arranged at a position corresponding to the battery charging slot on the upper shell to facilitate putting the rechargeable battery into the battery charging slot or taking the rechargeable battery out of the battery charging slot.

[0039] As Figure 1 , a power strip with battery charging function of the present utility model includes a plurality of sockets with 220V output function, a plurality of AA / AAA battery charging slots and a plurality of USB charging interfaces. The sockets with 220V output function include four pin sockets, which can supply power to products that require 220V power supply for users. The USB charging interface is mainly composed of two USB-A female sockets, which can supply power to products with a small power 5V input voltage such as mobile phones, headphones, and power banks for users.

[0040] The AA / AAA battery charging slot can be used by users to charge 1.2V nickel-metal hydride or nickel-cadmium batteries, and can also keep the battery at the 1.2V rated voltage point, which is beneficial to the protection of battery life.

[0041] A power strip with a battery charging function according to the present utility model integrates the function of a nickel-metal hydride and nickel-cadmium battery charging box, and can place nickel-metal hydride and nickel-cadmium batteries into the battery slots for charging and storage. At the same time, the power strip has the functions of 200V output of a common power strip and USB-5V output.

[0042] In specific implementation, an outer cover capable of closing the opening is provided on the upper shell.

[0043] In specific implementation, the outer cover is hinged to the upper shell, so that the outer cover can be flipped to open or close the battery charging slot.

[0044] Under normal circumstances, the battery charging slot is covered by the outer cover to prevent dust or foreign objects from entering the battery charging slot and affecting normal charging. When it is necessary to take out or put in the charging battery, the outer cover is opened.

[0045] In specific implementation, the control board includes a microcontroller MCU, a power supply circuit, a reference voltage circuit, a battery constant current discharge circuit, a battery charging indicator circuit, a mode button and indicator circuit, a battery charging circuit, and multiple sockets.

[0046] As Figure 2 is a framework diagram of the control board, and the connection relationships between the various circuit modules are as Figure 2 shown.

[0047] In specific implementation, a mode button 4 and a mode indicator hole 3 are provided on the upper shell.

[0048] A touch button is provided on the upper shell as the mode button 4. The mode button is correspondingly arranged with the push switch SW1 of the mode button and indicator circuit, and can open or close the push switch SW1. LED9 corresponds to the mode indicator hole, which is convenient for observing whether LED9 is lit.

[0049] In specific implementation, a charging indicator hole 6 is provided on one side of the battery charging slot 5.

[0050] In specific implementation, the microcontroller MCU is JZIC_SOP16.

[0051] As Figure 3 is a circuit diagram of the microcontroller MCU, and the connection relationships between the various components are shown in Figure 3 . The microcontroller circuit includes a chip U1 and a capacitor C7. The model of the microcontroller MCU chip U1 is JZ8P2615-SOP16 (the manufacturer is Wuxi Jingzhe Technology Co., Ltd., and the sales website: http: / / www.wxjzkj.com / about_product / MCUdpj053.html).

[0052] In specific implementation, the power supply circuit includes a voltage regulation chip U9, a switching power supply chip U11, a rectifier bridge D1, resistors R1 to R9, capacitors C1 to C6, capacitor C8, a transformer U8, and diodes D2 to D5.

[0053] As Figure 4 shown in the circuit diagram of the power supply circuit, the connection relationships between the components are shown in Figure 4 . The power supply circuit mainly controls the power supply to the MCU and serves as the power source for battery charging. AC220V is converted to DC220V through the rectifier bridge, and then the power supply voltages of DC1 + 2V and DC + 2V are obtained through step-down by the transformer. Among them, DC + 12V is regulated to 5V by the LDO-HT7550 to supply power to the MCU. And DC + 2V will be used for battery charging.

[0054] The model of the voltage regulation chip U9 is HT7550-1. The HT75XX series is a three-port low-power high-voltage regulator using COMS technology, allowing an input voltage up to 24V and capable of outputting several fixed voltages from 3.0V to 5.0V. The COMS technology ensures low voltage drop and low quiescent current. HT7550 can also obtain variable voltages and currents through peripheral components. The maximum input voltage of HT7550-1 can reach 30V, and the output voltage range is 1.5V to 12.0V. HT7550-1 has characteristics such as high-precision output voltage, extremely low supply current, and extremely low dropout voltage.

[0055] The model of the switching power supply chip U11 is U6217. In order to meet the stringent requirements for average efficiency and standby power consumption, the switching power supply chip U6217 adopts a multi-mode control technology combining amplitude modulation control (AM) and frequency modulation control (FM). When approaching full-load output, the system operates in the frequency modulation working mode. The LED lighting driver chip U6217 adopts a multi-mode control technology combining frequency modulation control and amplitude modulation control in the constant voltage output mode, and at the same time, a current source flows out from the CS pin to adjust the CS voltage signal. Using the above technologies, U6217 can achieve no abnormal sound operation from full load to no load. The drive circuit with the soft drive function designed by U6217 optimizes the system EMI performance. There is a Gate high-level 16V clamping circuit designed inside the chip to prevent the Gate from being damaged when a high VDD input occurs.

[0056] In specific implementation, the battery charging circuit includes a first charging circuit, a second charging circuit, a third charging circuit, and a fourth charging circuit; the first charging circuit includes a battery charging slot BT1 AA, resistors R14 to R16, and a triode Q1; the second charging circuit includes a battery charging slot BT2 AA, resistors R17 to R19, and a triode Q2; the third charging circuit includes a battery charging slot BT3 AA, resistors R20 to R22, and a triode Q3; the fourth charging circuit includes a battery charging slot BT4AA, resistors R23 to R25, and a triode Q4.

[0057] As Figure 5 is the circuit diagram of the battery charging circuit, and the connection relationships between various components are shown in Figure 5 . When the user does not insert the battery, the battery charging circuit is in an open circuit state and no current loop will be generated. When the user inserts the battery and after the MCU detects that the conditions for charging are met, the MCU will turn on the triode, thereby charging the battery. The charging is carried out by the power supply circuit outputting a voltage of +2V to charge the battery. The first charging circuit, the second charging circuit, the third charging circuit, and the fourth charging circuit are all connected to the MCU pins 15 (BT1), 14 (BT2), 13 (BT2), and 12 (BT4).

[0058] In specific implementation, the battery constant current discharging circuit includes a first constant current discharging circuit and a second constant current discharging circuit; the first constant current discharging circuit includes an operational amplifier U3, resistors R30 to R35, capacitors C13 to C14, and triodes Q5 to Q6; the second constant current discharging circuit includes an operational amplifier U10, resistors R36 to R41, capacitors C15 to C16, and triodes Q7 to Q8.

[0059] As Figure 6 is the circuit diagram of the battery constant current discharging circuit, and the connection relationships between various components are shown in Figure 6 . The battery constant current discharging circuit realizes that the current flowing through the emitter of the triode 1R5 in the battery output current always remains 300 mA through the operational amplifiers U3 and U10. When it is greater than 300 mA, that is, when the voltage across the 1R5 resistor (also called the sampling resistor, i.e., Figure 6 R31, R35, R37, and R41 in

[0060] As Figure 7 is the circuit diagram of the reference voltage circuit, and the connection relationships between various components are shown in Figure 7。The reference voltage circuit includes a voltage regulator chip U4, resistors R27 to R29, and a capacitor C12. The voltage regulator chip U4 is a controllable precision voltage regulator TL431. The reference voltage circuit outputs a constant 0.459V using the TL431 reference chip, and this voltage will be used for the battery constant current discharge part to keep the constant current stable. The output voltage of TL431 can be set to any value in the range from 2.5V to 36V using two resistors. The typical dynamic impedance of this device is 0.2Ω, and it is used to replace the zener diode in many applications, such as digital voltmeters, operational amplifier circuits, adjustable power supplies, switching power supplies, etc. TL431 is a shunt voltage regulator integrated circuit. Because of its good performance and low price, it is widely used in various power supply circuits.

[0061] Such as Figure 8 is the circuit diagram of the mode button and indicator light circuit. The connection relationship between each component is shown in Figure 8 。The mode button and indicator light circuit includes a push-button switch SW1, a resistor R26, and a light-emitting diode LED9. When the blue LED9 lights up, it means the battery is in the storage mode, and the device will charge / discharge the battery to keep the battery constant at 1.2V. There is a push-button switch SW1 on this utility model. Pressing the push-button switch SW1 will switch the battery charging / storage mode. When the blue LED9 lights up, it is in the storage mode, and vice versa in the charging mode. The mode button 4 is used to switch between the charging and storage modes. When in the charging mode, the battery is indicated by a red / green dual-color light, and when in the storage mode, the blue LED light is used for indication.

[0062] Such as Figure 9 is the circuit diagram of the battery charging indicator light circuit. The connection relationship between each component is shown in Figure 9 。The battery charging indicator light circuit includes resistors R10 to R13 and light-emitting diodes LED1 to LED8. The battery charging indicator light is used to remind the user of the current state of the battery, whether it is charging or fully charged. 4 red / green dual-color LEDs correspond to the charging status of the charging slots of each battery cell. When charging, the red light is on, and when fully charged, the green light is on. The AA / AAA battery charging slots are used to place the batteries, and this structure can accommodate nickel-metal hydride / nickel-cadmium batteries of AA and AAA specifications. When a 1.5V dry battery is inserted, the red light will flash and the charging will stop to remind the user.

[0063] Figure 10 is the schematic diagram of the circuit connection of the socket. Four sockets U2, U5 to U7 can be used to supply power to mains products, providing the user with an AC220V power supply function. The three metal pieces of the socket are respectively connected to the external power supply terminals LIN, LOUT, and N of the power cord.

[0064] In specific implementation, the power strip with battery charging function of the present utility model includes four AA / AAA battery slots, four red / green dual-color LEDs (LED1 to LED8), and one blue LED (LED9).

[0065] The power strip with battery charging function of the present utility model enables users to use electrical energy through one device to achieve multiple electrical energy outputs, and can simultaneously have 220V output, USB-5V output, the function of charging nickel-metal hydride batteries and nickel-cadmium batteries, and can provide the best storage environment for nickel-metal hydride and nickel-cadmium batteries on one power control device.

[0066] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

[0067] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power strip with a battery charging function, characterized in that: It comprises an upper shell (1) and a plug-in board base; the upper shell covers the plug-in board base, and the upper shell and the plug-in board base form an inner cavity of the plug-in board; The power cord (7) is inserted into the inner cavity of the strip from one end and connected to the socket in the inner cavity of the strip; the upper shell is provided with three sockets (2), and when the plug is inserted into the three sockets, the plug and the socket in the inner cavity of the strip are electrically connected to each other; A control panel and a battery charging slot (5) are arranged in the inner cavity of the socket strip; an opening is arranged at a position of the upper shell corresponding to the battery charging slot to facilitate placing a rechargeable battery into the battery charging slot or taking a rechargeable battery out of the battery charging slot; The control board includes a battery charging circuit and a battery constant current discharge circuit; the battery charging circuit includes a first charging circuit, a second charging circuit, a third charging circuit and a fourth charging circuit; the first charging circuit includes a battery charging slot BT1 AA, resistors R14~R16 and a transistor Q1; the second charging circuit includes a battery charging slot BT2 AA, resistors R17~R19 and a transistor Q2; the third charging circuit includes a battery charging slot BT3 AA, resistors R20~R22 and a transistor Q3; the fourth charging circuit includes a battery charging slot BT4 AA, resistors R23~R25 and a transistor Q4; the battery constant current discharge circuit includes a first constant current discharge circuit and a second constant current discharge circuit; the first constant current discharge circuit includes an operational amplifier U3, resistors R30~R35, capacitors C13~C14 and transistors Q5~transistor Q6; the second constant current discharge circuit includes an operational amplifier U10, resistors R36~R41, capacitors C15~C16 and transistors Q7~transistor Q8.

2. The power strip with battery charging function according to claim 1, characterized in that: The upper shell is provided with an outer cover which can close the opening.

3. The power strip with battery charging function according to claim 2, characterized in that: The outer cover is hinged to the upper shell so that the outer cover can be turned over to open or close the battery charging slot.

4. The power strip with battery charging function according to claim 1, characterized in that: The control board includes a microcontroller MCU, a power supply circuit, a reference voltage circuit, a battery constant current discharge circuit, a battery charging indicator light circuit, a mode button and indicator light circuit, a battery charging circuit and a plurality of sockets.

5. The power strip with battery charging function according to claim 4, characterized in that: The upper shell is provided with a mode button (4) and a mode indicator light hole (3).

6. The power strip with battery charging function according to claim 4, characterized in that: A charging indicator light hole is provided on one side of the battery charging slot (5).

7. The power strip with battery charging function according to claim 4, characterized in that: The microcontroller MCU is JZIC_SOP16.

8. The power strip with battery charging function according to claim 4, characterized in that: The power supply circuit includes a voltage adjustment chip U9, a switching power supply chip U11, a rectifier bridge D1, resistors R1-R9, capacitors C1-C6, a capacitor C8, a transformer U8 and diodes D2-D5.

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