Charge pal battery pack buck-boost switching device capable of keeping single external charging mode and serving as inverter input power supply

Abstract

A charge pal battery pack buck-boost switching device keeping a single external charging mode and serving as an inverter input power supply is composed of a mobile power supply battery pack, a switching circuit, a mobile power supply circuit and an inverter circuit. The mutually parallel battery packs in the mobile power supply are divided into three groups, namely a first battery group 1, a second battery group 2 and a third battery group 3, the parallel and series states of the batteries are switched by a main switch 10 for controlling five internal independent unit loops, and the boost and buck voltage is regulated and controlled. When the main switch 10 is in a state that each normally-connected pin a is disconnected with each contact pin b and is connected or contacted with each contact pin c, the first battery group 1, the second battery group 2 and the third battery group 3 are changed into a three-group serial connection state from a relatively low voltage for supplying the working of the mobile power supply in a previous parallel connection state; and the voltage is boosted to a relatively high working voltage which can basically meet the requirement of the inverter 34. The portable mobile power supply does not additionally depend on a vehicle-mounted power supply or a storage battery which is charged independently, keeps a single charging mode of the portable mobile power supply, supplies power to a portable notebook computer, a small-power electric tool and small high-brightness lighting equipment in emergency, and has the characteristics of dual purposes, low cost, convenience and practicability.

Description

Technical Field

[0001] A power bank battery pack buck-boost switching device that maintains a single external charging mode while also serving as the input power for the inverter is applicable to the small household appliance sector. Background Technology

[0002] Existing power banks and portable chargers are all designed for charging and discharging standard low-voltage portable devices such as mobile phones, and do not have the higher input voltage required by inverters. To meet the emergency charging needs of small laptops, low-power power tools and lighting equipment, they can only be achieved through vehicle power supplies or battery power, and vehicle power supplies and batteries also require dedicated charging equipment to charge them separately, which is very inconvenient.

[0003] Purpose of the invention

[0004] The purpose of this invention is to design an emergency power supply device that combines a power bank with an inverter input power supply, maintaining a single external charging mode. Summary of the Invention

[0005] This utility model comprises a mobile power bank battery pack, a switching circuit, and the aforementioned mobile power bank circuit and inverter circuit. The parallel battery packs in the mobile power bank are divided into three groups: a first battery group 1, a second battery group 2, and a third battery group 3. The positive contact of the first battery group 1 is the first positive contact 4, and the negative contact is the first negative contact 5. The positive contact of the second battery group 2 is the second positive contact 6, and the negative contact is the second negative contact 7. The positive contact of the third battery group 3 is the third positive contact 8, and the negative contact is the third negative contact 9. The main switch 10 in the switching circuit is a five-way, three-wire, two-position toggle switch or rotary switch. It controls the simultaneous connection or disconnection of five independent internal circuit units: switch 11 (k1), switch 12 (k2), switch 13 (k3), switch 14 (k4), and switch 15 (k5). K1 switch is normally connected to pin A (16), K1 switch is in contact with pin B (17), K1 switch is in contact with pin C (18); K2 switch is normally connected to pin A (19), K2 switch is in contact with pin B (20), K2 switch is in contact with pin C (21); K3 switch is normally connected to pin A (22), K3 switch is in contact with pin B (23), K3 switch is in contact with pin C (24); K4 switch is normally connected to pin A (25), K4 switch is in contact with pin B (26), K4 switch is in contact with pin C (27); K5 switch is normally connected to pin A (28), K5 switch is in contact with pin B (29), K5 switch is in contact with pin C (30). The first positive contact 4 is connected to contact pin 17 of k1; the first negative contact 5 in the first battery group 1 is connected to contact pin 28 of k5 and contact pin 26 of k4; the second positive contact 6 in the second battery group 2 is connected to contact pin 16 of k1 and contact pin 20 of k2; the second negative contact 7 in the second battery group 2 is connected to contact pin 25 of k4 and contact pin 23 of k3; the third positive contact 8 in the third battery group 3 is connected to contact pin 19 of k2; the third negative contact 9 in the third battery group 3 is connected to contact pin 22 of k3. When the main switch 10 is in the state where each contact pin a and each contact pin b are connected, the first positive contact 4, the second positive contact 6 and the third positive contact 8 are connected to form a conductive wire; at the same time, the first negative contact 5, the second negative contact 7 and the third negative contact 9 are connected to form a conductive wire. At this time, the first battery group 1, the second battery group 2, and the third battery group 3 are connected in parallel, and their nominal voltage of 3.7V remains unchanged.When the main switch is in the state where all normally connected pins a and b are disconnected and connected or in contact with pins c, the first negative contact 5 is connected to the second positive contact 6, and the second negative contact 7 is connected to the third positive contact 8. The contact pins c of switches k3 12, k4 14, and k5 15 are all in the neutral state. Therefore, the first battery group 1, the second battery group 2, and the third battery group 3 change from the previous parallel state to a three-group series state. The voltage between the first positive contact 4 and the third negative contact 9 changes from 3.7V in parallel to a higher voltage of nearly 12V suitable for inverter use after series connection. Connect the first positive contact 4 to the positive input B+ terminal 32 of the battery pack in the mobile power supply circuit 31. Connect the negative input B- terminal 33 of the battery pack in the mobile power supply circuit 31 to the first negative contact 5 connected to the contact b pin 29 of switch k5. Connect the first positive contact 4 to the positive port 35 of the 12V input power of inverter 34. Connect its negative port 36 to the third negative contact 9.

[0006] This utility model does not rely on a separate vehicle power supply or battery for charging, maintaining a single charging mode for portable power banks. It provides emergency power for small laptops, low-power power tools, and small high-brightness lighting equipment, and features dual functionality, low cost, and convenience. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the electrical principle and wiring pins of the battery pack switching circuit of this utility model. Detailed Implementation

[0008] Example: This example consists of a power bank battery pack, a switching circuit, and the aforementioned power bank circuit and inverter circuit. The parallel battery packs in the power bank are divided into three groups: a first battery group 1, a second battery group 2, and a third battery group 3. The positions of the relatively independent first battery group 1, second battery group 2, and third battery group 3 remain unchanged, and their corresponding positive and negative polarity contacts are also disconnected, returning to their respective positive and negative poles. Specifically, the positive contact of the first battery group 1 is the first positive contact 4, and the negative contact is the first negative contact 5. The positive contact of the second battery group 2 is the second positive contact 6, and the negative contact is the second negative contact 7. The positive contact of the third battery group 3 is the third positive contact 8, and the negative contact is the third negative contact 9. The main switch 10 in the switching circuit is a five-way, three-wire, two-position toggle switch or rotary switch. It controls the simultaneous connection or disconnection of the five internal independent circuit units. That is, switches K1 (11), K2 (12), K3 (13), K4 (14), and K5 (15). Their three pins are as follows: K1 switch 11: normally connected to pin A (16), contact pin B (17), contact pin C (18); K2 switch 12: normally connected to pin A (19), contact pin B (20), contact pin C (21); K3 switch 13: normally connected to pin A (22), contact pin B (23), contact pin C (24); K4 switch 14: normally connected to pin A (25), contact pin B (26), contact pin C (27); K5 switch 15: normally connected to pin A (28), contact pin B (29), contact pin C (30). The wiring of each switch pin and the voltage changes after switching each battery pack in the on or off state are as follows: The first positive contact 4 in the first battery pack 1 is connected to contact pin 17 of k1; the first negative contact 5 in the first battery pack 1 is connected to contact pin 28 of k5 and contact pin 26 of k4; the second positive contact 6 in the second battery pack 2 is connected to contact pin 16 of k1 and contact pin 20 of k2; the second negative contact 7 in the second battery pack 2 is connected to contact pin 25 of k4 and contact pin 23 of k3; the third positive contact 8 in the third battery pack 3 is connected to contact pin 19 of k2; the third negative contact 9 in the third battery pack 3 is connected to contact pin 22 of k3. When the main switch 10 is in the state where all normally connected pins a and b are connected, the first positive contact 4, the second positive contact 6, and the third positive contact 8 are connected, forming a conductive wire; at the same time, the first negative contact 5, the second negative contact 7, and the third negative contact 9 are connected, forming a conductive wire. Meanwhile, the first battery group 1, the second battery group 2, and the third battery group 3 are in parallel connection, and their nominal 3.7V voltage remains unchanged.When the main switch 10 is in a state where all normally connected pins a and b are disconnected and connected to pins c, the first negative contact 5 is connected to the second positive contact 6, and the second negative contact 7 is connected to the third positive contact 8. All contact pins c of switches k3 12, k4 14, and k5 15 are in a neutral state. Therefore, the first battery group 1, the second battery group 2, and the third battery group 3 change from a parallel state to a series state. The voltage between the first positive contact 4 and the third negative contact 9 changes from 3.7V in parallel to a higher voltage of approximately 12V suitable for inverter use. The first positive contact 4 is connected to the positive input B+ terminal 32 of the battery pack in the power supply circuit 31, and the negative input B- terminal 33 of the battery pack in the power supply circuit 31 is connected to the first negative contact 5 connected to contact pin b 29 of switch k5. At this time, the power supply circuit 31 operates due to the supplied battery power. The first positive contact 4 is connected to the positive port 35 of the 12V input power supply of the inverter 34, and its negative port 36 is connected to the third negative contact 9. At this time, the inverter starts working because it has a relatively high DC voltage input that meets its basic operating requirements. After being boosted by the inverter circuit, it outputs 220V AC power.

Claims

1. A power bank battery pack buck-boost switching device that maintains a single external charging mode while also serving as the input power source for an inverter, comprising a power bank battery pack, a switching circuit, a power bank circuit, and an inverter circuit, characterized in that, In the power bank, the parallel battery packs are divided into three groups: the first battery group (1), the second battery group (2), and the third battery group (3). The positions of the first battery group (1), the second battery group (2), and the third battery group (3) remain unchanged, and the corresponding positive and negative polarity contacts are also disconnected and returned to the positive and negative poles of their respective battery groups. That is, the positive contact of the first battery group (1) is the first positive contact (4), and the negative contact is the first negative contact (5); the positive contact of the second battery group (2) is the second positive contact (6), and the negative contact is the second negative contact (7); the positive contact of the third battery group (3) is the third positive contact (8), and the negative contact is the third negative contact (9). The main switch (10) in the switching circuit is a five-way three-wire two-position toggle switch or slide switch, which controls the simultaneous connection or disconnection of five independent circuit units inside, namely switch k1 (11), switch k2 (12), switch k3 (13), switch k4 (14), and switch k5 (15). The three pins of each switch are as follows: the three pins of switch k1 (11) are: switch k1 normally connected to pin a (16), switch k1 contact pin b (17), and switch k1 contact pin c (18); the three pins of switch k2 (12) are: switch k2 normally connected to pin a (19) ), K2 switch contacts pin b (20), K2 switch contacts pin c (21); K3 switch (13) has three pins: K3 switch normally connected to pin a (22), K3 switch contacts pin b (23), K3 switch contacts pin c (24); K4 switch (14) has three pins: K4 switch normally connected to pin a (25), K4 switch contacts pin b (26), K4 switch contacts pin c (27); K5 switch (15) has three pins: K5 switch normally connected to pin a (28), K5 switch contacts pin b (29), K5 switch contacts pin c (30); The wiring of each switch pin, and the voltage changes of each battery pack after switching between on and off states are described below: The first positive contact (4) in the first battery group (1) is connected to the contact pin (17) of switch k1; the first negative contact (5) in the first battery group (1) is connected to the normally connected pin (28) of switch k5 and the contact pin (26) of switch k4. The second positive contact (6) in the second battery group (2) is connected to the normally connected pin a (16) of switch k1 and the contact pin b (20) of switch k2; the second negative contact (7) in the second battery group (2) is connected to the normally connected pin a (25) of switch k4 and the contact pin b (23) of switch k3. The third positive contact (8) in the third battery group (3) is connected to the normally connected pin (19) of switch k2; the third negative contact (9) in the third battery group (3) is connected to the normally connected pin (22) of switch k3. When the main switch (10) is in the state where each normally connected pin a and each contact pin b are connected, the first positive contact piece (4), the second positive contact piece (6) and the third positive contact piece (8) are connected to form a conductive wire. At the same time, the first negative contact piece (5), the second negative contact piece (7) and the third negative contact piece (9) are connected to form a conductive wire. At this time, the first battery group (1), the second battery group (2) and the third battery group (3) are in a state of parallel connection, and their nominal voltage of 3.7V remains unchanged. When the main switch (10) is in a state where each normally connected a pin is disconnected from each contact b pin and connected or in contact with each contact c pin, the first negative contact piece (5) is connected to the second positive contact piece (6), the second negative contact piece (7) is connected to the third positive contact piece (8), and the contact c pins of switches (12), (14) and (15) are all in the neutral state. Therefore, the first battery group (1), the second battery group (2) and the third battery group (3) change from the previous parallel state to the three groups in series state. The voltage between the first positive contact piece (4) and the third negative contact piece (9) changes from 3.7V in parallel to a higher voltage of close to 12V suitable for inverter use after series connection.

2. The power bank battery pack buck-boost switching device that maintains a single external charging mode and also serves as the input power supply for the inverter, as described in claim 1, is characterized in that... The first positive contact (4) is connected to the positive input B+ terminal (32) of the battery pack in the mobile power circuit (31), and the negative input B- terminal (33) of the battery pack in the mobile power circuit (31) is connected to the first negative contact (5) connected to the k5 pin b (29). At this time, the mobile power circuit (31) works because of the supplied battery power.

3. The power bank battery pack buck-boost switching device that maintains a single external charging mode and also serves as the input power supply for the inverter, as described in claim 1, is characterized in that... The first positive contact (4) is connected to the positive port (35) of the 12V input power supply of the inverter (34), and its negative port (36) is connected to the third negative contact (9). At this time, the inverter (34) has a relatively high DC voltage input that meets its basic operating requirements, and it starts to work. After being boosted by the inverter circuit, it outputs 220V AC power.

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