Anti-short circuit charging battery for portable electric packer

Abstract

The utility model discloses a portable electric packing machine's short circuit protection charging battery, including shell, battery group, protection circuit board and interface, and interface includes charging interface and discharge interface, and charging interface includes C+ input end and C input end, and discharge interface includes P+ output end and P output end, and battery group includes B+ positive pole, B negative pole, and protection circuit board includes protection IC, charging MOS, discharge MOS, and protection circuit board still includes short circuit protection diode, and B+ positive pole of battery group is connected with protection IC, C+ input end and P+ output end electricity respectively, and B negative pole of battery group is connected with protection IC, discharge MOS electricity respectively, and discharge MOS is connected with protection IC, charging MOS electricity respectively again, and charging MOS is connected with protection IC, P output end, the anode of short circuit protection diode electricity respectively again, and the cathode of short circuit protection diode is connected with C input end electricity. The utility model discloses when charging port short circuit fault, can effectively protect circuit, charging battery and equipment, and simple structure, and the cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of baling machine technology, and in particular to a short-circuit resistant rechargeable battery for a handheld electric baling machine. Background Technology

[0002] Handheld electric strapping machines are portable electric strapping devices mainly used for securing goods in industries such as industrial, logistics, building materials, and metal products. Powered by rechargeable batteries, they integrate automatic tightening, heat-sealing, and cutting of the strapping. The heat-sealing method used in handheld electric strapping machines is high-frequency vibration friction heat sealing. Therefore, the vibration of the machine can easily cause short circuits between the positive and negative terminals of the rechargeable battery.

[0003] Currently, conventional handheld electric packing machines do not have charging port short-circuit protection devices for their rechargeable batteries. When the positive and negative terminals of the charging port of the rechargeable battery are short-circuited, it can easily cause damage or burnout to the circuit, rechargeable battery, and equipment, and may even lead to safety accidents. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a short-circuit resistant rechargeable battery for a handheld electric packing machine that can prevent damage and burnout of the circuit, rechargeable battery and equipment when the positive and negative terminals of the charging port of the rechargeable battery are short-circuited, and has a simple structure and low cost.

[0005] To solve the above-mentioned technical problems, this utility model adopts a short-circuit resistant rechargeable battery for a portable electric packing machine, including a shell, a battery pack, a protection circuit board, and an interface. The battery pack and the protection circuit board are both installed inside the shell, and the interface is located on the shell. The interface includes a charging interface and a discharging interface. The charging interface includes a C+ input terminal and a C- input terminal, and the discharging interface includes a P+ output terminal and a P- output terminal. The battery pack includes a B+ positive terminal and a B- negative terminal. The protection circuit board includes a protection IC, a charging MOS, and a discharging MOS. The protection circuit board also includes a short-circuit protection diode. The B+ positive terminal of the battery pack is electrically connected to the protection IC, the C+ input terminal, and the P+ output terminal, respectively. The B- negative terminal of the battery pack is electrically connected to the protection IC and the discharging MOS, respectively. The discharging MOS is also electrically connected to the protection IC and the charging MOS, respectively. The charging MOS is also electrically connected to the protection IC, the P- output terminal, and the anode of the short-circuit protection diode, respectively. The cathode of the short-circuit protection diode is electrically connected to the C- input terminal.

[0006] In a preferred embodiment of this utility model, the short-circuit protection diode is a surface-mount Schottky diode.

[0007] In a preferred embodiment of this utility model, the battery pack is composed of lithium battery cells, and the lithium battery cells are cylindrical cells.

[0008] In a preferred embodiment of this utility model, four cylindrical cells are used, and the four cylindrical cells are connected in series to form the battery pack.

[0009] In a preferred embodiment of this utility model, the battery pack is disposed above the protection circuit board, the charging interface is disposed on the side of the housing, and the discharging interface is disposed on the bottom surface of the housing.

[0010] By adopting the above structure, this utility model has the following beneficial effects: This utility model relates to a short-circuit resistant rechargeable battery for a portable electric packing machine, comprising a housing, a battery pack, a protection circuit board, and an interface. The battery pack and protection circuit board are both installed inside the housing. The interface is located on the housing and includes a charging interface and a discharging interface. The charging interface includes a C+ input terminal and a C- input terminal, and the discharging interface includes a P+ output terminal and a P- output terminal. The battery pack includes a B+ positive terminal and a B- negative terminal. The protection circuit board includes a protection IC, a charging MOS, and a discharging MOS, and also includes a short-circuit protection diode. The B+ positive terminal of the battery pack is electrically connected to the protection IC, the C+ input terminal, and the P+ output terminal. The B- negative terminal of the battery pack is electrically connected to the protection IC and the discharging MOS. The discharging MOS is also electrically connected to the protection IC and the charging MOS. The charging MOS is also electrically connected to the protection IC, the P- output terminal, and the anode of the short-circuit protection diode. The cathode of the short-circuit protection diode is electrically connected to the C- input terminal. This invention utilizes the unidirectional conductivity of a diode to enable or disable the circuit, without affecting battery charging and discharging. Furthermore, it prevents damage or burnout to the circuit, battery, and equipment when a short circuit occurs between the positive and negative terminals of the charging port. This effectively protects the circuit, battery, and equipment. The invention also features a simple structure and low cost.

[0011] The short-circuit protection diode described in this invention is a surface-mount Schottky diode. This provides better short-circuit protection.

[0012] The battery pack of this invention is composed of lithium battery cells, which are cylindrical. This makes it relatively safe, reliable, and easy to install.

[0013] The present invention uses four cylindrical cells, which are connected in series to form the battery pack. This better meets the actual needs of the packaging machine.

[0014] In this invention, the battery pack is positioned above the protection circuit board, the charging interface is located on the side of the outer casing, and the discharging interface is located on the bottom surface of the outer casing. This design is convenient and practical. Attached Figure Description

[0015] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0016] Figure 1 This is a schematic diagram of the circuit principle structure of the anti-short-circuit rechargeable battery for the portable electric packing machine of this utility model.

[0017] Figure 2 This is a schematic diagram of the protective circuit board of this utility model.

[0018] Figure 3 This is a schematic diagram of the cylindrical battery cell, protection circuit board, and charging interface of this utility model. Detailed Implementation

[0019] See Figure 1 , Figure 2 and Figure 3 The illustration shows a short-circuit resistant rechargeable battery for a portable electric packing machine, comprising a housing, a battery pack 100, a protection circuit board 101, and an interface. The battery pack 100 and the protection circuit board 101 are both installed within the housing. The interface is located on the housing and includes a charging interface 102 and a discharging interface. The charging interface 102 includes a C+ input terminal 1 and a C- input terminal 2, and the discharging interface includes a P+ output terminal 3 and a P- output terminal 4. The battery pack 100 includes a B+ positive terminal 5 and a B- negative terminal 6. The protection circuit board 101 includes a protection IC 7, a charging MOS 8, and a discharging... The protection circuit 101 also includes a short-circuit protection diode 10. The B+ positive terminal 5 of the battery pack 100 is electrically connected to the protection IC7, the C+ input terminal 1, and the P+ output terminal 3. The B- negative terminal 6 of the battery pack 100 is electrically connected to the protection IC7 and the discharge MOS9. The discharge MOS9 is in turn electrically connected to the protection IC7 and the charging MOS8. The charging MOS8 is in turn electrically connected to the protection IC7, the P- output terminal 4, and the anode of the short-circuit protection diode 10. The cathode of the short-circuit protection diode 10 is electrically connected to the C- input terminal 2. The outer casing and discharge interface are not shown in the figure.

[0020] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3As shown, the short-circuit protection diode 10 is a surface-mount Schottky diode. Diodes have unidirectional conductivity; when conducting, the current flows from the anode through the tube to the cathode. Schottky diodes have a much larger leakage current than ordinary diodes, but they exhibit excellent performance in high-frequency circuits because their reverse capacitance is smaller. Furthermore, Schottky diodes have a lower forward voltage (VF) than ordinary diodes, resulting in faster response speeds and shorter switching times.

[0021] As a preferred embodiment of this utility model, such as Figure 1 and Figure 3 As shown, the battery pack 100 is composed of lithium battery cells, and the lithium battery cells are cylindrical cells 11.

[0022] As a preferred embodiment of this utility model, such as Figure 1 and Figure 3 As shown, four cylindrical cells 11 are used, and the four cylindrical cells 11 are connected in series to form the battery pack 100.

[0023] As a preferred embodiment of this utility model, such as Figure 1 , Figure 2 and Figure 3 As shown, the battery pack 100 is disposed above the protection circuit 101, the charging interface 102 is disposed on the side of the housing, and the discharging interface is disposed on the bottom surface of the housing. The housing and the discharging interface are not shown in the figure.

[0024] In practical applications, the nominal voltage of a single cylindrical cell 11 is 3.6V and the capacity is 1000mAh. Four cylindrical cells 11 connected in series form a battery pack 100 with a voltage of 14.4V and a capacity of 4000mAh.

[0025] In practical applications, the protection IC7 is a battery management chip in TSSOP16 package.

[0026] After testing, it was found that when the present invention is charging, the short-circuit protection diode conducts in the forward direction, and the battery charges normally; when a short circuit occurs between the positive and negative terminals of the charging port, the short-circuit protection diode blocks the short circuit current in the reverse direction, thereby protecting the circuit and preventing the circuit, battery and equipment from being damaged or burned due to short circuit. The present invention also has a very simple structure and low cost, and has achieved good practical results.

Claims

1. A short-circuit resistant rechargeable battery for a portable electric packing machine, comprising a housing, a battery pack (100), a protection circuit board (101), and an interface, wherein the battery pack (100) and the protection circuit board (101) are both installed inside the housing, and the interface is disposed on the housing, the interface comprising a charging interface (102) and a discharging interface, the charging interface (102) comprising a C+ input terminal (1) and a C- input terminal (2), the discharging interface comprising a P+ output terminal (3) and a P- output terminal (4), the battery pack (100) comprising a B+ positive electrode (5) and a B- negative electrode (6), and the protection circuit board (101) comprising a protection IC (7), a charging MOS (8), and a discharging MOS (9), characterized in that: The protection circuit board (101) also includes a short-circuit protection diode (10). The B+ positive terminal (5) of the battery pack (100) is electrically connected to the protection IC (7), C+ input terminal (1) and P+ output terminal (3) respectively. The B- negative terminal (6) of the battery pack (100) is electrically connected to the protection IC (7) and discharge MOS (9) respectively. The discharge MOS (9) is also electrically connected to the protection IC (7) and charging MOS (8) respectively. The charging MOS (8) is also electrically connected to the protection IC (7), P- output terminal (4) and the anode of the short-circuit protection diode (10) respectively. The cathode of the short-circuit protection diode (10) is electrically connected to the C- input terminal (2).

2. The short-circuit resistant rechargeable battery for the handheld electric packing machine according to claim 1, characterized in that: The short-circuit protection diode (10) is a surface-mount Schottky diode.

3. The short-circuit resistant rechargeable battery for the handheld electric packing machine according to claim 1, characterized in that: The battery pack (100) is composed of lithium battery cells, which are cylindrical cells (11).

4. The short-circuit resistant rechargeable battery for the handheld electric packing machine according to claim 3, characterized in that: The cylindrical cell (11) is four in number, and the four cylindrical cells (11) are connected in series to form the battery pack (100).

5. The short-circuit resistant rechargeable battery for the handheld electric packing machine according to claim 1, characterized in that: The battery pack (100) is disposed above the protection circuit board (101), the charging interface (102) is disposed on the side of the housing, and the discharging interface is disposed on the bottom surface of the housing.

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